Biology 1 - Section A
1. When “sticky ends” are paired, they can be joined by:
1. |
restriction enzymes |
2. |
polymerases |
3. |
methylase |
4. |
DNA ligase |
2. Consider the given two statements:
Assertion (A): |
The use of pathogens like baculoviruses as biocontrol agent in ecologically sensitive areas should be avoided. |
Reason (R): |
Baculoviruses are broad spectrum general insecticides. |
1. |
Both (A) and (R) are true and (R) correctly explains the (A). |
2. |
(A) is True; (R) is False |
3. |
(A) is False; (R) is False |
4. |
Both (A) and (R) are True but (R) does not correctly explain the (A). |
3. The cell mediated immune response:
I: |
is mediated by T lymphocytes. |
II: |
produces more antibodies than in the humoral immune response. |
III: |
is characterised by memory. |
IV: |
is responsible for graft rejections. |
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
4. The first type II restriction endonuclease whose functioning depended on a specific DNA nucleotide sequence was:
1. |
EcoRI |
2. |
HindII |
3. |
SmaI |
4. |
BamHI |
5. What is not correct regarding the pathogenesis of AIDS in humans?
I: |
HIV first enters into the macrophages. |
II: |
Macrophages are used by HIV as a factory to produce more virus particles. |
III: |
The viral cDNA does not get integrated into any cells in the human body. |
IV: |
HIV also enters the T-helper cells and destroys them. |
V: |
The anti-retroviral treatment for AIDS is completely curative. |
1. |
All except V |
2. |
Only III and V |
3. |
Only I, III and IV |
4. |
All |
6. 'Restriction' in Restriction enzyme refers to:
1. |
Cleaving of the phosphodiester bonds in DNA by the enzyme |
2. |
Cutting of DNA at a specific position only |
3. |
Prevention of the multiplication of bacteriophage by the host bacteria |
4. |
All of the above |
7. Antibodies present in colostrum protects the newborn from certain diseases which are of:
1. |
Ig G type |
2. |
Ig A type |
3. |
Ig D type |
4. |
Ig E type |
8. For the multiplication of any alien piece of DNA in an organism, it needs to be part of a chromosome that has a specific:
1. |
Telomeric sequence |
2. |
Multiple cloning sites |
3. |
Ori |
4. |
Selectable marker |
9. Diseases are broadly grouped into infectious and non-infectious diseases. In the list given below, identify the infectious diseases.
i. |
Cancer |
ii. |
Influenza |
iii. |
Allergy |
iv. |
Smallpox |
Options:
1. |
i and ii |
2. |
ii and iii |
3. |
iii and iv |
4. |
ii and iv |
10. Recombinant vaccine used to prevent Hepatitis B contains:
1. killed hepatitis B virus
2. live attenuated hepatitis B virus
3. antigenic polypeptide of hepatitis B virus
4. messenger RNA of yeast
11. The sporozoites that cause infection when a female Anopheles mosquito bites a person, are found in:
1. liver of the person
2. RBCs of mosquito
3. salivary glands of the mosquito
4. gut of the mosquito
12. The most commonly used biological pesticide worldwide is:
1. Agrobacterium tumefaciens
2. Pseudomonas putida
3. Bacillus thuringiensis
4. Trichoderma harzianum
13. Given below are two statements : one is labelled as Assertion
(A) and the other is labelled as Reason
(R).
Assertion (A): |
The organic farmer holds the view that the eradication of the creatures that are often described as pests is undesirable. |
Reason (R): |
The eradication of the creatures that are often described as pests is not possible. |
Choose the most appropriate answer:
1. |
(A) is true but (R) is false. |
2. |
Both (A) and (R) are true and (R) correctly explains (A). |
3. |
Both (A) and (R) are true but (R) does not correctly explain (A). |
4. |
Both (A) and (R) are false. |
14. Consider the given two statements:
Assertion (A): |
Cyclosporin A is used as an immunosuppressive agent in organ-transplant patients. |
Reason (R): |
Cyclosporin A is a bioactive molecule produced by the fungus Trichoderma polysporum. |
1. |
Both (A) and (R) are True and (R) correctly explains the (A). |
2. |
(A) is True; (R) is False |
3. |
(A) is False; (R) is False |
4. |
Both (A) and (R) are True but (R) does not correctly explain the (A). |
15. The virus shown here is a causative agent of:
|
1. |
Intestinal infections |
2. |
Respiratory infections |
3. |
CNS infections |
4. |
Genito-urinary infections |
|
16. Mycorrhiza does not help the host plant in:
1. |
Enhancing its phosphorus uptake capacity |
2. |
Increasing its tolerance to drought |
3. |
Enhancing its resistance to root pathogens |
4. |
Increasing its resistance to insects |
17. Biogas is a mixture of:
1. Methane, Carbon dioxide, and Hydrogen sulfide
2. Methane, Carbon dioxide, and Ammonia
3. Methane, Ammonia, and Hydrogen sulfide
4. Ammonia, Carbon dioxide, and Hydrogen sulfide
Biology 1 - Section B
18. A cloning vector must:
1. |
be able to maintain a very high copy numbers of their genome in the host cells |
2. |
contain elements such as promoter and ribosome binding sites |
3. |
be engineered to carry a large number of recognition sequences for common restriction enzymes |
4. |
be able to replicate within host cell independent of the control of chromosomal DNA |
19. What is true about the steps of PCR shown in the diagram given below?
I. |
Step A occurs at the temperature of 95 – 980 C |
II. |
Step B occurs at the temperature of 550 C |
III. |
Step C occurs at the temperature of 720 C |
1. |
I and II only |
2. |
I and III only |
3. |
II and III only |
4. |
I, II and III |
20. Identify the correct statements:
I: |
ADA deficiency is caused due to the deletion of the gene for adenosine deaminase. |
II: |
Bone marrow transplant and enzyme replacement therapy are completely curative. |
III. |
Lymphocytes transformed with cADA gene are permanent cure for the condition. |
1. |
Only I and II |
2. |
Only I |
3. |
Only II and III |
4. |
I, II and III |
21. Given below are two statements : one is labelled as Assertion
(A) and the other is labelled as Reason
(R).
Assertion (A): |
Bioreactors are important in biotechnology procedures to obtain desired products. |
Reason (R): |
Bioreactor provides the optimal conditions for achieving the desired product by providing optimum growth conditions |
In the light of the above statements, choose the most appropriate answer from the options given below :
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. |
22. Corn borer can be controlled by the proteins encoded by Bacillus thuringiensis gene:
1. |
cryIAb |
2. |
cryIAc |
3. |
cryIIAb |
4. |
cryIIIAc |
23. Transgenic animals are the animals that:
1. |
have had their DNA manipulated to possess and express an extra [foreign] gene. |
2. |
are genetically modified with the use of foreign genes from a sexually compatible donor organism. |
3. |
are produced by interspecific hybridisation. |
4. |
are produced by inbreeding. |
24. The critical research areas of biotechnology include all the following except:
1. |
Providing the best catalyst in the form of improved organism usually a microbe or pure enzyme. |
2. |
Creating optimal conditions through engineering for a catalyst to act. |
3. |
Downstream processing technologies to purify the protein/organic compound. |
4. |
Development of new genetically modified microbes that can be used as bio-weapons. |
25. C-peptide of human insulin is:
1. |
A part of mature insulin molecule |
2. |
Responsible for formation of disulphide bridges |
3. |
Removed during maturation of pro-insulin to insulin |
4. |
Responsible for its biological activity |
Biology 2 - Section A
26. Consider three sample areas with the following composition:
Sample area I: |
has three species of birds, two are represented by one individual each and the third by four individuals |
Sample area II: |
has three species of birds, each represented by two individuals |
Sample area III: |
has a species of insects, a species of mammals and a species of birds, each with two individuals |
Which area will be considered as the most diverse?
1. Sample area I
2. Sample area II
3. Sample area III
4. Sample area II and Sample area III are equally diverse
27. The given pyramid of biomass shows a sharp decrease in biomass at higher trophic levels. What can be the reason for this sharp decrease?
I: |
The respiration cost increases sharply along successive higher trophic levels. |
II: |
There can be lower amounts of biomass at the bottom of the pyramid if the rate of primary production per unit biomass is high. |
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. |
28. Consider the two statements:
I: |
Haemoglobin in humans adapted to very high altitudes has a lower binding affinity for oxygen than that found in humans living at the sea level. |
II: |
Lower affinity of haemoglobin to oxygen means more oxygen can bind to haemoglobin even at low partial pressures |
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. |
Both I and II are incorrect |
29. The following image represents what type of population:
1. |
Finite Population |
2. |
Declining Population |
3. |
Stabilising Population |
4. |
Expanding Population |
30. Of the total cost of various ecosystem services, the cost of climate regulation and habitat for wildlife is about:
1. 6 %
2. 10 %
3. 12 %
5. 50 %
31. The monarch butterfly acquires distasteful toxin during:
1. |
Caterpillar stage by feeding on a poisonous weed |
2. |
Caterpillar stage by feeding on sap of a grass |
3. |
Adult stage by feeding on nectar of a flowering plant |
4. |
Adult stage by feeding on latex of deadly night shade plant |
32. The tiger census in our national parks and tiger reserves is often based on:
1. |
Pug marks |
2. |
Cub count |
3. |
Area allocation |
4. |
Collar position |
33. Identify the correct statements:
I. |
Ramdeo Misra is revered as the Father of Ecology in India. |
II. |
Ecology studies the interactions among organisms and between the organism and its physical [abiotic] environment. |
III. |
The study of Ecology begins at cellular biological organisation level. |
IV. |
Ecology at the organism level is essentially physiological ecology. |
1. | Only I and II | 2. | All except III |
3. | Only II, III and III | 4. | I, II, III and IV |
34. The Amazon Forest:
I: |
is a largely tropical rainforest in South Africa |
II: |
has the greatest biodiversity on Earth |
III: |
produces about 20% of total oxygen in the earth’s atmosphere through photosynthesis |
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 |
35. 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
|
36. Given below are two statements : one is labelled as Assertion
(A) and the other is labelled as Reason
(R).
Assertion (A): |
The current mass extinction is different from the previous episodes of mass extinctions. |
Reason (R): |
It is happening at a faster rate and is mainly anthropogenic in nature. |
In the light of the above statements, choose the most appropriate answer from the options given below :
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. |
37. In mycorrhiza, the fungi help the plant in:
1. Synthesis of high energy carbohydrates
2. Absorption of essential nutrients from the soil
3. Nitrogen fixation
4. Biocontrol of pathogens
38. In a terrestrial ecosystem, a much larger fraction of energy flows through the:
1. | DFC | 2. | GFC |
3. | Either of DFC or GFC | 4. | Nither of DFC nor GFC
|
39. If you draw the age pyramid for a population that is expanding in size, you would expect that:
1. |
the number of individuals in the pre-reproductive age group are more than the number of individuals in the reproductive age group. |
2. |
the number of individuals in the reproductive age group are less than the number of individuals in the post-reproductive age group. |
3. |
the number of individuals in the reproductive age group are equal to the number of individuals in the reproductive age group. |
4. |
the number of individuals in the pre-reproductive age group are less than the number of individuals in the reproductive age group. |
40. Given below are two statements : one is labelled as Assertion
(A) and the other is labelled as Reason
(R).
Assertion (A): |
Most ecosystems would vanish if the sun were not, continuously, providing energy to the Earth. |
Reason (R): |
Ecosystems and living organisms defy second law of thermodynamics. |
In the light of the above statements, choose the most appropriate answer from the options given below :
1. |
Both (A) and (R) are True but (R) does not explain (A). |
2. |
(A) is True but (R) is False. |
3. |
(A) is False but (R) is True. |
4. |
Both (A) and (R) are True and (R) explains (A). |
41. If we consider invertebrates, the maximum global biodiversity, after insects, is seen in:
1. |
Crustaceans |
2. |
Echinoderms |
3. |
Mollusks |
4. |
Annelids |
42. Darwinian fitness is represented by:
1. |
Low r value |
2. |
High r value |
3. |
High K value |
4. |
Low K value |
Biology 2 - Section B
43. Consider the given statements:
I: |
Griffith discovered the process of bacterial transformation. |
II: |
Hershey and Chase unequivocally proved that DNA is the genetic material. |
III: |
Meselson and Stahl showed that DNA replicated semi-conservatively. |
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 |
44. During post-transcriptional modification of hnRNA in eukaryotes:
I: |
Capping is done at the 5’ end and tailing at the 3’ end |
II: |
Exons are removed from the split gene to form the cistron |
1. |
Only I is correct |
2. |
Only II is correct |
3. |
Both I and II are correct |
4. |
Both I and II are incorrect |
45. What percent of earth’s area is covered by hotspots of biodiversity?
1. | less than 2 | 2. | about 7 |
3. | about 11 | 4. | more than 16
|
46. Lantana camara and Clarias gariepinus are examples of:
1. |
Invasive species |
2. |
Apex predators |
3. |
Critical link species |
4. |
Edge species |
47. Radiatively active gases do not include:
1. Methane
2. Ammonia
3. Nitrous oxide
4. Chloroflouro carbons
48. Provided it is carried out in an environmentally friendly manner, the only solution for the treatment of e-waste is:
1. Recycling
2. Incineration
3. Sanitary landfills
4. Burying deep in earth
49. Epigynous flower having capitulum inflorescence with involucre of bracts having ray florets and disc florets is found in the family:
1. Compositae
2. Cruciferae
3. Gramineae
4. Solanaceae
50. In a water body polluted with biodegradable organic compounds,
1. the BOD and DO content are low
2. the BOD and DO content are high
3. the BOD is low and DO content is high
4. the BOD is high and DO content is low
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