Biology 1 - Section A
1. Auxins:
I: |
promote flowering in pineapples |
II: |
induce parthenocarpy in tomatoes |
III: |
like 2,4-D kill monocot weeds |
IV: |
control xylem differentiation |
1. Only I and II are correct
2. Only III is incorrect
3. I, II, III and IV are correct
4. Only I and IV are incorrect
2. Consider the two statements:
Assertion(A): |
Apical dominance is most likely adaptive. |
Reason(R): |
It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis. |
1. |
Both (A) and (R) are True and (R) correctly explains (A). |
2. |
Both (A) and (R) are True but (R) does not correctly explain (A). |
3. |
(A) is True; (R) is False. |
4. |
(A) is False; (R) is True. |
3. The number of steps in the Kreb's cycle where oxidative decarboxylation takes place is:
4. The following equation shows the complete oxidation of tripalmitin [a fatty acid] during cellular respiration. Calculate the RQ:
\(2(C_{51}H_{98}O_6)+145O_2\longrightarrow \\102CO_2+98H_2O+\text{energy}\)
1. |
0.7 |
2. |
0.9 |
3. |
1.0 |
4. |
4.0 |
5. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): |
Plants retain the capacity for unlimited growth throughout their life. |
Reason (R): |
Plants have meristems at certain locations in their body. |
In the light of the above statements choose the correct 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. |
6. When the ratio, CO2 : O2 is nearly equal, RuBisCO:
1. has no affinity for oxygen
2. has a much greater affinity for carbon dioxide
3. has a much greater affinity for oxygen
4. has equal affinity for both carbon dioxide and oxygen
7. The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?
![](https://dsbihjlymzdyy.cloudfront.net/bio_images/all/Diagrams%20in%20Svg%20form%2FPhotosynthesis%20in%20Higher%20Plants%20%2F63514.SVG.svg)
1. |
Excess carbon dioxide is released by the alga in the area of accumulation. |
2. |
Only red and violet lights are effective for photosynthesis. |
3. |
In the areas of accumulation, most oxygen was liberated by the alga. |
4. |
Bacteria are attracted to red and blue light. |
8. There is a clear division of labour within the chloroplast where:
I: |
the membrane system is responsible for trapping the light energy and for the synthesis of ATP and NADPH. |
II: |
in stroma, enzymatic reactions synthesise sugar, which in turn forms starch and synthesis of ATP but not NADPH takes place. |
1. |
Only I is correct |
2. |
Only II is correct |
3. |
Both I and II are correct |
4. |
Both I and II are incorrect |
9. The net gain of number of ATP molecules during glycolysis will be:
10. Which plant growth regulator (PGR) promotes root growth and root hair formation, thus helping the plants increase their absorption surface?
1. Auxins
2. Gibberellins
3. Ethylene
4. Kinetins
11. Consider the two statements:
Assertion: The most widely used compound as source of ethylene is ethephon.
Reason: Ethephon in an aqueous solution is readily absorbed and transported within the plant
and releases ethylene slowly.
1. Both Assertion and Reason are true and Reason correctly explains the Assertion.
2. Both Assertion and Reason are true but Reason does not correctly explain the Assertion.
3. Assertion is true; Reason is false.
4. Assertion is false; Reason is true.
12. Oxygen, during oxygenic photosynthesis, is produced during:
1. cyclic photophosphorylation
2. the light-dependent reactions involving photosystems I and II
3. Calvin cycle
4. the Krebs cycle
13. A C
3 plant was provided carbon dioxide labelled with a radioactive isotope. The amount of radioactivity was measured in chloroplasts. In which of the following molecules do you expect the radioactivity to appear first as the process of photosynthesis proceeds in this plant?
1. |
OAA |
2. |
PEP |
3. |
PGA |
4. |
RuBP |
14. The products of fermentation do not include:
1. |
CO2 |
2. |
O2 |
3. |
ethanol |
4. |
lactate |
15. Consider the two statements:
Assertion(A): |
The protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids. |
Reason(R): |
The primary accepter of electrons, which is located towards the outer side of the membrane, transfers its electron not to an electron carrier but to an H carrier. |
1. |
(A) is True but (R) is 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. |
Both (A) and (R) are False |
16. Oxygen drives the process of ATP production via ETS. The best explanation for this would be that oxygen:
1. is needed at the end of the aerobic respiration
2. is the terminal electron donor
3. is not required in the glycolytic pathway
4. acts as the final hydrogen acceptor
17. Which gaseous PGR is synthesised in large amounts by tissues undergoing senescence and ripening fruits
1. |
ABA |
2. |
IAA |
3. |
Ethylene |
4. |
GA |
Biology 1 - Section B
18. Identify the incorrect statement:
I: |
Axial skeleton comprises 80 bones distributed along the main axis of the body. |
II: |
The skull is composed of 22 bones. |
III: |
Cranial bones are 14 in number. |
IV: |
The facial region is made up of 8 skeletal elements which form the front part of the skull. |
1. Only
I and
II
2. Only
III and
IV
3. Only
II, III and
IV
4. Only
I
19. Which of the following is most likely to happen if the level of aldosterone in the blood increases?
1. more potassium is excreted in the urine
2. more sodium is excreted in the urine
3. blood pressure will drop
4. glomerular filtration rate will drop
20. The formation of oxy-hemoglobin at the alveoli is favored by all the following except:
1. High pO2 |
2. Low pCO2 |
3. Lower H+ ion concentration |
4. Higher temperature |
21. Consider the two statements:
Statement I: |
First seven pairs of the ribs are called true ribs and are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of elastic cartilage. |
Statement II: |
The 8th, 9th and 10th pairs are false ribs and join the seventh rib with the help of elastic cartilage. |
1.
Statement I is correct;
Statement II is correct
2.
Statement I is correct;
Statement II is incorrect
3.
Statement I is incorrect;
Statement II is correct
4.
Statement I is incorrect;
Statement II is incorrect
22. Consider the given two statements:
I: |
Lower invertebrates like sponges, coelenterates and flatworms exchange oxygen with carbon dioxide by simple diffusion over their entire body surface. |
II: |
Fishes are the only vertebrates that do not use lungs as respiratory organs. |
1. |
Only I is correct |
2. |
Only II is correct |
3. |
Both I and II are correct |
4. |
Both I and II are incorrect |
23. Consider the given two statements:
Assertion (A): |
The sinoatrial (SA) node region of the right atrium is the normal pacemaker of the heart. |
Reason (R): |
The human heart is myogenic in nature. |
1. |
(A) is True but (R) is False |
2. |
Both (A) and (R) are True and (R) correctly explains (A) |
3. |
(A) is False but (R) is True |
4. |
Both (A) and (R) are True but (R) does not correctly explain (A) |
24. The figure shows pulmonary volumes as measured on a spirometer. Which of the following will be true?
![](https://dsbihjlymzdyy.cloudfront.net/bio_images/all/Diagrams%20in%20Svg%20form%2FBreathing%20and%20Exchange%20of%20Gases%2F347436.svg.svg)
I: |
A+B = Inspiratory Reserve Volume |
II: |
C+D = Functional Residual Capacity |
III: |
B+C = Tidal Volume |
IV: |
[(A+B+C+D) – (A+B+C)] = Residual Volume |
1. Only
II is correct
2. Only
II and
IV are correct
3. Only
I and
III are correct
4.
I,
II,
III and
IV are correct
25. The examples of de-differentiation in plants include:
I: |
Formation of a tumour. |
II: |
Parenchyma cells made to divide under controlled laboratory conditions during plant tissue culture. |
1. |
Only I |
2. |
Only II |
3. |
Both I and II |
4. |
Neither I nor II |
Biology 2 - Section A
26. In hemodialysis, the role of artificial kidney is actually played by:
1. |
Dialysate |
2. |
Blood pump |
3. |
Water system |
4. |
Cellulose membrane |
27. 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 |
28. The dark and light bands seen as striations in a skeletal muscle are located on:
1. |
Myofilaments |
2. |
Muscle fiber |
3. |
Myofibril |
4. |
Motor unit |
29. Protonephridia are the excretory structures in all the following except:
1. Planaria |
2. Rotifers |
3. Amphioxus |
4. Prawns |
30. 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
31. A canal called the cerebral aqueduct passes through the:
1. Cerebral hemispheres |
2. Diencephalon |
3. Mid brain |
4. Hind brain |
32. The peripheral chemoreceptors are:
1. more sensitive to a decrease in than to a decrease in
2. stimulated by hypocapnia
3. located in the medulla oblongata of the brain stem
4. more sensitive to a decrease in than to a decrease in
33. The region of human kidney where you expect to find maximum osmolarity is:
1. at the top of the renal cortex
2. at the bottom of the renal cortex
3. at the top of the renal medulla
4. at the bottom of the renal medulla
34. The axial skeleton in human beings include:
1. skull, vertebral column, hyoid bone and rib cage
2. arms, legs, and pelvic girdle
3. skull and pectoral girdle
4. sternum, rib cage, vertebral column, and pelvic girdle
35. The joint between atlas and axis vertebra is classified as:
1. |
Saddle joint |
2. |
Pivot joint |
3. |
Gliding joint |
4. |
Hinge joint |
36. Passive filling accounts for about what percent of ventricular filling?
37. When anti B antibodies are present in the plasma and A antigens on the surface of RBCs of a person, her blood group can be:
1. |
A and AB |
2. |
Only A |
3. |
Only B |
4. |
O |
38. The ‘double circulation’ of humans includes:
I: Systemic circulation
II: Coronary circulation
III: Pulmonary circulation
IV: Portal circulation
1. |
I and III only |
2. |
I and II only |
3. |
II and IV only |
4. |
II and III only |
39. Identify the correct statement:
1. |
Unmyelinated neurons in PNS are not surrounded by Schwann cell |
2. |
Electrical synapses, being faster, are more common in the human body |
3. |
Pia mater is in contact with the brain tissue |
4. |
The entire hindbrain and the midbrain constitute the brain stem |
40. Consider the following two statements:
I: |
Repeated activation of muscles can lead to fatigue. |
II: |
Repeated activation of muscles can lead to accumulation of lactic acid. |
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
41. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): |
Neurons are excitable cells. |
Reason (R): |
Their membranes are in a polarised state. |
In the light of the above statements choose the correct 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. |
(A) is False but (R) is True. |
42. In a normal ECG, The T wave represents:
1. |
ventricular depolarization |
2. |
atrial repolarization |
3. |
ventricular repolarization |
4. |
atrial depolarization |
Biology 2 - Section B
43. The hypothalamus:
I: |
is a part of the rhombencephalon. |
II: |
contains a number of centres which control body temperature, urge for eating and drinking. |
III: |
contains several groups of neurosecretory cells, which secrete hormones called hypothalamic hormones. |
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. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): |
Once initiated, the action potential has a magnitude that is independent of the strength of the triggering stimulus. |
Reason (R): |
Action potentials are all or none responses to stimuli. |
In the light of the above statements choose the correct 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. |
45. The definition of hormone describes them as having all the following features except:
1. non-nutrient chemicals
2. intra-cellular messengers
3. produced in trace amounts
4. act on distant target organ
46. All the following hormones are produced by anterior pituitary except:
1. Gonadotropins |
2. ACTH |
3. Prolactin |
4. Melatonin |
47. Thymus:
I: |
is located ventral to the heart/aorta |
II: |
plays a major role in differentiation of T-lymphocytes |
III: |
promotes production of antibodies |
IV: |
enlarges with age |
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
48. 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 |
49. All the following are common second messengers involved in hormonal actions except:
1. Cyclic adenosine monophosphate
2. Inositol phosphate
3. Prostaglandins
4. Calcium
50. The pineal gland:
I: |
helps in maintaining the normal rhythms of sleep-wakefulness cycle and body temperature. |
II: |
influences metabolism, pigmentation and the menstrual cycle. |
1. Only
I is correct
2. Only
II is correct
3. Both
I and
II are correct
4. Both
I and
II are incorrect
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