Which one of the following will not directly affect transpiration?
1. Temperature | 2. Light |
3. Wind speed | 4. Chlorophyll content of leaves |
The most abundant intracellular cation is:
1.
2.
3.
4.
Photorespiration is a wasteful process. Why is it so?
1. The number of ATP molecules produced in the pathway is very low.
2. The number of NADPH molecules produced in the pathway is very low.
3. The synthesis of sugars in the pathway requires a large input of ATP energy.
4. There is neither synthesis of sugars, nor of ATP in the pathway.
The dough kept overnight in warm weather becomes soft and spongy because of
1. Fermentation
2. Cohesion
3. Osmosis
4. Absorption of carbon dioxide from the atmosphere
If fatty acids were to enter the respiratory pathway, they must be converted to a molecule with:
1. | Two carbons | 2. | Three carbons |
3. | Five carbons | 4. | Six carbons |
The given age pyramid represents a:
1. | Fast expanding population | 2. | Slowly expanding population |
3. | Stable population | 4. | Declining population |
Among the ecosystem mentioned below, where can one find maximum biodiversity?
1. | Mangroves | 2. | Desert |
3. | Coral reefs | 4. | Alpine meadows |
Which of the following would necessarily decrease the density of a population in a given habitat?
1. | Natality> mortality | 2. | Immigration >emigration |
3. | Mortality and emigration | 4. | Natality and immigration |
Select the wrong statement.
1. Mycoplasma is a wall-less microorganism
2. Bacterial cell wall is made up of peptidoglycan
3. Pili and fimbriae are mainly involved in motility of bacterial cells
4. Cyanobacteria lack flagellated cells
Epigynous flower is seen in:
1. | China rose | 2. | Brinjal |
3. | Mustard | 4. | Ray florets of sunflower |
Meiosis is characterised by
1. Reduction division
2. Equal division
3. Both reduction and equal division
4. None of these
Roots developed from parts of the plant other than radicle are called
1. Taproots
2. Fibrous roots
3. Adventitious roots
4. Nodular roots
In which of the following pairs of parts of a flowering plant is epidermis absent?
1. | Root tip and shoot tip | 2. | Shoot bud and floral bud |
3. | Ovule and seed | 4. | Petiole and pedicel |
Consider the following regarding the reasons for the fact that now Cyanobacteria are kept in Monera and not in Plantae:
I. They are prokaryotes.
II. The cell wall of cyanobacteria has peptidoglycan.
III. They can fix atmospheric nitrogen.
The correct explanations would be:
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
The giant redwood tree, Sequoia, belongs to:
1. | Bryophyta | 2. | Pteridophyta |
3. | Gymnospermae | 4. | Angiospermae |
Mammals living in a colder environment have:
1. Small body size
2. Low metabolic rate
3. Small appendage size
4. Less body fat
Which of the following proved effective for biological control of nematodal disease in plants?
1. Paecilomyces lilacinus
2. Pisolithus tinctorius
3. Pseudomonas cepacia
4. Gliocladium virens
A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of the cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
1. | Polyteny | 2. | Aneuploidy |
3. | Polyploidy | 4. | Somaclonal variation |
Plants with ovaries having only one or a few ovules, are generally pollinated by:
1. Bees
2. Butterflies
3. Birds
4. Wind
What is not for genetic code
1. It is unambiguous
2. A codon in mRNA is read in a non-contiguous fashion
3. It is nearly universal
4. It is degenerate
Which of the following is not an X – linked recessive disorder in humans?
1. Red-green colour blindness
2. Haemophilia
3. Duchenne muscular dystrophy
4. Vitamin D-resistant rickets
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 |
The germ pore in the pollen wall:
1. | is an aperture in the pollen intine that allows the pollen tube to exit. |
2. | is the name of the nucleus of the microspore mother cell. |
3. | is formed where sporopollenin is located in the exine. |
4. | is an aperture in the pollen exine that allows the pollen tube to exit. |
The body of the ovule fuses with the funicle in the region called:
1. | Chalaza |
2. | Micropyle |
3. | Hilum |
4. | Nucellus |
What is the number of linkage groups in humans?
1. 22
2. 23
3. 24
4. 46
If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of N15/N15: N15/N14: N14/N14 containing DNA in the fourth generation would be:
1. | 1:1:0 | 2. | 1:4:0 |
3. | 0:1:3 | 4. | 0:1:7 |
What is incorrect regarding organic farming?
1. | It relies on controlling pests by natural predation rather than introduced chemicals. |
2. | A key belief of the organic farmer is that biodiversity furthers health. |
3. | Pests are totally eradicated. |
4. | Reduces dependence on toxic chemicals and pesticides. |
During diakinesis of prophase I:
I. Terminalisation of chiasmata takes place.
II. Meiotic spindle is assembled.
III. Nucleolus disappears and the nuclear membrane breaks down.
The correct statements are:
1. | I, II and III | 2. | I and II only |
3. | I and III only | 4. | II and III only |
The concentrations of ions is significantly higher in the vacuoles than in the cytoplasm. The reason for this is:
1. Facilitated diffusion of the ions by the tonoplast
2. Active transport of the ions by the tonoplast
3. Presence of porins for diffusion of the ions
4. Bulk transport across the tonoplast
Which of the following statements is not correct?
1. Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
2. Lysosomes have numerous hydrolytic enzymes.
3. The hydrolytic enzymes of lysosomes are active under acidic pH.
4. Lysosomes are membrane bound structure.
Match the following with respect to meiosis:
(a) | Zygotene | (i) | Terminalization |
(b) | Pachytene | (ii) | Chiasmata |
(c) | Diplotene | (iii) | Crossing over |
(d) | Diakinesis | (iv) | Synapsis |
Select the correct option from the following:
(a) | (b) | (c) | (d) | |
1. | (iv) | (iii) | (ii) | (i) |
2. | (i) | (ii) | (iv) | (iii) |
3. | (ii) | (iv) | (iii) | (i) |
4. | (iii) | (iv) | (i) | (ii) |
Name the enzyme that facilitates opening of DNA helix during transcription.
1. DNA helicase
2. DNA polymerase
3. RNA polymerase
4. DNA ligase
Who coined the term 'Kinetin'?
1. | Skoog and Miller | 2. | Darwin |
3. | Went | 4. | Kurosawa |
Select the incorrect statement.
1. Transport of molecules in phloem can be bidirectional.
2. The movement of minerals in the xylem is unidirectional.
3. Unloading of sucrose at the sink does not involve the utilization of ATP.
4. Elements most easily mobilized in plants from one region to another are phosphorus, sulfur, nitrogen, and potassium.
During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
1. | Oxygen | 2. | Water |
3. | Carbon dioxide | 4. | Light |
Diffusion:
I. does not require any energy expenditure
II. is dependent on a living system
III. is a fast process
IV. is the only means for gaseous movements in plants
1. Only I and IV are correct
2. Only I, II and IV are correct
3. Only I, III and IV are correct
4. Only II and III are correct
Among the following bio-geo-chemical cycles, which one does not have losses due to respiration?
1. Phosphorus
2. Nitrogen
3. Sulphur
4. All of the above
Which one is endangered medicinal plant
1. Ocimum
2. Nepenthes
3. Podophyllum
4. Garlic
Which one of the following is not used for disinfection of drinking water?
1. Chlorine
2. Ozone
3. Chloramine
4. Phenyl
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 |
Which one of the following cellular parts is correctly described ?
1. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
2. Centrioles - sites for active RNA synthesis
3. Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
4. Lysosomes - optimally active at a pH of about 8.5
All the following key events take place during telophase of mitosis except:
1. Chromosomes cluster at the opposite spindle poles
2. Chromosomes become discrete
3. Nuclear envelope reforms
4. Nucleolus, ER and Golgi complex reform
The technology of biogas production from cow dung was developed in India largely due to the efforts of:
1. | Gas Authority of India |
2. | Oil and Natural Gas Commission |
3. | Indian Agricultural Research Institute and Khadi & Village Industries Commission |
4. | Indian Oil Corporation |
Which one of the following is wrong about Chara?
1. | Globule and nucule present on the same plant |
2. | Upper antheridium and lower oogonium |
3. | Globule is a male reproductive structure |
4. | Upper oogonium and lower round antheridium |
Self fertilising trihybrid plants form
1.Eight different gametes and 64 different zygotes
2. Four different gametes and sixteen different zygotes
3. Eight different gametes and sixteen different zygotes
4. Eight different gametes and thirty two different zygotes
A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
1. Blood group B
2. Blood group AB
3. Blood group O
4. Blood group A
Match Column-I with Column-II and select the correct option using the codes given bel
Column-I Column-II
a. Pistils fused together (i) Gametogenesis
b. Formation of gametes (ii) Pistillate
c. Hyphae of higher Ascomycetes (iii) Syncarpous
d. Unisexual female flower (iv) Dikaryotic
Codes:
a b c d
1. (iii) (i) (iv) (ii)
2. (iv) (iii) (i) (ii)
3. (ii) (i) (iv) (iii)
4. (i) (ii) (iv) (iii)
If each strand of a dsDNA acts as a template for a new strand, the two daughter DNAs will be:
1. | Complementary to each other |
2. | Identical to the parental DNA |
3. | Similar to each other |
4. | Complementary to the parental DNA |
Sickle cell anemia is caused by:
1. | Chromosomal aberration | 2. | Point mutation |
3. | Non-disjunction event | 4. | An arthropod vector |
The main reason for the success of the green revolution was:
1. Improvement in the efficiency of chemical pesticides
2. Improvement in irrigation facilities
3. Equitable distribution of land among farmers
4. Development of HYV varieties
Low Ca2+ in the body fluid may be the cause of
1. | tetany | 2. | anaemia |
3. | angina pectoris | 4. | gout |
In human females, meiosis-II is not completed until
1. puberty
2. fertilization
3. uterine implantation
4. birth
In which one of the following, the genus name, its two characters and its, class/phylum are correctly matched?
Genus name | Two characters | Class/phylum | ||
1. | Ascaris | (a) (b) |
Body segmented Males and females distinct |
Annelida |
2. | Salamandra | (a) (b) |
A tympanum represents ear Fertilization is external |
Amphibia |
3. | Pteropus | (a) (b) |
Skin possesses hair Oviparous |
Mammalia |
4. | Aurelia | (a) (b) |
Cnidoblasts Organ level of organization |
Coelenterata |
Identify the chordates in which the notochord persists in the adults?
1. | Tunicates | 2. | Lancelets |
3. | Cyclostomata | 4. | Bony fishes |
Cyclostomes:
1. are fresh water organisms that move to marine water for spawning
2. have an open circulatory system
3. have a sucking and circular mouth without jaws
4. do not have either scales on body or paired fins
The genital pouch in female cockroach is formed by:
1. 7th, 8th and 9th tergites
2. 7th, 8th and 9th sternites
3. 8th, 9th and 10th tergites
4. 8th, 9th and 10th sternites
A person Iikey to develop tetanus is immunized administering
1. Dead germs
2. Preformed antibodies
3. Wide spectrum antibiotics
4. weakened germs
Main objective of production / use of herbicide resistant GM crops is to
1. Encourage eco-friendly herbicides
2. Reduce herbicide accumulation in food articles for health safety
3. Eliminate weeds from the fields without the use of manual labour
4. Eliminate weeds from the fields without the use of herbicides
Which one of the following techniques made it possible to genetically engineer living organisms?
1. Recombinant DNA techniques
2. X-ray diffraction
3. Heavier isotope labeling
4. Hybridization
A tumor that invades surrounding tissues is usually capable of producing metastases, may recur after attempted removal, and is likely to cause death unless adequately treated. Such a tumor is called a:
1. | Benign tumor | 2. | Malignant tumor |
3. | Teratoma | 4. | Secondary tumor |
Match each item in Column I with one in Column II and select the answer from the codes given below:
COLUMN I |
COULMN II |
||
A |
Bioprospecting |
a |
the process of discovery and commercialization of new products based on biological resources |
B |
Biopiracy |
b |
the exploitative patenting of already widely used natural resources, such as plant varieties, by commercial entities |
C |
Bioremediation |
c |
a process that uses microorganisms or their enzymes to treat polluted sites for regaining their original condition |
D |
Biofortification |
d |
the process by which the nutritional quality of food crops is improved through agronomic practices, conventional plant breeding, or modern biotechnology |
Codes
Options: | A | B | C | D |
1. | a | b | c | d |
2. | a | b | d | c |
3. | b | a | c | d |
4. | b | a | d | c |
The construction of first rDNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native plasmid of:
1. | Salmonella typhimurium | 2. | Escherechia coli |
3. | Agrobacterium tumefaciens | 4. | Haemophilus influenzae |
The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
Nissl bodies are mainly composed of
1. Nucleic acids and SER
2. DNA and RNA
3. Proteins and lipids
4. Free ribosomes and RER
Calcium is important in skeletal muscle contraction because it
1. Detaches the myosin head from the actin filament
2. Activates the myosin ATPase by binding on it
3. Binds to troponin to remove the masking of active sites on actin for myosin
4. Prevents the formation of bonds between the myosin cross bridges and the actin filament
All the following are common second messengers involved in hormonal actions except:
1. Cyclic adenosine monophosphate
2. Inositol phosphate
3. Prostaglandins
4. Calcium
The peak levels of LH and FSH are observed on day _____ of a typical menstrual cycle.
1. | 6 | 2. | 14 |
3. | 22 | 4. | 28 |
Which of the following STIs is not caused by a virus?
1. | Genital herpes | 2. | Genital warts |
3. | HIV | 4. | Syphilis |
After implantation, finger like projections appear on the trophoblast cells called:
1. | Chorionic villi | 2. | Allantois |
3. | Decidua | 4. | Sinusoids |
Consider the two statements:
I: | Electric synapses are rare in our system. |
II: | Impulse transmission across electric synapse is always faster than across a chemical synapse. |
1. Both I and II are correct and II explains I
2. Both I and II are correct and II does not explain I
3. Only I is correct
4. Only II is correct
What would be true for the cells shown in the given diagram?
1. A is involved in gestation and B in olfaction 2. A is a part of sympathetic and B of parasympathetic division of ANS 3. A secretes myelin sheath around axons in CNS while B does it in PNS 4. A is responsible for scotopic vision and B is responsible for photopic vision |
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 |
Which of the given three layers in the respiratory membrane is/are one-celled thick?
I. Alveolar epithelium
II. Basement substance
III. Vascular endothelium
1. | Only I | 2. | Only I and II |
3. | Only I and III | 4. | I, II and III |
Presence of ketonuria and glycosuria is indicative of:
1. Renal failure | 2. Diabetes mellitus |
3. Nephrotic syndrome | 4. Renal stones |
In hemodialysis, the role of artificial kidney is actually played by:
1. | Dialysate | 2. | Blood pump |
3. | Water system | 4. | Cellulose membrane |
The total number of phalanges in the human body are:
1. | 14 | 2. | 28 |
3. | 56 | 4. | 7 |
The gross calorific value for carbohydrates is:
1. 4.0 kcal/g
2. 4.1 kcal/g
3. 5.65 kcal/g
4. 9.45 kcal/g
In Which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
1. GIFT and ZIFT
2. ICSI and ZIFT
3. GIFT and ICSI
4. ZIFT and IUT
Goblet cells of alimentary canal are modified from:
1. Columnar epithelial cells
2. Chondrocytes
3. Compound epithelial cells
4. Squamous epithelial cells
Select the correct statement.
1. Glucagon is associated with hypoglycemia.
2. Insulin acts on pancreatic cells and adipocytes.
3. Insulin is associated with hyperglycemia.
4. Glucocorticoids stimulate gluconeogenesis.
Identify the substances having a glycosidic bond and peptide bond, respectively in their structure:
1. | Glycerol, trypsin | 2. | Cellulose, lecithin |
3. | Inulin, insulin | 4. | Chitin, cholesterol |
The intrinsic factor that helps in the absorption of vitamin is secreted by-
1. Goblet cells
2. Hepatic cells
3. Oxyntic cells
4. Chief cells
The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of forced inspiration. This includes :
(1) RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV
(2) RV; ERV; IC and EC
(3) RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity)
(4) RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
The increase in osmolarity from outer to inner medullary interstitium is maintained due to:
(i) Close proximity between Henle's loop and vasa recta
(ii) Counter current mechanism
(iii) Selective secretion of HCO3- and hydrogen ions in PCT
(iv) Higher blood pressure in glomerular capillaries
1. | Only(ii) | 2. | (iii) and (iv) |
3. | (i), (ii) and (iii) | 4. | (i) and (ii) |
Which of the following is associated with a decrease in cardiac output?
1. Sympathetic nerves
2. Parasympathetic neural signals
3. Pneumotaxic center
4. Adrenal medullary hormones
Which part of the ovary in mammals acts as an endocrine gland after ovulation?
1. | Graafian follicle | 2. | Stroma |
3. | Germinal epithelium | 4. | Vitelline membrane |
The living state can be best described as a:
1. non equilibrium steady state
2. non equilibrium non steady state
3. equilibrium non steady state
4. equilibrium steady state
An antibiotic resistance gene in a vector usually helps in the selection of:
1. Competent bacterial cells
2. Transformed bacterial cells
3. Recombinant bacterial cells
4. None of the above
B cells:
1. | Do not produce antibodies but help T cells produce them |
2. | Are pathogen specific but do not retain the memory of previous encounters |
3. | Lack ability to distinguish between self and non-self |
4. | Are involved in humoral immune response |
Consider the following statements regarding inbreeding in animal husbandry:
I. | Inbreeding refers to the mating of more closely related individuals within the same breed for 4-6 generations. |
II. | Inbreeding increases homozygosity and is necessary if we want to evolve a pure line in any animal. |
III. | Inbreeding exposes harmful recessive genes that are eliminated by selection and helps in the accumulation of superior genes. |
IV. | Continued inbreeding usually reduces fertility and even productivity, called inbreeding depression, which can be overcome by mating selected animals of the breeding population with unrelated superior animals of the same breed. |
The correct statements are:
1. | I, II and III only | 2. | II, III and IV only |
3. | I, II and IV only | 4. | I, II, III and IV |
The number of individuals expressing the dominant phenotype in a population of 200 is 182. What is the frequency of the dominant allele in this population?
1. | 9 % | 2. | 30 % |
3. | 91 % | 4. | 70 % |
In Darwinian terms “fitness” can best be described as:
1. ability of organism, relative to others in the population, to pass its genes to next generation
2. the number of mates the organism has during its life time
3. its lifespan
4. its physical vigor
What causes the ‘struggle for existence?
1. | overproduction and imbalance with available resources |
2. | innate competitive tendencies |
3. | the decrease in the environmental carrying capacity |
4. | territories and dominance hierarchies |
Capacitation refers to change in the
1. Sperm before fertilisation
2. Ovum before fertilisation
3. Ovum after fertilisation
4. Sperm after fertilisation
ADH and oxytocin are synthesized by:
1. Anterior pituitary | 2. Hypothalamus |
3. Pars intermedia | 4. Pars nervosa |
Unmyelinated neurons:
1. are surrounded by Schwann cells and a discontinuous myelin sheath
2. are surrounded by Schwann cells that do not secrete a myelin sheath
3. are not surrounded by Schwann cells or a myelin sheath
4. are surrounded by a discontinuous myelin sheath but no Schwann cells
What would be true for the white blood cell shown in the given diagram?
1. They differentiate into phagocytic cells
2. They secrete histamine and heparin in the blood
3. They are responsible for providing adaptive immunity in vertebrates
4. Their number is increased in acute bacterial infections
Which of the following is a paired cranial bone?
1. | Ethmoid | 2. | Temporal |
3. | Sphenoid | 4. | Occipital |
What amount of carbon dioxide is delivered by every 100 ml of deoxygenated blood at the alveoli under normal physiological conditions?
1. 4 ml | 2. 5 ml |
3. 15 ml | 4. 20 ml |
Variations caused by mutation, as proposed by Hugo de Vries, are:
1. small and directionless
2. random and directional
3. random and directionless
4. small and directional