Plasmodesmata are:
1. Connections between adjacent cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
Consider the following statements with respect to the relationship between osmotic pressure and osmotic potential as explained in section 11.2.2 in NCERT
I. Water moves from regions of higher osmotic pressure to regions of lower pressure
II. Osmotic potential is equivalent to osmotic pressure in concept but opposite in sign
The correct statements are:
1. I only
2. II only
3. Both I and II
4. None
Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D:
(A) | (B) | (C) | (D) | |
1. | Denitrification | Ammonification | Plant biomass |
Animal biomass |
2. | Nitrification | Denitrification | Animal biomass |
Plant biomass |
3. | Denitrification | Nitrification | Plant biomass |
Animal biomass |
4. | Nitrification | Ammonification | Animal biomass |
Plant biomass |
In Kranz anatomy, the bundle sheath cells have
1. thick walls, many intercellular spaces and few chloroplasts
2. thin walls, many intercellular spaces and no chloroplasts
3. thick walls, no intercellular spaces and large number of chloroplasts
4. thin walls, no intercellular spaces and several chloroplasts
The most common enzyme in the world is:
1. | PEP carboxylase | 2. | Pyruvate dehydrogenase |
3. | RuBisCO | 4. | Collagenase |
After glycolysis, the fate of glucose in the mitochondrial matrix is
1. | oxidation | 2. | reduction |
3. | oxidative decarboxylation | 4. | hydrolysis |
According to NCERT textbook, what is the number of ATP molecules that can be regarded as a net gain during aerobic respiration of one molecule of glucose?
1. 2 | 2. 30 |
3. 36 | 4. 38 |
Unlike a population, an individual has:
1. | Birth and death | 2. | Birth rate |
3. | Death rate | 4. | Sex ratio |
The extinction of passenger pigeons was due to:
1. Increased number of predatory birds
2. Over-exploitation by humans
3. Non-availability of the food.
4. Bird flu virus infection
A population has more young individuals compared to older individuals. What would be the status of the population after some years?
1. It will decline
2. It will stabilize
3. It will increase
4. It will first decline and then stabilize
Methanogens belong to
1. Slime moulds
2. Eubacteria
3. Archaebacteria
4. Dinoflagellates
Identify the incorrectly matched pair:
|
Placentation |
Example |
1. |
Free central |
Dianthus |
2. |
Basal |
Sunflower |
3. |
Axile |
China rose |
4. |
Marginal |
Mustard |
Meiosis occurs in organism during
1. Sexual reproduction
2. Vegetative reproduction
3. Both sexual and vegetative reproduction
4. None of these above
In an inflorescence where flowers are borne laterally in an acropetal succession, the position of the youngest floral bud shall be
1. Proximal
2. Distal
3. Intercalary
4. Any where
Interfascicular cambium and cork cambium are formed due to
1. Cell division
2. Cell differentitation
3. Cell dedifferentiation
4. Redifferentiation
As a group the most extensive metabolic diversity is shown by:
1. Bacteria | 2. Protista |
3. Fungi | 4. Animals |
Which of the following does not belong to the class Pteropsida?
1. | Dryopteris | 2. | Adiantum |
3. | Pteris | 4. | Lycopodium |
Which of the following suffix is used to denote the taxon ‘family’ in taxonomy of plants?
1. | -ae | 2. | -opsida |
3. | -aceae | 4. | -ales |
A genetically engineered microorganism used successfully in bioremediation of oil spills is a species of
1. Bacillus
2. Pseudomonas
3. Trichoderma
4. Xanthomonas
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates:
1. Both of the characters are controlled by more than one gene.
2. The two genes are located on two different chromosomes.
3. Chromosomes failed to separate during meiosis.
4. The two genes are linked and present on the same chromosome.
Even in absence of pollinating agents, seed setting is assured in:
1. | Commelina | 2. | Zostera |
3. | Salvia | 4. | Fig |
In the DNA molecule
1. The proportion of adenine in relation of thymine varies with the organism
2. There are two strands which run antiparallel one in 5’ → 3’ direction and other in 3’ → 5’
3. The total amount of purine nucleotides and pyrimidine nucleotides is not run always equal
4. There are two strands which run paralled in the 5’ → 3’ direction.
During his observation of spermatogenesis in a few insects, Henking found that a nuclear structure was received by 50 % of the sperms. He called this structure as:
1. | X – body | 2. | Y–body |
3. | X – chromosome | 4. | Y – chromosome |
Gene regulation in prokaryotes is carried out exclusively at the level of:
1. | Initiation of transcription |
2. | Post-transcriptional modifications |
3. | Translation |
4. | Post-translational modifications |
In artificial hybridization experiments, if the female plant produces unisexual flowers, emasculation:
1. Must be done before maturity.
2. Must be done after maturity.
3. Must be done at maturity.
4. Is not needed.
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 |
Sickle cell disease is an example of:
1. Sex linked recessive disorder
2. Pleiotropy
3. Polygenic trait
4. Sex influenced trait
The salient features of the human genome include all except:
1. About 1.4 million SNP locations
2. Functions known for less than 50% of the discovered genes
3. The actual number of genes and the initial estimates are remarkable similar
4. More than 98% of genome does not code for proteins
The part of the complex stomach of ruminants that has methanogens present is the:
1. | Omassum | 2. | Abomasum |
3. | Rumen | 4. | Reticulum |
During meiosis, the bivalent chromosomes clearly appear as tetrads first at:
1. | Zygotene of Prophase I | 2. | Pachytene of Prophase I |
3. | Metaphase I | 4. | Anaphase I |
In animal cells, steroidal hormones are synthesized in the:
1. | Rough endoplasmic reticulum |
2. | Smooth endoplasmic reticulum |
3. | Golgi apparatus |
4. | Lysosomes |
The concept of "Omnis cellula-e-cellula" regarding cell division was first proposed by:
1. | Aristotle | 2. | Rudolf Virchow |
3. | Theodore Schwann | 4. | Schleiden |
In the polynucleotide chain of DNA, a nitrogenous base is linked to the –OH of:
(1) 2'C pentose sugar
(2) 3'C pentose sugar
(3) 5'C pentose sugar
(4) 1'C pentose sugar
Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:
1. | Anaphase | 2. | Telophase |
3. | Prophase | 4. | Metaphase |
Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
1. Gibberellic acid
2. Nitrate
3. Ascorbic acid
4. Chilling conditions
During the process of ecological succession, the changes that take place in communities are :
1. Orderly and sequential
2. Random
3. Very quick
4. Not influenced by the physical environment
Which one is correctly matched
1. Rhinoceros – Kaziranga National Park
2. Great Indian Bustard–Keoladeo National Park
3. Lion–Corbett national Park
4. Wild Ass – Dudhwa National Park
Which one of the following is mismatched?
1. Fossil fuel burning - Release of
2. Nuclear power - Radioactive wastes
3. Solar energy - Green house effect
4. Biomass burning - Release of
Match the following and choose the correct option.
Column I | Column II | ||
A. | Environment Protection Act | i. | 1974 |
B. | Air prevention & Control of pollution Act | ii. | 1987 |
C. | Water act | iii. | 1986 |
D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
The correct match is :
Options: | A | B | C | D |
1. | iii | iv | i | ii |
2. | i | iii | ii | iv |
3. | iv | i | ii | iii |
4. | iii | iv | ii | i |
Select the correct statement from the following regarding cell membrane:
1. Na+ and K+ ions move across cell membrane by passive transport
2. Proteins make up 60% to 70% of the cell membrane
3. Lipids are arranged in a bilayer with polar heads towards the inner part
4. Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
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 |
Consider the given two statements:
I. | Morphology of chromosomes is best studied at metaphase |
II. | At this stage, a chromosome is made up of two sister chromatids, held together at the centromere |
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. I is false but II is true
Monoecious plant of Chara shows the occurrence of:
1. | Upper oogonium and lower antheridium on the same plant |
2. | Antheridiophore and archegoniophore on the same plant |
3. | Stamen and carpel on the same plant |
4. | Upper antheridium and lower oogonium on the same plant |
Genetic map is one that
1. Establishes sites of the gene on a chromosome
2. Establishes the various stages in gene evolution
3. Shows the stages during cell division
4. Shows distribution of various species in a region
Which one of the following conditions correctly describe the manner of determining the sex in the given example?
1. | Homozygous sex chromosomes (ZZ) determine the female sex in birds. |
2. | XO type of sex chromosomes determine male sex in grasshopper |
3. | XO condition in humans as found in Turner Syndrome, determines female sex. |
4. | Homozygous sex chromosomes (XX) produce males in Drosophila. |
A diploid female plant is crossed with a tetraploid male. The ploidy of endosperm will be:
1. | Tetraploidy | 2. | Pentaploidy |
3. | Triploidy | 4. | Diploidy |
Which one of the following statements is not true?
1. | Stored pollen in liquid nitrogen can be used in the crop breeding programmes. |
2. | Tapetum helps in the dehiscence of anther. |
3. | Exine of pollen grains is made up of sporopollenin. |
4. | Pollen grains of many species cause severe allergies. |
Frederick Griffith discovered:
1. | DNA is the genetic material |
2. | RNA can be the genetic material |
3. | Streptococcus has two strains |
4. | Bacterial transformation |
In eukaryotes, the sequences that appear in mature or processed mRNA are called:
1. | Introns | 2. | Cistrons |
3. | Exons | 4. | Mutons |
The plantlets produced during plant tissue culture are called somaclones because:
1. | They can be produced in a very short span of time |
2. | They are the result of the somatic hybridization of two cells |
3. | The gametes develop parthenogenetically to produce genetically identical plantlets |
4. | They are genetically identical to the original plant from which they were grown |
Match the source gland with its respective hormone as well as the function.
Source gland | Hormone | Function | |
1. | Posterior pituitary | Vasopressin | Stimulates resorption of water in the distal tubules in nephron |
2. | Corpus luteum | Oestrogen | Supports pregnancy |
3. | Thyroid | Thyroxine | Regulates blood calcium level |
4. | Anterior pituitary | Oxytocin | Contraction of uterus muscles during child birth |
Which of the following events is not associated with ovulation in human female?
1. Decrease in oestradiol
2. Full development of Graafian follicle
3. Release of secondary oocyte
4. LH surge
Oxygen binding to haemoglobin in blood is
1. directly proportional to the concentration of in the medium
2. inversely proportional to the concentration of in the medium
3. directly proportional to the concentration of CO in the medium
4. independent of the concentration of CO in the medium
Uricotelic mode of passing out nitrogenous wastes is found in
1. reptiles and bird | 2. birds and annelids |
3. amphibians and reptiles | 4. insects and amphibians |
Radially symmetrical animals:
1. Are all triploblastic
2. Tend to be sessile and passively floating
3. Have a definite head and a brain
4. Have an anterior and a posterior end
All the following are features of non chordates except:
1. A dorsal heart, if present
2. Ventral, solid and double central nervous system
3. Absence of gill slits
4. Post anal tail
A pair of walking legs in cockroach is borne by:
1. The first two thoracic segments only
2. Each thoracic segment
3. The 2nd and 3rd thoracic and first abdominal segments
4. The abdominal segments
Which one of the following is the correct statement regarding the particular psychotropic drug specified?
1. Morphine leads to delusions and disturbed emotions
2. Barbiturates cause relaxation and temporary euphoria
3. Hashish causes after thought perceptions and hallucinations
4. Opium stimulates nervous system and causes hallucinations
Cry 1 endotoxins obtained from Bacillus thuringiensis are effective against
1. Nematodes
2. Mosquitoes
3. Bollworms
4. Flies
There is a restriction endonuclease called EcoRI. What does ‘co’ part in it stand for?
1. Colon
2. Coelom
3. Coenzyme
4. coli
Which of the following is not a documented effect of alcoholism?
1. | intrauterine growth retardation in the fetus if the pregnant female consumes alcohol |
2. | cirrhosis of liver secondary to fatty deposition in the liver |
3. | an increase in the secretion of ADH by the supraoptic nucleus leading to retention of urine |
4. | gastritis and pancreatitis |
Electroporation is:
1. | the process of separating charged molecules through a gel maintained in an electric field |
2. | the process of combining foreign DNA to an electrically charged vector molecule |
3. | the process of introducing DNA into cells by the application of high-voltage pulses |
4. | the process of protoplast fusion by the application of high-voltage pulses |
A piece of DNA, somehow transferred into an alien organism, will be able to multiply itself in the progeny cells of organism if:
1. | It includes the centromere |
2. | It becomes a part of chromosome |
3. | It does not contain any intron sequences |
4. | It is a single stranded polynucleotide |
Which of the following terms describe human dentition?
1. Pleurodont, Monophyodont, Homodont
2. Thecodont, Diphyodont, Heterodont
3. Thecodont, Diphyodont, Homodont
4. Pleurodont, Diphyodont, Heterodont
Match the items given in Column I with those in Column II and select the correct option given below:
Column – I | Column – II | ||
(a) | Tricuspid valve | (i) | Between left atrium and left ventricle |
(b) | Bicuspid valve | (ii) | Between right ventricle and pulmonary artery |
(c) | Semilunar valve | (iii) | Between right atrium and right ventricle |
Codes:
(a) | (b) | (c) | |
1. | (i) | (ii) | (iii) |
2. | (i) | (iii) | (ii) |
3. | (iii) | (i) | (ii) |
4. | (ii) | (i) | (iii) |
Identify the structure of the amino acid that is a Zwitter ion :
1. | 2. | ||
3. | 4. |
The transparent lens in the human eye is held in its place by
1. Smooth muscles attached to the iris.
2. Ligaments attached to the iris.
3. Ligaments attached to the ciliary body.
4. Smooth muscles attached to the ciliary body.
Osteoporosis, an age related disease of skeletal system, may occur due to
1. High concentration of Ca++ and Na+
2. Decrease level of estrogen
3. Accumulation of uric acid leading to inflammation of joints
4. Immune disorder affecting neuromuscular junction leading to fatigue
Match the items given in column I with those in column II and select the correct option below:
Column I (Function) |
Column II (Part of Excretory system) |
||
(a) |
Ultrafiltration |
(i) |
Henle’s loop |
(b) |
Concentration of urine |
(ii) |
Ureter |
(c) |
Transport of urine |
(iii) |
Urinary bladder |
(d) |
Storage of urine |
(iv) |
Malpighian corpuscle |
(v) |
Proximal convoluted tubule |
Codes:
(a) (b) (c) (d)
1. (v) (iv) (i) (ii)
2. (iv) (i) (ii) (iii)
3. (iv) (v) (ii) (iii)
4. (v) (iv) (i) (iii)
The hormones of ‘flight or fight’ response:
1. are secreted by the zona glomerulosa of adrenal cortex
2. are commonly called as catecholamines
3. are released slowly over a period of time when required
4. do not act via a second messenger system
What prevents the back flow of faeces from caecum into the small intestine?
1. ileo-caecal valve
2. ileo-caecal sphincter
3. vermiform appendix
4. taenia coli muscle
Consider the following two statements:
I: | Not all copulations lead to fertilization and pregnancy |
II: | Fertilization can occur if the ovum and the sperms are simultaneously transported to the fallopian tubes. |
1. Both I and II are correct and II correctly 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 ideal contraceptive for females who want to delay pregnancy and/or space children is:
1. Barrier contraceptive
2. Periodic abstinence
3. IUD
4. Hormonal pills
The signals of fetal ejection reflex originate from:
1. Maternal pituitary
2. Maternal hypothalamus
3. Fully developed fetus and placenta
4. Fetal pituitary
Under normal conditions, almost all the energy used by the brain cells is supplied by:
1. The free fatty acids in the blood
2. Glucose derived from the blood
3. Gluconeogenesis in glial cells
4. Breakdown of muscle glycogen
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. |
Utricle |
a. |
linear acceleration of the head in the vertical plane |
B. |
Saccule |
b. |
linear acceleration of the head in the horizontal plane |
C. |
Cochlea |
c. |
detects rotation of head |
D. |
Semicircular canals |
d. |
Hearing |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | d | c |
3. | b | a | c | d |
4. | a | b | d | c |
Normal activities of the heart are regulated:
1. intrinsically
2. by adrenal medullary hormones
3. by sympathetic nervous system
4. by parasympathetic nervous system
When carbon dioxide combines with haemoglobin in blood, it forms:
1. | Carboxyhemoglobin | 2. | Carbaminohemoglobin |
3. | Methemoglobin | 4. | Oxidized hemoglobin |
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 minimum amount of urine output per day required to eliminate the nitrogenous wastes produced during normal metabolism in a day will be:
1. 400 ml
2. 700 ml
3. 1000 ml
4. 1500 ml
The pubic bones, constituent of the coxal bone, are held together ventrally by a:
1. syndesmosis
2. diarthrotic
3. symphysis
4. synchondrosis
Identify the basic amino acid from the following:
1. | Glutamic Acid | 2. | Lysine |
3. | Valine | 4. | Tyrosine |
Match the following columns and select the correct option:-
Column-I Column-II
(a) Pituitary hormone (i) Steroid
(b) Epinephrine (ii) Neuropeptides
(c) Endorphins (iii) Peptides, proteins
(d) Cortisol (iv) Biogenic amines
1. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
3. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
4. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
Which of the following STDs are not curable?
(1) Genital herpes, Hepatitis B, HIV infection
(2) Chlamydiasis, Syphilis, Genital warts
(3) HIV, Gonorrhoea, Trichomoniasis
(4) Gonorrhoea, Trichomoniasis, Hepatitis B
Select the incorrectly matched pair from the following:
1. Chondrocytes - Smooth muscle cells
2. Neurons - Nerve cells
3. Fibroblast - Areolar tissue
4. Osteocytes - Bone cells
Identify the correct statement:
1. In amniotes, last nerve is spinal accessory.
2. In non-amniotes, last nerve is vagus.
3. Optic is shortest nerve.
4. Olfactory nerves have mixed fibres.
Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion
Protein molecules that assist in the proper
folding of other proteins are known as:
1. Ubiquitins
2. Chaperonins
3. Prions
4. Calmodulins
While isolating DNA from bacteria, which of the following enzymes is not required?
1. | Lysozyme | 2. | Ribonuclease |
3. | Deoxyribonuclease | 4. | Protease |
Interferons are secreted by:
1. | Single stranded viruses | 2. | Double stranded viruses |
3. | Bacteria infected cells | 4. | Virus infected cells |
Identify the incorrect statement regarding Multiple Ovulation Embryo Transfer Technology (MOET):
1. | FSH like hormones or PMSG [pregnant mare serum gonadotropin] are used to induce super-ovulation [6 – 8 eggs rather than one per cycle] and Prostaglandins are used to regulate the duration of cycle. |
2. | Fresh embryos can be stored at 37ºC for 6 - 8 hours without much harm but it is recommended that the embryos are inserted into the recipient cow or frozen as soon as possible. The embryos can be stored forever in liquid nitrogen. |
3. | The animal is either mated with an elite bull or artificially inseminated and the fertilised eggs at 8–32 cell stages are recovered non-surgically and transferred to genetic mothers. |
4. | The embryos are transferred to a recipient cow whose oestrous cycle is at the correct receptive stage. |
In modern terms, selection refers to :
1. inheritance of dominant characters
2. differential reproduction
3. a decrease in allele frequency in a population
4. differences in the contribution of various genotypes to the next generation
Lichens are very sensitive to pollution. In England, after the onset of the industrial revolution, the lichens were adversely affected and the frequency of the dark-colored peppered moths increased because they were:
1. protected from carcinogens
2. protected from lichen poisons
3. more robust
4. protected from predation
Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus
Identify the human development stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two together:
Developmental stage |
Site of occurrence |
|
1. |
Blastocyst |
Uterine wall |
2. |
8 cells morula |
Starting point of Fallopian tube |
3. |
Late morula |
Middle part of Fallopian tube |
4. |
Blastula |
End part of Fallopian tube |
The hormone angiotensinogen is produced by:
1. Liver | 2. Kidney |
3. Heart | 4. Pituitary |
Platelets are cell fragments that:
I. are produced from megakaryocytes in the spleen in fetal life
II. can release variety of factors involved in blood coagulation
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Identify the protein that is not associated with others when the skeletal muscle is relaxed:
1. | Actin | 2. | Myosin |
3. | Tropomyosin | 4. | Troponin |
Damage to alveolar walls leading to decrease in respiratory surface is characteristic of:
1. Asthma
2. Pneumoconiosis
3. Emphysema
4. Pneumonitis
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask:
1. | |
2. | |
3. | |
4. |