Biology 1 - Section A
1. Consider the given statements:
Statement I: |
In alcohol fermentation in yeast, pyruvic acid decarboxylase and alcohol dehydrogenase convert pyruvic acid to carbon dioxide and ethanol. |
Statement II: |
In lactic acid fermentation, lactate dehydrogenase reduces pyruvic acid to lactic acid and carbon dioxide in muscle cells during exercise. |
1. |
Both Statement I and Statement II are correct |
2. |
Both Statement I and Statement II are incorrect |
3. |
Statement I is correct but Statement II is incorrect |
4. |
Statement I is incorrect but Statement II is correct |
2. The given curve:
I: |
is characteristic of living organism growing in a natural environment. |
II: |
is typical for all cells, tissues and organs of a plant. |
1. Only
I is correct
2. Only
II is correct
3. Both
I and
II are correct
4. Both
I and
II are incorrect
3. All the following are functions of auxins in plants except:
1. They help to initiate rooting in stem cuttings.
2. They promote flowering e.g. in pineapples.
3. They help to prevent fruit and leaf drop at early stages.
4. They prevent the abscission of older mature leaves and fruits.
4. Which of the following is not a function of ethylene?
1. |
Breaking seed and bud dormancy |
2. |
Horizontal growth of seedlings, swelling of axis and apical hook formation in dicot seedlings |
3. |
Enhancement of respiration rate during ripening of fruits |
4. |
Closure of stomata during water stress |
5. Consider the given two statements:
I: |
Spraying sugarcane crop with gibberellins increases the yield by as much as 20 tonnes per acre. |
II: |
Sugarcane stores carbohydrates as sugar in their stems and spraying sugarcane crop with gibberellins increases the length of the stem. |
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
6. Identify the incorrectly matched pair:
1. |
PS I |
P700 is reaction center |
2. |
RuBP |
5 carbon compound |
3. |
PS II |
P680 is reaction center |
4. |
C3 plants |
Kranz anatomy |
7. How many ATP molecules are directly synthesised in the glycolytic pathway from one glucose molecule?
1. 2
2. 4
3. 10
4. 30
8. Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition, it forms
1. |
Lactic acid |
2. |
CO2 + H2O |
3. |
Acetyl CoA + CO2 |
4. |
Ethanol + CO2 |
9. Identify the incorrectly matched pair:
|
Respiratory Complex |
Pathway for electron transport |
1. |
NADH dehydrogenase |
NADH – FMN – [Fe-S] – Q |
2. |
Succinic dehydrogenase |
FADH2 – FMN - Q |
3. |
Cytochrome bc1 |
Cyt b – [Fe-S] – Cyt c1 |
4. |
Cytochrome c oxidase |
CuA – Cyt a – Cyt a3 – CuB |
10. RuBP is:
1. |
2 carbon ketose sugar |
2. |
2 carbon aldose sugar |
3. |
5 carbon ketose sugar |
4. |
5 carbon aldose sugar |
11. The crucial events in aerobic respiration are:
A: |
The partial oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving six molecules of CO2. |
B: |
The passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with simultaneous synthesis of ATP. |
1. Only
A is correct
2. Only
B is correct
3. Both
A and
B are correct
4. Both
A and
B are incorrect
12. What will be true for the metabolic reaction shown in the given figure?
I: |
It shows hydrolysis of sucrose, a disaccharide, into two monosaccharides, a glucose and a fructose molecule. |
II: |
The enzyme that is capable of catalysing this reaction is invertase. |
1. |
Only I |
2. |
Only II |
3. |
Both I and II |
4. |
Neither I nor II |
13. C. B. van Niel proved that:
1. |
Plants produce glucose when they grow. |
2. |
Blue and red light are effective for photosynthesis. |
3. |
It is only the green parts of the plants that could release oxygen. |
4. |
Hydrogen from a suitable oxidizable compound reduces carbon dioxide to carbohydrates. |
14. Difference in shapes of leaves produced in air and those produced in water represents heterophyllous development due to environment in:
1. |
Cotton |
2. |
Coriander |
3. |
Larkspur |
4. |
Butter cup |
15. In the ‘Regeneration’ stage of the Calvin cycle:
1. |
Five G3P molecules produce three RuBP molecules, using up three molecules of ATP. |
2. |
Three G3P molecules produce five RuBP molecules, using up three molecules of ATP. |
3. |
Three G3P molecules produce five RuBP molecules, using up five molecules of ATP. |
4. |
Five G3P molecules produce three RuBP molecules, using up five molecules of ATP. |
16. Consider the given two statements:
Statement I: |
Green house crops such as tomatoes and bell pepper are allowed to grow in carbon dioxide enriched atmosphere. This leads to higher yields. |
Statement II: |
C3 plants respond to higher carbon dioxide concentration by showing increased rates of photosynthesis, leading to higher productivity. |
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 |
17. Which component of the mitochondrial ETS is not a protein?
1. Complex I
2. Cytochrome c
3. Ubiquinone
4. Complex IV
Biology 1 - Section B
18. Consider the two statements:
Statement I: |
Expiratory Capacity is the total volume of air a person can expire after a normal inspiration. |
Statement II: |
Functional Residual Capacity is the volume of air that will remain in the lungs after a forceful maximal expiration. |
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
19. The major mode of transport of carbon dioxide in human body is:
1. |
in combination with hemoglobin |
2. |
in dissolved state in plasma |
3. |
as carboxyhemoglobin |
4. |
as bicarbonate |
20. The external intercostal muscles and the diaphragm contract:
1. during inhalation
2. during exhalation
3. during both inhalation and exhalation
4. during neither inhalation nor exhalation.
21. Vital capacity can be defined as:
I: |
The maximum volume of air a person can breathe in after a normal expiration. |
II: |
The maximum volume of air a person can breathe out after a normal inspiration. |
1. Only
I is correct
2. Only
II is correct
3. Both
I and
II are correct
4. Both
I and
II are incorrect
22. The part of the nephron that plays a significant role in the maintenance of high osmolarity of medullary interstitial fluid is:
1. Proximal Convoluted Tubule (PCT)
2. Distal Convoluted Tubule (DCT)
3. Loop of Henle – ascending limb
4. Loop of Henle – descending limb
23. It is necessary that lungs must be present in anatomically air-tight chamber because:
1. |
we cannot directly alter the pulmonary volume |
2. |
our lungs are not made of any elastic tissue |
3. |
the pleural cavity always has a positive pressure with respect to pulmonary pressure |
4. |
the partial pressure of oxygen in atmosphere is less than that in the alveoli |
24. Which of the following is not formed as result of re-differentiation in plants?
1. Cork cambium
2. Phellem
3. Periderm
4. Secondary xylem
25. Identify the WBC:
1. Neutrophil
2. Basophil
3. Lymphocyte
4. Monocyte
Biology 2 - Section A
26. All the following regarding red muscle fibers are true except:
1. |
They are adapted for slow and sustained activity |
2. |
They have a high content of myoglobin |
3. |
They are rich in mitochondria |
4. |
They depend on anaerobic process for energy |
27. Conditional absorption of water takes place mainly in:
1. PCT |
2. Loop of Henle |
3. DCT |
4. Collecting duct |
28. The presence of which of the following in urine would be abnormal?
1. sodium |
2. glucose |
3. urea |
4. creatinine |
29. Normal activities of the human heart are regulated:
1. Intrinsically
2. By the autonomic nervous system
3. By the somatic neural system
4. By the adrenal medullary hormones
30. The most toxic nitrogenous metabolic waste product is:
1. ammonia |
2. urea |
3. uric acid |
4. methane |
31. Consider the two given statements:
I: |
Pulmonary circulation carries deoxygenated blood to the lungs and brings oxygenated blood back to the heart. |
II: |
The systemic circulation provides nutrients, oxygen and other essential substances to the tissues and takes carbon dioxide and other harmful substances away for elimination. |
1. Only
I is correct
2. Only
II is correct
3. Both
I and
II are correct
4. Both
I and
II are incorrect
32. Where do you expect to find podocytes?
1. In the wall of afferent arteriole
2. In the wall of the DCT
3. In the lining of Bowman’s capsule
4. In the lining of Vasa recta
33. Which of the following parts of the human brain functions as a gateway to the cerebrum and is a major coordinating center for sensory and motor signaling?
1. |
Thalamus |
2. |
Hypothalamus |
3. |
Corpora quadrigemina |
4. |
Pons |
34. The vertebral column originally develops as a series of ______ vertebrae, but this number is eventually reduced to _________ vertebrae.
1. |
33, 26 |
2. |
31, 24 |
3. |
30, 26 |
4. |
33, 21 |
35. Match type of synovial joint in Column I with correct example in Column II and select the correct answer from the codes given below:
|
Column I |
|
Column II |
A. |
Ball and socket |
a. |
Gleno-humeral joint |
B. |
Gliding |
b. |
First carpometacarpal joint |
C. |
Saddle |
c. |
Between carpal bones |
D. |
Condyloid |
d. |
Metacarpophalangeal joint |
Codes
|
A |
B |
C |
D |
1. |
d |
c |
b |
a |
2. |
d |
b |
c |
a |
3. |
a |
c |
b |
d |
4. |
a |
b |
c |
d |
36. When the neuron is not conducting any impulse, i.e., resting, the axonal membrane:
1. |
is comparatively more permeable to sodium ions and nearly impermeable to potassium ions. |
2. |
is freely permeable to sodium ions and potassium ions. |
3. |
is impermeable to sodium ions and potassium ions. |
4. |
is comparatively more permeable to potassium ions and nearly impermeable to sodium ions. |
37. Match each item in Column I with one in Column II and select the correct match from the codes given:
Column I |
Column II |
A. Peripheral neural system |
P. Comprises of all nerves associated with brain and spinal cord |
B. Somatic neural system |
Q. Relays impulses from CNS to skeletal muscles |
C. Visceral neural system |
R. Transmits impulse from CNS to involuntary organs and smooth muscles |
D. Autonomic neural system |
S. Part of PNS where impulses travel from CNS to the viscera and from the viscera to the CNS |
Codes:
|
A |
B |
C |
D |
1. |
P |
Q |
R |
S |
2. |
Q |
R |
S |
P |
3. |
R |
S |
P |
Q |
4. |
S |
P |
Q |
R |
38. Formed elements and clotting factors are removed from the blood. The remaining fluid will be called as:
1. |
Plasma |
2. |
Lymph |
3. |
Serum |
4. |
Antiserum |
39. Force generated by the muscles is used to carry out movement through joints, where the joint acts as a:
1. |
Fulcrum |
2. |
Effort |
3. |
Resistance |
4. |
Load |
40. Identify the incorrectly matched pair:
1. Average duration of a cardiac cycle: 0.8 sec
2. Stroke volume of each ventricle: 120 ml
3. Highest normal systolic blood pressure: 140 mm Hg
4. Highest normal diastolic blood pressure: 90 mm Hg
41. Identify the incorrectly matched pair:
1. |
Limbic system |
Behaviour |
2. |
Medulla oblongata |
Gastric secretions |
3. |
Hypothalamus |
Thermoregulation |
4. |
Corpus callosum |
Connects cerebellum with rest of the brain |
42. The duration of inspiration can be reduced by:
1. |
an increase of carbon dioxide in blood |
2. |
a chemical signal from aortic and carotid bodies |
3. |
a neural signal from pneumotaxic center |
4. |
an increase in hydrogen ion concentration in CSF |
Biology 2 - Section B
43. Hormones which interact with intracellular receptors:
1. generate second messengers
2. depolarize the membrane of the target cells
3. stop the enzymatic actions of membrane proteins
4. regulate gene expression
44. The actions of adrenaline will include all the following except:
1. Piloerection
2. Pupilary dilation
3. Glycogenesis
4. Positive ionotropic and chronotropic effect on heart
45. ADH and oxytocin are synthesized by:
1. Anterior pituitary |
2. Hypothalamus |
3. Pars intermedia |
4. Pars nervosa |
46. The peripheral nervous system in the human body does not include:
1. |
cranial nerve |
2. |
ganglion |
3. |
spinal cord |
4. |
spinal nerve |
47. During pregnancy, the deficiency of which of the following can cause defective development and maturation of the growing baby leading to stunted growth, mental retardation, abnormal skin and deaf-mutism?
1. |
Calcium |
2. |
Iron |
3. |
Iodine |
4. |
Nitrogen |
48. Consider the two statements:
Assertion (A): |
Apart from the organised endocrine glands, hormones are secreted by other parts of the human body as well. |
Reason (R): |
Hormone is any non-nutrient chemical which acts as intercellular messenger and is produced in trace amounts. |
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. |
49. What would be true for the cells shown in the given diagram?
1. A is involved in gestation and B in olfaction
2. A is a part of sympathetic and B of parasympathetic division of ANS
3. A secretes myelin sheath around axons in CNS while B does it in PNS
4. A is responsible for scotopic vision and B is responsible for photopic vision |
|
50. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
1. Relaxin-Gigantism |
2. Prolactin-Cretinism |
3. Parathyroid hormone-Tetany |
4. Insulin-Diabetes insipidus |
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