Biology 1 - Section A
1. Consider the given two statements:
I: |
The oxygenation reaction of RuBisCO is a wasteful process. |
II: |
3-phosphoglycerate is not created. |
1. |
Both I and II are correct and II explains I |
2. |
I is correct but II is incorrect |
3. |
Both I and II are correct but II does not explain I |
4. |
I is incorrect but II is correct |
2. Phosphorylation of glucose during glycolysis is catalysed by
1. Phosphoglucomutase |
2. Phosphoglucoisomerase |
3. Hexokinase |
4. Phosphorylase |
3. The exponential growth in plants can be expressed as: W1 = W0ert where ‘e’ denotes:
1. Initial size at the beginning of the period
2. base of natural logarithms
3. growth rate/elongation per unit time
4. time of growth
4. Consider the given two statements:
Statement I: |
In C4 plants, photorespiration does not occur. |
Statement II: |
C4 plants do not have RuBisCO in any of their cells. |
1. |
Both Statement I and Statement II are correct and Statement II explains Statement I |
2. |
Both Statement I and Statement II are correct but Statement II does not explain Statement I |
3. |
Statement I is correct but Statement II is incorrect |
4. |
Statement I is incorrect but Statement II is correct |
5. 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?
6. The given diagram shows the scheme of:
1. Cyclic photophosphorylation and Y is NADPH
2. Cyclic photophosphorylation and Y is ATP
3. Non-Cyclic photophosphorylation and Y is NADPH
4. Non-Cyclic photophosphorylation and Y is ATP
7. What percentage in atmosphere of carbon dioxide can become damaging to plants over long periods?
1. |
0.03 to 0.04 |
2. |
0.04 to 0.05 |
3. |
0.05 |
4. |
more than 0.05 |
8. The correct and complete equation for the process of photosynthesis in higher plants will be:
1. |
6CO2 + 12H2O + light energy → C6H12O6 + 6O2+ 6H2O |
2. |
6CO2 + 6H2O + light energy → C6H12O6 + 6O2 |
3. |
CO2 + H2O + light energy → [CH2O] + O2 |
4. |
C6H12O6 + 6O2 → 6CO2 + 6H2O |
9. Consider the given two statements:
Assertion: Plants that do not use PEP-carboxylase in carbon fixation are called C3 plants.
Reason: The primary carboxylation reaction in C3 plants, catalyzed by RuBisCO, produces the three-carbon 3-phosphoglyceric acids directly in the Calvin-Benson cycle.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Assertion is false but Reason is true
10. The relationship between incident light and carbon dioxide fixation by photosynthetic plants, at low light intensities, is a:
1. | Straight line relationship | 2. | Hyperbola relationship |
3. | Parabola relationship | 4. | Ellipse relationship |
11. Consider the two statements:
Assertion: The light-independent reactions do not require light, but they are most likely to occur during the day.
Reason: NADPH and ATP from the light-dependent reactions are used in the light-independent reactions.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and Reason explains Assertion
3. Both Assertion and Reason are true but Reason does not explain Assertion
4. Assertion is false but Reason is true
12. Identify the correctly matched pairs:
I: |
chloroplast--double membrane organelle |
II: |
mitochondrion--double membrane organelle |
III: |
matrix of mitochondrion--location of glycolysis |
IV: |
cristae of mitochondrion--location of the electron transport system |
1. |
Only I and II |
2. |
Only I, II and IV |
3. |
Only II, III and IV |
4. |
I, II, III and IV |
13. Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
1. Plasticity |
2. Norm of the reaction |
3. Development noise |
4. Acclimatisation |
14. The continued oxidation of acetyl CoA via the TCA cycle requires the continued replenishment of:
I. Oxaloacetic acid |
II. NAD+ |
III. FAD |
1. |
I and II only |
2. |
I and III only |
3. |
II and III only |
4. |
I, II and III |
15. The outputs of the Krebs cycle do not include:
1. NADP |
2. |
3. ATP |
4. |
16. Two successive steps of decarboxylation in the TCA cycle lead to the formation of:
1. α-ketoglutaric acid
2. fumaric acid
3. isocitric acid
4. succinyl-CoA
17. In C4 plants:
Statement I: CO2 is initially incorporated into a four-carbon organic acid (either malate or aspartate) in the mesophyll cells.
Statement II: The chloroplasts of the bundle sheath cells convert this CO2 into carbohydrates by the conventional C3 pathway.
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is correct
Biology 1 - Section B
18. Gas exchange in the human lungs takes place across the respiratory membrane which is made up of:
1. alveolar macrophages and the alveolar cell membrane
2. alveolar cell membrane and its basement membrane
3. alveolar cell membrane and capillary membrane
4. alveolar cell membrane, capillary membrane, and fused basement membranes
19. A counter-current exists in the human kidneys between:
I: |
the two limbs of Henle’s loop. |
II: |
the two limbs of vasa recta. |
III: |
the Henle’s loop and vasa recta. |
1. Only III is correct
2. Only I and II are correct
3. Only II and III are correct
4. I, II and III are correct
20. Consider the two statements:
Assertion: ABA is also called the stress hormone.
Reason: ABA plays an important role in seed development, maturation and dormancy.
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.
21. If the heart rate is 60 per minute, the duration of each cardiac cycle will be:
1. | 0.8 seconds | 2. | 0.75 seconds |
3. | 1.0 second | 4. | 1.2 second |
22. Given below are two statements:
Assertion (A): |
Vertebrochondral ribs are called true ribs. |
Reason (R): |
Vertebraochondral ribs are attached to the thoracic vertebrae dorsally and are ventrally connected to the sternum. |
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. |
23. Tissue death (infarction) of the heart muscle (myocardium) caused by ischaemia [the lack of oxygen delivery to myocardial tissue] is called as:
1. Heart attack
2. Heart failure
3. Heart block
4. Cardiac arrest
24. Which of the following is not correctly matched?
I. |
Thoracic chamber is formed dorsally by |
Sternum |
II. |
Thoracic chamber is formed ventrally by |
Vertebral column |
III. |
Thoracic chamber is formed laterally by |
Ribs |
IV. |
Thoracic chamber is formed on the lower side by |
Diaphragm |
Options:
1. I and II only |
2. II only |
3. III and IV only |
4. I, II, III and IV |
25. How many of the following can be characterized as action of gibberellins on plants?
I: |
They can be used to increase the length of grape stalks. |
II: |
They can elongate and improve the shape of apple. |
III: |
They speed up malting process in brewing industry. |
IV: |
They hasten the maturity period of juvenile conifers. |
V: |
They promote bolting in many plants with rosette habit. |
Biology 2 - Section A
26. Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes |
2. axons |
3. Schwann cells |
4. ependymal |
27. The cardiac output can be increased by:
I. Sympathetic neural signals
II. Adrenal cortical hormones
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
28. Under normal physiological conditions, what amount of oxygen is delivered to the tissues?
1. 4 ml |
2. 5 ml |
3. 15 ml |
4. 20 ml |
29. The type of joint seen between the carpal bones is:
1. Hinge |
2. Pivot |
3. Gliding |
4. Saddle |
30. The least common of WBCs in the human blood are:
1. Eosinophils |
2. Lymphocytes |
3. Neutrophils |
4. Basophils |
31. During a cardiac cycle, the ventricular systole will lead to:
1. ventricular filling.
2. the atrioventricular valves to close, and then the semilunar valves to open.
3. the semilunar valves to close, and then the atrioventricular valves to open.
4. pressure to become greater in the aorta and pulmonary trunk than in the ventricles.
32. ATPase activity is found in:
1. |
Myosin head |
2. |
Myosin tail |
3. |
G-Actin |
4. |
Troponin |
33. Another name for lymph would be:
1. Extra-cellular fluid |
2. Tissue fluid |
3. Plasma ultrafiltrate |
4. Serous fluid |
34. The part of the sarcomere that is composed of only myosin myofilaments is:
1. |
A band |
2. |
I band |
3. |
M line |
4. |
H zone |
35. 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 |
36. The reabsorption, from the filtrate, of sodium, glucose and amino acids:
1. involves the Bowman's capsule
2. is restricted to the loop of Henle
3. occurs mainly in the proximal convoluted tubules
4. occurs mainly by osmosis
37. Which of the following will not be equal in normal physiological conditions?
1. |
Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues |
2. |
Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood |
3. |
Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli |
4. |
Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood |
38. Presence of ketonuria and glycosuria is indicative of:
1. Renal failure |
2. Diabetes mellitus |
3. Nephrotic syndrome |
4. Renal stones |
39. The resting axonal membrane is impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charges proteins present in the axoplasm
1. I and II only |
2. I and III only |
3. II and III only |
4. I, II and III |
40. Identify the incorrect statement:
1. |
The descending limb of loop of Henle is permeable to water but
almost impermeable to electrolytes. |
2. |
The ascending limb of loop of Henle is impermeable to water but
allows transport of electrolytes actively or passively. |
3. |
DCT is capable of reabsorption of bicarbonate ions and selective
secretion of hydrogen and potassium ions and ammonia to maintain
the pH and electrolyte balance in the body. |
4. |
PCT does not play any role in reabsorption of bicarbonate ions and
selective secretion of hydrogen and ammonia to maintain the pH
and electrolyte balance in the body. |
41. If the atrioventricular node is damaged:
1. SA node would not develop action potential
2. atria will fail to contract
3. the impulse will not reach AV node
4. the impulse will not reach ventricles
42. Hypocalcaemia can lead to:
1. |
Duchenne Muscular Dystrophy |
2. |
Tetany |
3. |
Renal calculi |
4. |
Myasthenia gravis |
Biology 2 - Section B
43. Some hormones can act on their target cells through second messengers. Identify the one that does not:
1. |
cortisol |
2. |
adrenaline |
3. |
FSH |
4. |
calcitonin |
44. A hormonal disorder that develops when pituitary gland produces too much growth hormone during adulthood is known as:
1. cretinism |
2. gigantism |
3. Conn’s syndrome |
4. acromegaly |
45. Identify the correct statement regarding the pineal gland or the hormone secreted by it:
1. |
The gland is situated on the ventral side of the forebrain |
2. |
The hormone secreted by the gland is called as melanin |
3. |
The hormone regulates the diurnal rhythm of our body |
4. |
The hormone decreases immunity |
46. In males, androgens like testosterone secreted by Leydig cells in testes do not:
1. regulate the development, maturation and functions of the male accessory sex organs
2. control the development and regulation of the secondary sexual characters
3. play a major stimulatory role in the process of spermatogenesis
4. produce catabolic effects on protein and carbohydrate metabolism
47. There are two types of axons, namely, myelinated and non-myelinated. Find out the correct statement:
I: |
The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. |
II: |
Myelinated nerve fibres are found in spinal and cranial nerves. |
III: |
Unmyelinated nerve fibres are not enclosed by a Schwann cell and a myelin sheath around the axon. |
IV: |
Unmyelinated nerve fibres are commonly found in autonomous and the somatic neural systems. |
1. |
I, II only IV only |
2. |
III and IV only |
3. |
I, II, III and IV |
4. |
None, All are incorrect |
48. Somatostatin from the hypothalamus:
1. stimulates secretion of insulin and glucagon by pancreas
2. inhibits secretion of insulin and glucagon by pancreas
3. stimulates secretion of growth hormone from anterior pituitary
4. inhibits secretion of growth hormone from anterior pituitary
49. The midbrain:
I: is located between the thalamus/hypothalamus of the forebrain and pons of the hindbrain.
II: is the part of the brain traversed by the cerebral aqueduct.
III: consists mainly of four round swellings (lobes) called corpora cavernosa.
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
50. Repolarization after depolarisation is the result of:
1. Sodium ions flowing out of the cell.
2. Sodium ions flowing into the cell.
3. Potassium ions flowing into the cell.
4. Potassium ions flowing out of the cell.
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