Test 22 (Class 11) - Type Bio SCAN (New NCERT)

Biology 1 - Section A

1.

Phycoerythrin is the major pigment in :
1. Red algae
2. Blue-green algae
3. Green algae
4. Brown algae

2. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A):	Cyclic photophosphorylation results in the synthesis of ATP but not of NADPH + H+.
Reason (R):	The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain.

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.

3.

In Hatch and Slack pathway, the primary CO₂ acceptor is -
1. Oxaloacetic acid
2. Phosphoglyceric acid
3. Phosphoenol pyruvate
4. Rubisco

4.

The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration

5.

The catalytic knobs of ATP synthetase in a thylakoid membrane is located:

1.	on the side facing the thylakoid space.
2.	on the stroma side of the membrane.
3.	embedded deep within the membrane
4.	on the pigments molecules of Photosystems

6.

Which of the following statements regarding mitochondria is incorrect?

1.	Mitochondrial matrix contains single circular DNA molecule and ribosomes.
2.	Outer membrane is permeable to monomers of carbohydrates, fats, and proteins.
3.	Enzymes of electron transport are embedded in the outer membrane.
4.	Inner membrane is convoluted with infoldings.

7.

Both Rhizobium and Alnus:
I. are free-living in soil
II. as symbionts can fix atmospheric nitrogen
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

8.

What percent of ATP produced during glycolysis are the result of substrate level phosphorylation?
1. 0
2. 25
3. 50
4. 100

9.

Assertion:	Photophosphorylation in chloroplasts and oxidative phosphorylation in mitochondria are different.
Reason:	In chloroplasts the high energy electrons come from food while in mitochondria they come from water.

1.	Both assertion and reason are true and the reason is the correct explanation of the assertion.
2.	Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3.	Assertion is true but reason is false.
4.	Both assertion and reason are false

10. What provides the electrons needed to replace those removed from photosystem II during non cyclic photophosphorylation?

1.	PS I	2.	Oxygen
3.	Water	4.	Carbon dioxide

11. The initial carboxylation reaction:

1.	occurs in mesophyll cells in C₃ plants and in bundle sheath cells in C₄ plants
2.	occurs in bundle sheath cells in C₃ plants and in mesophyll cells in C₄ plants
3.	occurs in mesophyll cells in both C₃ plants and in C₄ plants
4.	occurs in bundle sheath cells in both C₃ plants and in C₄ plants

12.

Based on the figures given below, calculate the efficiency of the process of aerobic cellular respiration in a eukaryotic cell:
I. The total yield is 32 ATP molecules
II. Complete oxidation of a mole of glucose releases 686 kcal or energy under standard conditions.
III. Phosphorylation of ADP to form ATP stores at least 7.3 kcal per mole of ATP

1.	3.5 %	2.	32 %
3.	34 %	4.	51 %

13.

During chemiosmosis in the chloroplast:

1.	Splitting of water molecule takes place on the outer side of the thylakoid membrane
2.	As electrons move through the photosystems protons are transported from the thylakoid lumen to the stroma
3.	The NADP reductase enzyme is located on the stroma side of the thylakoid membrane
4.	The CF₁ portion of the ATP synthase forms a transmembrane channel in the thylakoid membrane

14.

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	Auxins	P	Indole compounds
B.	Cytokinins	Q	Skoog and Miller
C.	Gibberellins	R	Terpenes
D.	Ethylene	S	Cousins

Codes:

	A	B	C	D
1.	P	Q	R	S
2.	P	R	S	Q
3.	R	P	Q	S
4.	R	S	P	Q

15.

Calvin cycle consumes more ATP than NADPH. What is the source of this extra ATP needed?
1. PS I
2. PS II
3. Cyclic electron flow
4. Linear electron flow

16. Identify the incorrect statement regarding photosynthesis in higher plants:

1.	Chlorophyll a is the chief pigment associated with photosynthesis.
2.	Splitting of water is associated with PS II
3.	Cyclic flow of electrons results only in the synthesis of NADH
4.	Biosynthetic phase is dependent on the products of the light reaction

17. When the ratio of carbon dioxide and oxygen in the vicinity of RuBisCO is 1, the affinity of the enzyme:

1.	is nearly nil for oxygen
2.	is about equal for both carbon dioxide and oxygen
3.	is much greater for oxygen than carbon dioxide
4.	is much greater for carbon dioxide than oxygen

Biology 1 - Section B

18.

During seed germination its stored food is mobilized by:
1. Cytokinin
2. ABA
3. Gibberellin
4. Ethylene

19.

Another centre present in the pons region of the brain can moderate the functions of the respiratory rhythm centre. What is incorrect regarding this centre?
1. It is called the pneumotaxic centre
2. It stimulates/prolongs inspiration
3. Its action can lead to the alteration of the respiratory rate
4. Signals from this centre can reduce the duration of inspiration

20.

Assertion:	Some seeds that normally require certain environmental conditions to germinate, break dormancy if they are treated with gibberellins.
Reason:	Gibberellins stimulate the synthesis of digestive enzymes that mobilize stored nutrients

1.	Both assertion and reason are true and the reason is the correct explanation of the assertion.
2.	Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3.	Assertion is true but reason is false.
4.	Both assertion and reason are false

21. ADH:

I:	is released when an excessive loss of fluid from the body activates osmoreceptors in the body.
II:	prevents dieresis by facilitating water reabsorption from the initial and proximal parts of the tubules.

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.

Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid

23. Approximately what amount of carbon dioxide is removed by lungs per hour in a healthy resting individual?

1.	200 ml	2.	12 L
3.	122 L	4.	288 L

24.

The production of which of the following plant hormones by the apical bud of a pine tree inhibits the growth of lateral buds?
1. ABA.
2. cytokinin.
3. gibberellin.
4. auxin.

25.

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

Biology 2 - Section A

26.

Which of the following hormones can play a significant role in osteoporosis?
1. Estrogen and Parathyroid hormone
2. Progesterone and Aldosterone
3. Aldosterone and Prolactin
4. Parathyroid hormone and Prolactin

27.

When the stroke volume of the ventricles is much less than the expected values, the heart is said to be:
1. Fibrillating
2. Blocked
3. Arrested
4. Failing

28.

All veins carry deoxygenated blood except
1. pulmonary vein
2. hepatic vein
3. hepatic portal vein
4. renal vein

29.

During urine formation, the tubular cells secrete all the following into the filtrate except:
1. $K^{+}$
2. Ammonia
3. $H^{+}$
4. ${HCO}_{3}^{-}$

30.

The risk of the fetus developing hemolytic disease of the new born is present in:
1. any Rh+ fetus
2. second Rh- fetus of Rh+ mother
3. second Rh+ fetus of Rh- mother
4. Rh- mother

31.

The figure shows a diagrammatic view of the human respiratory system with labels A, B, C, and D. Select the option that gives the correct identification, main function, and/or characteristics:

1.	B-pleural membrane- surrounds ribs on both sides to provide cushion against rubbing.
2.	C-alveoli-thin walled vascular bag-like structures for the exchange of gases.
3.	D-lower end of the lungs-diaphragm pulls it down during inspiration.
4.	A trachea-long tube supported by complete cartilaginous rings for conducting inspired air.

32.

The total number of the phalanges in the human body are:
1. 14
2. 20
3. 32
4. 56

33.

Under normal physiological conditions, when compared to pulmonary circulation:
1. the amount of blood circulated in systemic circulation is more
2. the amount of blood circulated in systemic circulation is less
3. the pressure of blood circulated in systemic circulation is more
4. the pressure of blood circulated in systemic circulation is less

34.

Select the correct statement.
1. Expiration occurs due to external intercostal muscles.
2. Intrapulmonary pressure is lower than the atmospheric pressure during inspiration.
3. Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure.
4. Expiration is initiated due to contraction of diaphragm.

35.

Uric acid is the chief nitrogenous component of the excretory products of
1. man
2. earthworm
3. cockroach
4. frog

36.

Select the correct matching of the type of the joint with the example in the human skeletal system
1. Cartilaginous joint - between frontal and parietal
2. Pivot joint - between third and fourth Cervical vertebrae
3. Hinge joint - between humerus and pectoral girdle
4. Gliding joint - between carpals

37.

The contractile protein of skeletal muscle involving ATPase activity is
1. Tropomyosin
2. Myosin
3. α- Actinin
4. Troponin

38.

Which of the following match is correct?
1. Emphysema : reduction of surface area of alveoli and bronchi
2. Pneumonia : occupational disease with asbestos
3. Silicosis : inflammation of alveoli
4. Asthma : excessive secretion of bronchial mucus

39.

Assertion: The first and the second heart sounds are produced by the closure of AV and semilunar valves respectively.
Reason: The opening of the valves should not produce any sounds under normal physiological conditions.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false

40.

A combination of carbon dioxide and hemoglobin, CO2HHb, being one of the forms in which carbon dioxide exists in the blood is the
1. oxyhemoglobin.
2. deoxyhemoglobin.
3. carboxyhemoglobin.
4. carbaminohemoglobin

41.

The net filtration pressure in human kidney is estimated to be:
1. 60 mm Hg
2. 32 mm Hg
3. 18 mm Hg
4. 10 mm Hg

42.

The endocrine gland located at the superior pole of kidney is:
1. spleen
2. pancreas
3. adrenal gland
4. testes

Biology 2 - Section B

43.

The basal metabolic rate of most of the cells in the human body is directly under the control of:
1. TSH
2. Adrenaline
3. Cortisol
4. Iodothyronines

44.

The resting axonal membrane is:

1.	impermeable to the flux of both sodium and potassium ions
2.	freely permeable to the flux of both sodium and potassium ions
3.	relatively more permeable to the flux of potassium and nearly impermeable to the flux of sodium ions
4.	relatively more permeable to the flux of sodium and nearly impermeable to the flux of potassium ions

45.

The human placenta has endocrine functions that does not secrete:
1. prolactin
2. estrogens
3. progesterones
4. human chorionic gonadotropin (HCG)

46. Each time the sodium-potassium pump works, it pumps:
1. the anions as well with sodium to the outside
2. the anions as well with potassium to the inside
3. 3 sodium ions outwards
4. 3 potassium ions inwards

47.

Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.
1. Insulin
2. Glucagon
3. Secretin
4. Gastrin

48.

Follicles are found in the ovaries and:
1. anterior pituitary
2. testis
3. thyroid
4. pancreas

49. Identify the incorrectly matched pair:

1.	Medulla oblongata	Gastric secretions
2.	Hypothalamus	Control of body temperature
3.	Limbic system	Behaviour
4.	Association areas	Purely sensory areas in the cerebrum

50. What restores the resting membrane potential of the axonal membrane at the site of excitation?
1. Influx of sodium ions
2. Efflux of sodium ions
3. Influx of potassium ions
4. Efflux of potassium ions

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