Q1. Read the following four statements (A-D):
(A) Colostrum is recommended for the new born because it is rich in antigens.
(B) Chikengunya is caused by a Gram negative bacterium.
(C) Tissue culture has proved useful in obtaining virus-free plants.
(D) Beer is manufactured by distillation of fermented grape juice.
How many of the above statements are wrong ?
(A) Colostrum is recommended for the new born because it is rich in antigens.
(B) Chikengunya is caused by a Gram negative bacterium.
(C) Tissue culture has proved useful in obtaining virus-free plants.
(D) Beer is manufactured by distillation of fermented grape juice.
How many of the above statements are wrong ?
Correct Answer: (b)
A (rich in antibodies), B (virus), and D (undistilled) are wrong. Only C is correct.
A (rich in antibodies), B (virus), and D (undistilled) are wrong. Only C is correct.
Q2. Monascus purpureus is a yeast used commercially in the production of :
Correct Answer: (d)
Statins produced by this yeast inhibit the enzyme responsible for cholesterol synthesis.
Statins produced by this yeast inhibit the enzyme responsible for cholesterol synthesis.
Q3. Which one of the following human organs is often called the 'graveyard' of RBCs ?
Correct Answer: (c)
The spleen filters out and destroys old/damaged RBCs.
The spleen filters out and destroys old/damaged RBCs.
Q4. The rate of formation of new organic matter by rabbit in a grassland, is called :
Correct Answer: (b)
Productivity at the consumer level (herbivore) is secondary productivity.
Productivity at the consumer level (herbivore) is secondary productivity.
Q5. Which one of the following organisms is correctly matched with its three characteristics ?
Correct Answer: (c)
Onion (Liliaceae) has bulbs, imbricate petals, and axile placentation.
Onion (Liliaceae) has bulbs, imbricate petals, and axile placentation.
Q6. Which one of the following statements is wrong ?
Correct Answer: (a)
Even if shed at 2-celled stage, the generative cell divides in the pollen tube to enable double fertilization.
Even if shed at 2-celled stage, the generative cell divides in the pollen tube to enable double fertilization.
Q7. Read the following four statements (A-D):
(A) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
(B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
(C) Stamens in flowers of Gloriosa and Petunia are polyandrous.
(D) Symbiotic nitrogen-fixers occur in free-living state also in soil.
How many of the above statements are right ?
(A) Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane.
(B) In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth.
(C) Stamens in flowers of Gloriosa and Petunia are polyandrous.
(D) Symbiotic nitrogen-fixers occur in free-living state also in soil.
How many of the above statements are right ?
Correct Answer: (b)
Statements A, C, and D are correct. Cambium in stems is formed from medullary rays and intrafascicular cambium.
Statements A, C, and D are correct. Cambium in stems is formed from medullary rays and intrafascicular cambium.
Q8. The correct sequence of cell organelles during photorespiration is :
Correct Answer: (d)
Photorespiration occurs in the order: Chloroplast -> Peroxisome -> Mitochondria.
Photorespiration occurs in the order: Chloroplast -> Peroxisome -> Mitochondria.
Q9. Which one of the following characteristics is common both in humans and adult frogs ?
Correct Answer: (d)
Both are ureotelic (excrete urea as primary waste).
Both are ureotelic (excrete urea as primary waste).
Q10. Which one of the following structures is an organelle within an organelle ?
Correct Answer: (a)
Ribosomes are found inside other organelles like Mitochondria and Chloroplasts.
Ribosomes are found inside other organelles like Mitochondria and Chloroplasts.
Q11. Which one of the following statements is correct with respect to immunity ?
Correct Answer: (a)
Treatment for snake bite involves passive immunisation (anti-venom antibodies).
Treatment for snake bite involves passive immunisation (anti-venom antibodies).
Q12. In the five-kingdom classification, Chlamydomonas and Chlorella have been included in :
Correct Answer: (a)
Whittaker placed all unicellular eukaryotes, including these algae, under Protista.
Whittaker placed all unicellular eukaryotes, including these algae, under Protista.
Q13. Read the following five statements (A - E) and answer as asked next to them. (A) In Equisetum the female gametophyte is retained on the parent sporophyte. (B) In Ginkgo male gametophyte is not independent. (C) The sporophyte in Riccia is more developed than that in Polytrichum. (D) Sexual reproduction in Volvox is isogamous. (E) The spores of slime molds lack cell walls. How many of the above statements are correct ?
Correct Answer: (d)
Only statement (B) is correct. In Ginkgo (gymnosperm), the male gametophyte is reduced and dependent.
Only statement (B) is correct. In Ginkgo (gymnosperm), the male gametophyte is reduced and dependent.
Q14. Which one of the following represents a palindromic sequence in DNA ?
Correct Answer: (a)
GAATTC reads the same backward as CTTAAG on the opposite strand (EcoRI site).
GAATTC reads the same backward as CTTAAG on the opposite strand (EcoRI site).
Q15. Which one of the following is correctly matched ?
Correct Answer: (c)
Potassium is highly mobile and easily translocated within plants.
Potassium is highly mobile and easily translocated within plants.
Q16. How many organisms in the list given below are autotrophs ?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
Correct Answer: (c)
Nostoc, Chara, Porphyra, and Wolfia are photoautotrophs. Nitrosomonas and Nitrobacter are chemoautotrophs. Total = 6.
Nostoc, Chara, Porphyra, and Wolfia are photoautotrophs. Nitrosomonas and Nitrobacter are chemoautotrophs. Total = 6.
Q17. In genetic engineering, the antibiotics are used :
Correct Answer: (a)
Antibiotic resistance genes help identify transformants from non-transformants.
Antibiotic resistance genes help identify transformants from non-transformants.
Q18. Signals for parturition originate from :
Correct Answer: (a)
Parturition is triggered by the foetal ejection reflex involving both.
Parturition is triggered by the foetal ejection reflex involving both.
Q19. Cuscuta is an example of :
Correct Answer: (a)
Cuscuta is a total stem parasite that lives on the outside of the host.
Cuscuta is a total stem parasite that lives on the outside of the host.
Q20. Green revolution in India occurred during :
Correct Answer: (a)
The Green Revolution began in the mid-1960s.
The Green Revolution began in the mid-1960s.
Q21. The figure below shows three steps (A,B,C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents ?
Correct Answer: (c)
Step C is the extension phase using Taq polymerase at approx 72C.
Step C is the extension phase using Taq polymerase at approx 72C.
Q22. Which one of the following generally acts as an antagonist to gibberellins ?
Correct Answer: (c)
Abscisic Acid (ABA) acts opposite to Gibberellins in seed dormancy and growth.
Abscisic Acid (ABA) acts opposite to Gibberellins in seed dormancy and growth.
Q23. The second stage of hydrosere is occupied by plants like :
Correct Answer: (d)
Vallisneria is a submerged macrophyte, representing the second stage of hydrarch succession.
Vallisneria is a submerged macrophyte, representing the second stage of hydrarch succession.
Q24. What is the function of germ pore ?
Correct Answer: (c)
The germ pore is the site where the pollen tube emerges from the pollen grain.
The germ pore is the site where the pollen tube emerges from the pollen grain.
Q25. The supportive skeletal structures in the human external ears and in the nose tip are examples of :
Correct Answer: (d)
Elastic cartilage is found in the external ear and nose tip.
Elastic cartilage is found in the external ear and nose tip.
Q26. Which one of the following is a case of wrong matching ?
Correct Answer: (b)
Vector DNA is a vehicle for gene transfer, not a template for tRNA synthesis.
Vector DNA is a vehicle for gene transfer, not a template for tRNA synthesis.
Q27. Which one of the following pairs of, chemical substances, is correctly categorised ?
Correct Answer: (c)
Troponin and myosin are structural/functional proteins in muscle fibers.
Troponin and myosin are structural/functional proteins in muscle fibers.
Q28. Identify the likely organisms (a), (b), (c) and (d) in the food web shown below :
| (a) | (b) | (c) | (d) | |
|---|---|---|---|---|
| (1) | deer | rabbit | frog | rat |
| (2) | dog | squirrel | bat | deer |
| (3) | rat | dog | tortoise | crow |
| (4) | squirrel | cat | rat | pigeon |
Correct Answer: (a)
Typical food web organisms matching the trophic links provided.
Typical food web organisms matching the trophic links provided.
Q29. Identify the human developmental 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) | Late morula | Middle Part of Fallopian tube |
| (2) | Blastula | End part of Fallopian tube |
| (3) | Blastocyst | Uterine wall |
| (4) | 8 - celled morula | Starting point of Fallopian tube |
Correct Answer: (c)
The image shows a Blastocyst, which implants in the uterine wall.
The image shows a Blastocyst, which implants in the uterine wall.
Q30. Read the following four statements (A-D):
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulation.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are right ?
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulation.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are right ?
Correct Answer: (a)
(A) and (D) are correct. Lac operon regulation by repressor is negative regulation.
(A) and (D) are correct. Lac operon regulation by repressor is negative regulation.
Q31. The gynoecium consists of many free pistils in flowers of :
Correct Answer: (d)
Michelia has a multicarpellary apocarpous (free) gynoecium.
Michelia has a multicarpellary apocarpous (free) gynoecium.
Q32. A normal visioned man whose father was colour blind, marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chances that this child would be colour blind ?
Correct Answer: (b)
Man is XY. Woman is a carrier (XcX). Daughter gets one X from father (normal), so she cannot be colorblind.
Man is XY. Woman is a carrier (XcX). Daughter gets one X from father (normal), so she cannot be colorblind.
Q33. In gobar gas, the maximum amount is that of :
Correct Answer: (b)
Biogas/Gobar gas contains 50-70% methane.
Biogas/Gobar gas contains 50-70% methane.
Q34. Vernalisation stimulates flowering in :
Correct Answer: (c)
Carrot is a biennial plant that requires cold treatment (vernalisation) to flower.
Carrot is a biennial plant that requires cold treatment (vernalisation) to flower.
Q35. A fall in glomerular filtration rate (GFR) activates :
Correct Answer: (a)
Low GFR triggers Renin release from the JG cells (RAAS mechanism).
Low GFR triggers Renin release from the JG cells (RAAS mechanism).
Q36. Which one of the following options gives the correct categorisation of six animals according to the type of nitrogenous wastes (A, B, C), they give out ?
| A - AMMONOTELIC | B - UREOTELIC | C - URICOTELIC | |
|---|---|---|---|
| (1) | Pigeon, Humans | Aquatic Amphibia, Lizards | Cockroach, Frog |
| (2) | Frog, Lizards | Aquatic Amphibia, Humans | Cockroach, Pigeon |
| (3) | Aquatic Amphibia | Frog, Humans | Pigeon, Lizards, Cockroach |
| (4) | Aquatic Amphibia | Cockroach, Humans | Frog, Pigeon, Lizards |
Correct Answer: (c)
Correct Match: Aquatic amphibia (NH3), Frog/Humans (Urea), Birds/Lizards/Cockroach (Uric Acid).
Correct Match: Aquatic amphibia (NH3), Frog/Humans (Urea), Birds/Lizards/Cockroach (Uric Acid).
Q37. Which one of the following is not a property of cancerous cells whereas the remaining three are ?
Correct Answer: (d)
Cancer cells lose contact inhibition, which is a property of normal cells.
Cancer cells lose contact inhibition, which is a property of normal cells.
Q38. Plants with ovaries having only one or a few ovules, are generally pollinated by :
Correct Answer: (d)
Wind-pollinated flowers (Anemophily) typically have single ovules in each ovary.
Wind-pollinated flowers (Anemophily) typically have single ovules in each ovary.
Q39. Identify the molecules (a) and (b) shown below and select the right option giving their source and use.
| Molecule | Source | Use | |
|---|---|---|---|
| (1) | (a) Cocaine | Erythroxylum coca | Accelerates dopamine transport |
| (2) | (b) Heroin | Cannabis Sativa | Depressant |
| (3) | (b) Cannabinoid | Atropa belladona | Hallucinations |
| (4) | (a) Morphine | Papaver somniferum | Sedative and pain killer |
Correct Answer: (d)
Molecule (a) is Morphine, derived from Opium Poppy, used as a sedative/analgesic.
Molecule (a) is Morphine, derived from Opium Poppy, used as a sedative/analgesic.
Q40. Through their effect on plant growth regulators, what do the temperature and light control in the plants ?
Correct Answer: (b)
Photoperiodism and Vernalisation control flowering.
Photoperiodism and Vernalisation control flowering.
Q41. As compared to a dicot root, a monocot root has :
Correct Answer: (b)
Monocot roots are polyarch (more than 6 xylem bundles).
Monocot roots are polyarch (more than 6 xylem bundles).
Q42. A test cross is carried out to :
Correct Answer: (a)
A test cross identifies the genotype of an organism showing a dominant phenotype.
A test cross identifies the genotype of an organism showing a dominant phenotype.
Q43. Tobacco plants resistant to a nematode have been developed by the introduction of DNA that produced (in the host cells).
Correct Answer: (a)
RNA interference uses sense and antisense RNA to form dsRNA that silences the nematode mRNA.
RNA interference uses sense and antisense RNA to form dsRNA that silences the nematode mRNA.
Q44. The secretory phase in the human menstrual cycle is also called :
Correct Answer: (c)
The post-ovulatory (secretory/luteal) phase is constant at about 13-14 days.
The post-ovulatory (secretory/luteal) phase is constant at about 13-14 days.
Q45. For its activity, carboxypeptidase requires :
Correct Answer: (a)
Zinc is a metal ion cofactor for the enzyme carboxypeptidase.
Zinc is a metal ion cofactor for the enzyme carboxypeptidase.
Q46. Which one of the following is a wrong statement regarding mutations ?
Correct Answer: (d)
Point mutations (like Sickle cell anemia) are caused by a single base pair change.
Point mutations (like Sickle cell anemia) are caused by a single base pair change.
Q47. Which one of the following does not differ in E.coli and Chlamydomonas ?
Correct Answer: (d)
Basic plasma membrane structure is universal to both prokaryotes and eukaryotes.
Basic plasma membrane structure is universal to both prokaryotes and eukaryotes.
Q48. For its action, nitrogenase requires :
Correct Answer: (a)
Nitrogen fixation is highly energy-intensive, requiring 16 ATP for one N2 molecule.
Nitrogen fixation is highly energy-intensive, requiring 16 ATP for one N2 molecule.
Q49. Which of the following areas in India, is a hotspot of biodiversity ?
Correct Answer: (d)
The Western Ghats are a major biodiversity hotspot in India.
The Western Ghats are a major biodiversity hotspot in India.
Q50. Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D, and select the right option about them.
| Part-A | Part-B | Part-C | Part-D | |
|---|---|---|---|---|
| (1) | Macro-phage | Fibroblast | Collagen fibres | Mast cells |
| (2) | Mast cell | Macro-phage | Fibroblast | Collagen fibres |
| (3) | Macro-phage | Collagen fibres | Fibroblast | Mast cell |
| (4) | Mast cell | Collagen fibres | Fibroblast | Macro-phage |
Correct Answer: (a)
A-Macrophage, B-Fibroblast, C-Collagen fibers, D-Mast cell.
A-Macrophage, B-Fibroblast, C-Collagen fibers, D-Mast cell.
Q51. Sacred groves are specially useful in :
Correct Answer: (d)
Sacred groves act as in-situ conservation centers for rare flora and fauna.
Sacred groves act as in-situ conservation centers for rare flora and fauna.
Q52. The four sketches (A, B, C and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its correct location and function ?
| Tissue | Location | Function | |
|---|---|---|---|
| (1) (B) | Glandular epithelium | Intestine | Secretion |
| (2) (C) | Collagen fibres | Cartilage | Attach skeletal muscles to bones |
| (3) (D) | Smooth muscle tissue | Heart | Heart contraction |
| (4) (A) | Columnar epithelium | Nephron | Secretion and absorption |
Correct Answer: (a)
B is glandular epithelium found in the intestinal lining for secretion.
B is glandular epithelium found in the intestinal lining for secretion.
Q53. The first clinical gene therapy was given for treating :
Correct Answer: (d)
Trial was in 1990 for a girl with SCID caused by ADA deficiency.
Trial was in 1990 for a girl with SCID caused by ADA deficiency.
Q54. How many plants in the list given below have marginal placentation ?
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin
Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin
Correct Answer: (c)
Gram, Arhar, Sunhemp, Moong, Pea, and Lupin (Fabaceae members) have marginal placentation. Total = 6.
Gram, Arhar, Sunhemp, Moong, Pea, and Lupin (Fabaceae members) have marginal placentation. Total = 6.
Q55. Represented below is the inheritance pattern of a certain type of traits in humans. Which one of the following conditions could be an example of this pattern ?
Correct Answer: (c)
The criss-cross pattern shown is typical of X-linked recessive traits like Haemophilia.
The criss-cross pattern shown is typical of X-linked recessive traits like Haemophilia.
Q56. Where do certain symbiotic microorganisms normally occur in human body ?
Correct Answer: (a)
The caecum hosts many symbiotic microbes.
The caecum hosts many symbiotic microbes.
Q57. A patient brought to a hospital with myocardial infarction is normally immediately given :
Correct Answer: (b)
Streptokinase acts as a clot-buster enzyme.
Streptokinase acts as a clot-buster enzyme.
Q58. Biolistics (gene-gun) is suitable for :
Correct Answer: (b)
Biolistics is a direct method to introduce genes into plant cells.
Biolistics is a direct method to introduce genes into plant cells.
Q59. Which one of the following pairs is wrongly matched ?
Correct Answer: (b)
Salvinia is heterosporous and does not produce a typical free-living prothallus like homosporous ferns.
Salvinia is heterosporous and does not produce a typical free-living prothallus like homosporous ferns.
Q60. In which one of the following the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct :
| Genus name | Two characters | Phylum |
|---|---|---|
| (1) Pila | (a) Body Segmented, (b) Mouth with Radual | Mollusca |
| (2) Asterias | (a) Spiny Skinned, (b) Water vascular system | Echinodermata |
| (3) Sycon | (a) Pore bearing, (b) Canal system | Porifera |
| (4) Periplaneta | (a) Jointed appendages, (b) Chitinous exoskeleton | Arthropoda |
Correct Answer: (a)
Pila is a Mollusc but has an unsegmented body.
Pila is a Mollusc but has an unsegmented body.