About what percent of all insects is phytophagus?
1. | 1 % | 2. | 25 % |
3. | 65 % | 4. | 99 % |
Identify the correctly matched pairs:
I: |
Sieve cell |
Food conducting element in gymnosperms |
II: |
Sieve-tube element |
Food conducting element in angiosperms |
III: |
Albuminous cells |
Delivery of substances to sieve-tube element |
IV: |
Companion cell |
Delivery of substances to sieve cells |
1. Only I and II
2. Only III and IV
3. Only I and III
4. Only II and IV
Rhizobium:
1. | lives as aerobe under free-living conditions with an operational nitrogenase that does not fix nitrogen |
2. | lives as anaerobe under free-living conditions with a non operational nitrogenase |
3. | lives as aerobe during nitrogen-fixing conditions with an operational nitrogenase |
4. | lives as anaerobe during nitrogen-fixing conditions with an operational nitrogenase |
Productivity is the rate of production of biomass expressed in terms of :
i.
ii.
iii.
iv.
1. | ii | 2. | iii |
3. | ii and iv | 4. | i and iii |
1. | Stratification | 2. | Scarification |
3. | Standing crop | 4. | Standing state |
Give = 0.25 MPa and = -0.50 MPa,what will be the resulting Ψ:
1. +0.75 MPa.
2. -0.75 MPa.
3. -0.25 MPa.
4. +0.25 MP
Which one of the following combinations would a sugarcane farmer look for in the sugarcane crop?
1. | Thick stem, long internodes, high sugar content, and disease resistant |
2. | Thick stem, high sugar content, and profuse flowering |
3. | Thick stem, short internodes, high sugar content, disease resistant |
4. | Thick stem, low sugar content, disease resistant |
I: | SCP is commonly grown on agricultural waste products, and as such inherits the ecological footprint and water footprint of industrial agriculture. |
II: | Microorganisms usually have a much higher protein content of 30–70% in the dry mass than vegetables or grains. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Sucrose is converted into glucose and fructose by the enzyme:
1. Sucrase | 2. Aldolase |
3. Invertase | 4. Zymase |
The outer hard layer of the pollen wall is made up of:
1. | Callose, which is easily digested by enzymes |
2. | Sporopollenin, which is resistant to all enzymes |
3. | Hemicellulose, which is difficult to digest by enzymes |
4. | Calcium pectate, which is easily digested by enzymes |
During which stage of mitosis do the following events occur?
I. Centromeres split and chromatids separate
II. Chromatids move to opposite poles
1. | Prophase | 2. | Metaphase |
3. | Anaphase | 4. | Telophase |
What percentage of total oxygen in the earth’s atmosphere is produced by Amazon rainforest through photosynthesis?
1. | 50 | 2. | 40 |
3. | 30 | 4. | 20 |
In some viruses, the flow of genetic information is from RNA to DNA. These viruses are:
1. | Reverse transcriptases | 2. | Reoviruses |
3. | Ribozymes | 4. | Retroviruses |
Root hairs at the root tip are formed by:
1. | Epidermal cells in the region of maturation |
2. | Cortical cells in the region of elongation |
3. | Epidermal cells in the region of elongation |
4. | Cortical cells in the region of maturation |
Ovary is one chambered but it becomes two chambered due to the formation of a false septum in:
1. | Mustard and Argemone | 2. | Argemone and Dianthus |
3. | Mustard and Primrose | 4. | Argemone and Primrose |
Match each item in column I with one in Column II and select the correct answer from the codes given:
Column I |
|
Column II |
|
A |
Monascus purpureus |
P |
Thrombolytic |
B |
Trichoderma polysporum |
Q |
Immunosuppressant |
C |
Streptococcus pyogenes |
R |
Antibiotics |
D |
Streptomyces griseus |
S |
Statins |
Codes
A |
B |
C |
D |
|
1 |
S |
Q |
R |
P |
2 |
Q |
S |
P |
R |
3 |
Q |
S |
R |
P |
4 |
S |
Q |
P |
R |
1. | The use of living cells and bacteria in industrial and scientific processes. |
2. | The integration of natural sciences and organisms, cells, parts thereof, and molecular analogues for products and services. |
3. | The use of biology to solve problems and make useful products. |
4. | The use of biology to develop new products, methods and organisms intended to improve human health and society. |
1. | Carboxylation → Reduction →Regeneration |
2. | Carboxylation → Regeneration →Reduction |
3. | Regeneration → Reduction → Carboxylation |
4. | Reduction → Regeneration → Carboxylation |
Casparian strips are:
1. | waxy deposition of suberin on only the tangential walls of the endodermal cells |
2. | waxy deposition of suberin on only the radial walls of the endodermal cells |
3. | waxy deposition of suberin on both tangential and radial walls of the endodermal cells |
4. | waxy deposition of lignin on both tangential and radial walls of the endodermal cells |
1. | Glycine | 2. | Alanine |
3. | Serine | 4. | Lysine |
The cell walls of diatoms are ‘indestructible’ as they are embedded with:
1. | Silica | 2. | Chitin |
3. | Calcium | 4. | Raphides |
The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in classification of plants?
1. Class | 2. Order |
3. Division | 4. Family |
Identify the incorrect statement:
1. | As compared to the bryophytes, pteridophytes have sporophyte as the main plant body |
2. | Pteridophyte sporophyte has well differentiated true roots, stem and leaves |
3. | Selaginella has macrophylls like ferns |
4. | In sporophyte of ferns, leaf-like appendages called sporophylls subtend sporangia |
1. | a nematode, Meloidogyne incognita. |
2. | a nematode, Caenorhabditis elegans. |
3. | a trematode, Clonorchis sinensis. |
4. | a cestode, Taenia sloium. |
A | B | C | |
1. | Insects | Echinoderms | Molluscs |
2. | Insects | Molluscs | Crustaceans |
3. | Crustaceans | Insects | Molluscs |
4. | Molluscs | Crustaceans | Insects |
The Environment [protection] Act to protect and improve the quality of our environment [Air, Water and Soil] was passed by the Government of India in:
1. | 1974 | 2. | 1981 |
3. | 1986 | 4. | 1988 |
I: | Trichoderma species are free-living fungi that are very common in root ecosystems. |
II: | Baculoviruses belong to the Genus Nucleopolyhedrovirus. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
In RNA splicing:
1. | Exons are removed and introns are joined together |
2. | Introns are removed and exons are joined together |
3. | Cistrons are removed and introns are joined together |
4. | Introns are removed and Cistrons are joined together |
A basal body is a part of bacterial:
1. | Inclusion bodies | 2. | Chromosomal DNA |
3. | Flagellum | 4. | Plasmid |
Match the following :
A. IAA | i. Herring sperm DNA |
B. ABA | ii. Bolting |
C. Ethylene | iii. Stomatal closure |
D. GA | iv. Weed-free lawns |
E. Cytokinins | v. Ripening of fruits |
Options:
A | B | C | D | E | |
1. | iv | iii | v | ii | i |
2. | v | iii | iv | ii | i |
3. | iv | i | v | iii | ii |
4. | v | iii | ii | i | iv |
Identify the correct statements:
I. | Clear-cut vegetative, juvenile, and senescent phases are seen only in perennial plants. |
II. | Neelakurinji flowers once in 12 years. |
III. | Bamboo flowers only once in their lifetime. |
1. | Only III |
2. | Only II and III |
3. | Only I and II |
4. | I, II, and III |
In a test cross, the plant expressing the dominant phenotype is crossed with the plant:
1. | Which is heterozygous dominant |
2. | Which is heterozygous recessive |
3. | Which is homozygous recessive |
4. | Which is homozygous dominant |
Pollens grains are long ribbon-like and are carried passively in water in:
1. | female plants remain submerged in water |
2. | male plants remain submerged in water |
3. | both male and female plants remain submerged in water |
4. | both male and female plants reach the surface of the water. |
I: | Many species of fig trees can only be pollinated by their ‘partner’ wasp species and no other species. |
II: | The female wasp does not derive any benefit from this relationship. |
A | B | C | D | |
1. | Synergid | Polar nuclei | Male gamete | Antipodal |
2. | Synergid | PEN | Male gamete | Antipodal |
3. | Antipodal | Polar nuclei | Egg cell | Synergid |
4. | Antipodal | PEN | Egg cell | Synergid |
Assertion (A): | Conventional breeding is not the answer if we want to increase yield in the existing crop varieties. |
Reason (R): | The existing crop varieties have evolved into new species and traditional hybridisation is not possible now. |
1. | Both (A) and (R) are False. |
2. | Both (A) and (R) are True but (R) does not explain (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are True and (R) explains (A). |
Statement I: | Entire biosphere is regarded as a global ecosystem by many ecologists. |
Statement II: | The global ecosystem is divided into terrestrial and aquatic ecosystem for convenience. |
1. | Only Statement I is correct. |
2. | Only Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect. |
It is a common observation that pine seedlings grown in sterile potting soil grow much slower than seedlings grown in soil from the area where the seeds were collected. The most probable cause for this would be:
1. | damage to root hairs during the sterilization process. |
2. | the absence of mycorrhizae in the sterilized soil. |
3. | lack of essential minerals in a sterilized soil. |
4. | non functioning of protein pumps in the sterilized soil. |
Consider the given statements:
Statement I: | In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol. |
Statement II: | In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise. |
1. | Both Statement I and Statement II are correct |
2. | Both Statement I and Statement II are incorrect |
3. | Statement I is correct but Statement II is incorrect |
4. | Statement I is incorrect but Statement II is correct |
Match each item in Column I with one in Column II and select the correct answer from the codes given:
A. Spring [early] wood | a. Xylary elements with wider cavities |
B. Autumn [late] wood | b. Xylary elements with narrow vessels |
C. Heartwood | c. Central or innermost layers of secondary xylem |
D. Sapwood | d. Peripheral region of the secondary xylem |
A | B | C | D | |
1. | a | b | c | d |
2. | a | b | d | c |
3. | b | a | c | d |
4. | b | a | d | c |
I: | The process, by which exposure to cold renders plants competent to flower is called vernalization. |
II: | Even after vernalization, the plant must be subjected to a suitable photoperiod, usually long days. |
III: | Like photoperiod, vernalization is also perceived in leaves. |
IV: | In most biennial long day plants that form rosettes, gibberellins treatment can substitute for the cold requirement. |
1. | Only I, II and III | 2. | Only I, II and IV |
3. | Only II, III and IV | 4. | I, II, III and IV |
1. | Normally the cause if an excess of nutrients applied to the soil. |
2. | Some nutrients leach into the soil and get drained into the water body. |
3. | Some nutrients run off over the ground into the body of water. |
4. | The excess nutrients cause an algal bloom. |
7. | Eventually, the algal bloom dies, sinks to the bottom of the lake, gets decomposed by bacteria which increases the dissolved oxygen in the water body. |
8. | Increased dissolved oxygen content is dangerous to larger life forms. |
1. | All | 2. | All except 7 and 8 |
3. | All except 1, 3, and 4 | 4. | Only 1 and 2 |
I. | Sporophytic generation is represented only by the one-celled zygote. |
II. | Meiosis in zygote results in the formation of haploid gametes. |
III. | The dominant photosynthetic stage is the free living gametophyte |
1. | Only I is correct |
2. | Only I and III are correct |
3. | Only II is correct |
4. | I, II and III are correct |
What limitation of traditional hybridization procedures used in plant and animal breeding can be overcome by recombinant DNA procedures?
I: | Inclusion and multiplication of undesirable genes |
II: | Inability of inclusion of desirable traits from other species |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Assertion (A): | The distance between the two strands of the DNA helix is approximately uniform. |
Reason (R): | Base pairing is complementary, where a purine always base pairs with a pyrimidine and a pyrimidine always base pairs with a purine. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
I: | Plastoquinone is located within the membrane |
II: | Plastocyanin is located on the inner lumen side of the membrane |
III: | NADP reductase is located on the stroma side of the membrane |
1. | Only I and II are correct |
2. | Only I and III are correct |
3. | Only II and III are correct |
4. | I, II and III are correct |
Match the fungi [Column I] with the Class to which it belongs [Column II] and select the correct answer from the codes given:
|
Column I |
|
Column II |
A. |
Ustilago tritici |
P. |
Phycomycetes |
B. |
Albugo candida |
Q. |
Ascomycetes |
C. |
Alternaria solani |
R. |
Basidiomycetes |
D. |
Claviceps purpurea |
S. |
Deuteromycetes |
Codes
A |
B |
C |
D |
|
1. |
R |
P |
S |
Q |
2. |
Q |
P |
S |
R |
3. |
R |
S |
P |
Q |
4. |
Q |
S |
P |
R |
The ecological pyramids that can never be inverted in a natural ecosystem include:
I: | pyramid of numbers |
II: | pyramid of energy in any ecosystem |
III: | pyramid of biomass in the sea |
1. Only II
2. Only III
3. Only II and III
4. All can be inverted
1. | The floral diagram is for Family Fabacea and the floral formula is for Family Solanaceae |
2. | The floral diagram is for Family Solaneceae and the floral formula is for Family Fabaceae |
3. | Both floral diagram and floral formula are for Family Liliaceae |
4. | Both floral diagram and floral formula are for Family Solanaceae |
Natural methods for contraception work on the principle of:
1. Preventing fertilization
2. Preventing implantation
3. Preventing ovulation
4. Preventing embryo development
1. | Gastrovascular cavity has a single opening, mouth on hypostome. |
2. | Corals are cnidarians and have a skeleton of calcium carbonate. |
3. | They exhibit tissue level of organization and are diploblastic. |
4. | Digestion is exclusively intracellular. |
Communication junctions found at some fusion points that allow the cardiac muscle cells to contract as a unit are called as:
1. Intercalated discs
2. Sarcolemma
3. Nodes of Ranvier
4. Motor end plates
The agricultural practice of breeding and raising livestock is called:
1. | Domestication | 2. | Breeding |
3. | Animal husbandry | 4. | Bio-fortification |
Column I | Column II |
A. Peripheral neural system | P. Comprises of all nerves associated with brain and spinal cord |
B. Somatic neural system | Q. Relays impulses from CNS to skeletal muscles |
C. Visceral neural system | R. Transmits impulse from CNS to involuntary organs and smooth muscles |
D. Autonomic neural system | S. Part of PNS where impulses travel from CNS to the viscera and from the viscera to the CNS |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | R | S | P |
3. | R | S | P | Q |
4. | S | P | Q | R |
The correct sequence of mammalian mammary gland ducts beginning from the alveoli would be:
1. | Mammary tubules → Mammary ducts → Mammary ampulla → Lactiferous ducts |
2. | Lactiferous ducts → Mammary ducts → Mammary ampulla → Mammary tubules |
3. | Lactiferous ducts → Mammary ampulla → Mammary ducts → Mammary tubules |
4. | Mammary tubules → Mammary ampulla → Mammary ducts → Lactiferous ducts |
1. | The Human Genome Project was a 13-year project coordinated by the U.S. Department of Energy and the National Institute of Health. |
2. | Many non-human model organisms, such as bacteria, yeast, Caenorhabditis Elegans (a free-living non-pathogenic nematode), Drosophila (the fruit fly), plants (rice and Arabidopsis), etc., have also been sequenced. |
3. | The sequence of chromosome 1 was completed only in May 2016 (this was the last of the 24 human chromosomes – 22 autosomes and X and Y – to be sequenced). |
4. | The fragments were sequenced using automated DNA sequencers that worked on the principle of a method developed by Frederick Sanger. |
All the following are parts of human axial skeleton except:
1. | Sternum | 2. | Vertebrae |
3. | Hyoid | 4. | Scapula |
Identify the incorrect statement regarding nucleolus:
1. | Their content is continuous with nucleoplasm |
2. | It is site for active rRNA synthesis |
3. | Their number is always one per nucleus |
4. | Larger nucleoli are present in cells actively carrying out protein synthesis |
Identify the incorrectly matched pair regarding Plasmodium, the protozoan responsible for causing malaria in humans:
1. |
Cause of malignant tertian malaria |
Plasmodium falciparum |
2. |
Paroxysm [clinical features] of malaria |
Release of hemozoin on rupture of RBCs |
3. |
Fertilization during the life cycle |
Gut of female anopheles |
4. |
Infective stage to mankind |
Trophozoites |
Which of the following stages of Prophase I of meiosis I can last for many months or years in certain vertebrate oocytes?
1. | Zygotene | 2. | Pachytene |
3. | Diplotene | 4. | Diakinesis |
Consider the given two statements:
I: | Palmitic acid has 16 carbons including the carboxyl carbon. |
II: | Arachidonic acid has 20 carbons including the carboxyl carbon. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
The peptide thyroid hormone that lowers calcium and phosphate ion concentration in the blood is:
1. thyroxine | 2. triiodothyronine |
3. calcitonin | 4. thyroid-stimulating hormone |
The figure given below shows the conversions of a substrate into product by an enzyme. In which one of the four options (1-4), the components of the reaction labelled as A, B, C and D are identified correctly:
Options
A | B | C | D | |
1. | Transition state |
Potential energy |
Activation energy without enzyme |
Activation energy with enzyme |
2. | Potential energy |
Transition state |
Activation energy with enzyme |
Activation energy without enzyme |
3. | Activation energy with enzyme |
Transition state |
Activation energy without enzyme |
Potential energy |
4. | Potential energy |
Transition state |
Activation energy without enzyme |
Activation energy with enzyme |
On a logarithmic scale, the species-area relationship turns out to be a:
1. | Straight line | 2. | Rectangular hyperbola |
3. | Bell shaped | 4. | U shaped |
Leydig cells synthesize androgens under the direct influence of:
1. | FSH | 2. | LH |
3. | FSH and LH | 4. | GnRH |
ELISA is based on the principle of:
1. | Complementary hybridization of nucleic acids |
2. | Antigen-antibody interaction |
3. | Clonal selection |
4. | Southern blot |
1. | Pelycosaurs | 2. | Synapsids |
3. | Tuataras | 4. | Thecodonts |
Consider the two statements:
I: | The process of filtration at Malpighian body is regarded as ultrafiltration. |
II: | Blood is filtered so finely that all constituents of plasma pass into the lumen of Bowman’s capsule. |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | I is incorrect but II is correct |
The binding of oxygen with hemoglobin is primarily related to:
1. | Partial pressure of carbon dioxide |
2. | Partial pressure of oxygen |
3. | H+ ion concentration in body fluids |
4. | Presence of 2,3-DPG in erythrocytes |
The nodal musculature of the heart has the capability to generate impulse:
1. | on stimulation by the sympathetic division of the autonomic nervous system |
2. | on stimulation by the parasympathetic division of the autonomic nervous system |
3. | on stimulation by the somatic neural division of the peripheral nervous system |
4. | without any external stimulus |
It is unfortunate that in our society women are blamed for producing female children and have been ostracised and ill-treated because:
1. | The sex is determined by the type of sperm fertilizing the egg |
2. | The sex is determined by the type of egg fertilizing the sperm |
3. | The sex is determined by the hormones produced by the fetus |
4. | The sex is determined by God’s Will |
Match each item in Column I [Hormone] with one in Column II [Function] and select your answer from the codes given:
Column I |
Column II |
A. ADH |
a. Makes collecting duct permeable to water and urea |
B. PTH |
b. Stimulates osteoclasts |
C. LH |
c. Rupture of Graafian follicle leading to ovulation |
D. ANF |
d. Causes vasodilation |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | a | b | d | c |
3. | b | a | d | c |
4. | b | a | c | d |
1. | In males, pelvic fins bear claspers |
2. | Some of them have electric organs [Torpedo] |
3. | None of them is viviparous |
4. | Some possess poison sting [Trygon] |
It is necessary to remove sulphur from petroleum products to
1. | reduce the emission of sulphur dioxide in exhaust fumes |
2. | increase efficiency of automobiles' engines |
3. | use sulphur removed from petroleum for commercial purposes |
4. | increase the life span of engine silencers |
1. | Branching descent and natural selection |
2. | Saltation and Catastrophism |
3. | Use and disuse of organs and inheritance of acquired traits |
4. | Reproductive isolation and Founder effect |
The "Southern" technique involves:
1. | the detection of DNA fragments on membranes by specific radioactive antibodies. |
2. | the detection of proteins on membranes using a radioactive DNA probe. |
3. | the detection of DNA fragments on membranes by a radioactive DNA probe. |
4. | the detection of proteins on membranes using specific radioactive antibodies. |
A statutory ban on amniocentesis in India was necessary because:
1. | It is very expensive |
2. | It can tell about chromosomal aberrations |
3. | It is an invasive procedure and carries a high risk of abortions |
4. | It can be used for pre-natal sex determination of the fetus leading to female feticides |
The second heart sound [dub] is associated with simultaneous closure of:
1. | Right AV and pulmonary semilunar valve |
2. | Left AV and aortic semilunar valve |
3. | Right and left AV valves |
4. | Right and left semilunar valves |
A motor neuron along with all the muscle fibers innervated by it constitute a:
1. Fascicle | 2. Motor end plate |
3. Motor unit | 4. Myoneural junction |
In the logistic growth equation given below, the carrying capacity is represented by:
\(\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}\left(\frac{\mathrm{K}-\mathrm{N}}{\mathrm{K}}\right)\)
1. | N | 2. | r |
3. | K | 4. | K – N / K |
Secondary lymphoid organs:
1. | Are those where immature lymphocytes differentiate |
2. | Provide a site of interaction between lymphocytes and antigens |
3. | Are formed after birth |
4. | Are bone marrow and MALT |
A host cell normally does not take up a foreign DNA until it has been made competent to do so. This is because:
1. | DNA is a hydrophilic molecule |
2. | DNA is a very large molecule |
3. | there are no receptors for DNA on the cell membrane |
4. | DNA is an inert molecule |
When Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny, the F2 ratio deviated very significantly from the 9:3:3:1 ratio. This can be attributed to the fact that:
1. | The genes are located on the X and Y chromosomes. |
2. | Fruit fly has abnormal chromosomes. |
3. | The genes are located on the X chromosome. |
4. | The genes exhibit incomplete dominance. |
I: | Pacific salmon and bamboo breed many times during their lifetimes. |
II: | Birds and mammals breed many times during their lifetimes and produce a small number of large-sized offspring. |
III: | Oysters and pelagic fishes produce a large number of small-sized offspring. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
The spermatids are transformed into spermatozoa by a process called:
1. | Spermiation | 2. | Spermatocytogenesis |
3. | Spermiogenesis | 4. | Spermatolysis |
Assertion (A): | In Avery, Macleod, and McCarty's experiment, digestion of heat-killed lysate with proteases and RNases did not affect transformation but digestion with DNase did. |
Reason (R): | DNase will hydrolyse all biomolecules in the lysate except DNA. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
4. | Both (A) and (R) are False. |
I: | The green house effect is a natural phenomenon responsible for heating of earth’s surface and atmosphere. |
II: | Greenhouse gases absorb short wave UV radiation and emit it again towards the earth. |
III: | During the past century, the temperature of earth has increased by 60C |
1. | Only Statement I |
2. | Only Statement III |
3. | Only Statement II and Statement III |
4. | Only Statement I and Statement II |
Assertion (A): | There is a need for the recombinant DNA to be expressed in recombinant DNA technology procedures. |
Reason (R): | In almost all recombinant DNA technologies, the ultimate aim is to produce a desirable protein. |
1. | Both (A) and (R) are False. |
2. | Both (A) and (R) are True and (R) explains (A). |
3. | Both (A) and (R) are True but (R) does not explain (A). |
4. | (A) is True but (R) is False. |
Anal styles are borne on the:
1. | 9th segment only in female cockroach |
2. | 9th segment only in male cockroach |
3. | 10th segment only in female cockroach |
4. | 10th segment only in male cockroach |
Statement I: | They evolved in a similar environment, rather than inherited from a recent common ancestor. |
Statement II: | They have a common descent and have evolved from a shared ancestor. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
Consider three genes: X, Y, and Z. The recombination frequency between X-Y, X-Z, and Y-Z gene pairs was found to be 50%, 25%, and 50%, respectively. What would be the right inference?
1. | genes X and Y are on the same chromosome |
2. | genes X and Z are on different chromosomes |
3. | genes Y and Z are on different chromosomes |
4. | All three genes are located on the same chromosome |
Study the diagram given and choose the correct statement:
1. | A: Retrovirus replicates outside the cell |
2. | B: Viral DNA is produced by the host's enzyme - reverse transcriptase |
3. | C: Viral DNA incorporates into the host genome |
4. | D: New viral DNA is produced by the infected cell |
Kwashiokor | Marasmus | ||
A. | Deficiency of | Proteins | Proteins and calories |
B. | Age of onset | Less than one year | More than one year |
C. | Characteristic clinical feature | Oedema [swelling] | Emaciation [loss of muscle mass and subcutaneous fat] |
1. Only B | 2. Only C |
3. Only B and C | 4. A, B and C |
The efficiency of a respiratory system is enhanced by all the following except:
1. | increasing the surface area available for diffusion of gases |
2. | decreasing the distance over which the gases must diffuse |
3. | increasing the concentration differences of gases inside and outside the system |
4. | drying the system out so the gases do not have to diffuse through water |
Consider the given statements regarding the human vertebral column:
I: | In adults, it is differentiated into cervical [7], thoracic [12], lumbar [5], sacral [1-fused] and coccygeal [1-fused] regions. |
II: | The first vertebra is called as axis and it articulates with the occipital condyles. |
III: | The spinal cord runs through a neural canal. |
IV: | It protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back. |
The correct statements include:
1. Only I | 2. Only I and IV |
3. Only II and III | 4. Only I, III, and IV |
A | Frontal lobe | Planning, reasoning and problem solving |
B | Parietal lobe | Integrating sensory information, including touch, temperature, pressure and pain |
C | Occipital lobe | Location of the primary visual cortex which receives visual information from the eyes |
D | Temporal lobe | Contains the primary auditory cortex, which receives auditory information from the ears |
1. | Only A and B | 2. | Only A, B and C |
3. | Only B, C and D | 4. | A, B, C and D |
Statement 1: | Hemichordates were earlier considered as a sub-phylum under Phylum Chordata but are now placed separately in a phylum under non-Chordata. |
Statement 2: | Hemichordates have a rudimentary structure in the collar region called stomochord, a structure homologous to the notochord. |
1. | Both Statement 1 and Statement 2 are correct but Statement 2 does not explain Statement 1. |
2. | Statement 1 is correct and Statement 2 is incorrect. |
3. | Both Statement 1 and Statement 2 are incorrect. |
4. | Both Statement 1 and Statement 2 are correct and Statement 2 explains Statement 1. |
1. | The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes. |
2. | The ascending limb of loop of Henle is impermeable to water but allows transport of electrolytes actively or passively. |
3. | DCT is capable of reabsorption of bicarbonate ions and selective secretion of hydrogen and potassium ions and ammonia to maintain the pH and electrolyte balance in the body. |
4. | PCT does not play any role in reabsorption of bicarbonate ions and selective secretion of hydrogen and ammonia to maintain the pH and electrolyte balance in the body. |