Test 15 (Class 11) - Type Recall (New NCERT)

Biology 1 - Section A

1. The colour/s of visible light that work/s least well for photosynthesis is/are:
1. Red and Blue
2. Violet and Yellow
3. Green
4. Yellow

2.

The maximum concentration of alcohol in beverages that are naturally fermented is about:

1. 5 – 8 %	2. 13 – 15 %
3. 33 – 34 %	4. 47 – 49 %

3.

Identify the incorrectly matched pair:

	PGR	Chemical nature
1.	Auxins	Indole compounds
2.	Cytokinin	Pyrimidine derivatives
3.	ABA	Carotenoid derivative
4.	Gibberellic acid	Terpenes

4. Water affects the process of photosynthesis in higher plants because:

I:	Water stress can cause the stomata to close, hence, reducing the carbon dioxide availability.
II:	Water stress also makes leaves wilt, thus, reducing the surface area of the leaves and their metabolic activity as well.

1.	Only I	2.	Only II
3.	Both I and II	4.	Neither I nor II

5.

Identify the incorrect statement regarding the arithmetic growth?

1.	Following mitosis, both daughter cells continue to divide
2.	Can be exemplified by root elongating at a constant rate
3.	On plotting the length of the organ against time, a linear curve is obtained
4.	Mathematically it is expressed as $L_{t} = L_{0} + rt$

6.

The bundle sheath cells are characterized by:

I:	a large number of chloroplasts present in them
II:	thick cell walls impervious to gas exchange
III:	large intercellular spaces

1. Only I and II	2. Only I and III
3. Only II and III	4. I, II and III

7.

The enzymatic machinery to partially oxidize glucose without the help of oxygen is present in:
1. All living organisms
2. All prokaryotes only
3. Prokaryotes and obligate anaerobes only
4. Facultative and obligate anaerobes only

8.

The $C_{3}$ pathway:

1.	is common to all plants
2.	takes place in mesophyll cells in C₄ plants
3.	takes place in bundle sheath cells in C₃ plants
4.	does not take place in CAM plants

9.

The electrons needed to replace those removed from PS I are provided by:

1.	The LHC	2.	Water
3.	NADPH	4.	PS II

10. The site of production of NADPH and ATP in a plant cell is:

1.	matrix of the mitochondria
2.	cristae of the mitochondria
3.	stroma of the chloroplast
4.	thylakoid membranes of the chloroplast

11. Consider the given two statements:

Assertion (A):	Accessory photosynthetic pigments in higher plants enable a wider range of wavelength of incoming light to be utilised for photosynthesis.
Reason (R):	Accessory pigments protect chlorophyll a from photo-oxidation.

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 but (R) is False.
4.	Both (A) and (R) are False.

12. Consider the given two statements:

Statement I:	Both photosynthesis and aerobic cellular respiration occur in plant cells but only aerobic cellular respiration occurs in animal cells.
Statement II:	Both photosynthesis and aerobic cellular respiration occur during the daylight hours, but only aerobic cellular respiration occurs at night.

1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is correct
3. Statement I is incorrect; Statement II is incorrect
4. Statement I is correct; Statement II is correct

13.

Which PGR is used to initiate flowering and for synchronizing fruit set in pineapple?

1.	Cytokinin	2.	ABA
3.	Ethylene	4.	GA

14.

At how many points in the TCA cycle is ${NAD}^{+}$ reduced to NADH + $H^{+}$ ?

1.	2	2.	3
3.	4	4.	6

15.

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is

1.	lactate dehydrogenase
2.	isocitrate dehydrogenase
3.	malate dehydrogenase
4.	succinate dehydrogenase

16. Consider the given two statements:

Statement I:	Splitting of the water molecule takes place on the outer side of the thylakoid membrane.
Statement II:	The NADP reductase enzyme is located on the inner side of the thylakoid membrane.

1.	Statement I is correct; Statement II is incorrect
2.	Statement I is incorrect; Statement II is correct
3.	Statement I is incorrect; Statement II is incorrect
4.	Statement I is correct; Statement II is correct

17. Regarding Complex I of the mitochondrial electron transport chain:

I:	It is composed of flavin mononucleotide (FMN) and an iron-sulfur (Fe-S)-containing protein.
II:	The enzyme in complex I is NADH dehydrogenase.
III:	It can pump four hydrogen ions across the membrane from the matrix into the intermembrane space.

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

Biology 1 - Section B

18.

Exchange of gases occurs across the respiratory membrane. Which of the following would increase the rate of diffusion of a gas across the respiratory membrane?

1.	respiratory membrane becomes thicker.
2.	surface area of the respiratory membrane decreases.
3.	partial pressure difference of the gas across the respiratory membrane increases.
4.	diffusion coefficient of the gas decreases.

19. The neural system:

I:	provides a point-to-point rapid coordination among organs.
II:	is fast but short-lived.
III:	innervate all cells of the body.

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

20. Calcium released into the sarcoplasm during muscle contraction:

1.	binds to the actin and myosin and makes them work together.
2.	breaks apart ATP to ADP and P.
3.	removes the tropomyosin block.
4.	causes the release of acetylcholine.

21. The trachea divides into a right and a left primary bronchus at the level of:
1. 2nd thoracic vertebra
2. 3rd thoracic vertebra
3. 5th thoracic vertebra
4. 12th thoracic vertebra

22. Regarding the chemical regulation of respiration in humans:

I:	A chemosensitive area is situated adjacent to the rhythm centre which is highly sensitive to CO₂ and hydrogen ions.
II:	Receptors associated with aortic arch and carotid artery can recognise changes in O₂concentration and send necessary signals to the rhythm centre for remedial actions.
III:	The role of oxygen in the regulation of respiratory rhythm is most significant.

1. Only I and II are correct
2. Only II and III are incorrect
3. I, II and III are incorrect
4. Only I and III are correct

23. Consider the given two statements:

I:	SA node is the natural pacemaker of the human heart.
II:	SA node is the only part of that nodal musculature that is auto-excitable.

1.	Only I is correct
2.	Only II is correct
3.	Both I and II are correct
4.	Both I and II are incorrect

24.

Regarding pulmonary capacities, the maximum volume of air a person can breathe in after a forced expiration can also be defined as:

1.	Total volume of air a person can inspire or expire after a normal inspiration or expiration
2.	Volume of air that will remain in the lungs after a normal expiration
3.	Maximum volume of air a person can breathe out after a forced inspiration
4.	Total volume of air accommodated in the lungs at the end of a forced inspiration

25. Consider the given two statements:

I:	The most widely used compound as source of ethylene is ethephon.
II:	Ethephon in an aqueous solution is readily absorbed and transported within the plant and releases ethylene slowly.

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

Biology 2 - Section A

26. Identify the correct statements regarding the sequence of events taking place during transmission of impulse across a chemical synapse as shown in the given figure:

I:	The action potential, generated due to the depolarization of the axonal membrane, arrives at the axon terminal.
II:	Potassium ions enter the synaptic knob.
III:	Synaptic vesicles are activated and release neurotransmitter in the synaptic cleft.
IV:	Neurotransmitter binds to the receptor on the post-synaptic membrane.

1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV

27.

The build-up of fats, cholesterol and other substances in and on the artery walls is known as:

1.	arteriosclerosis	2.	atherosclerosis
3.	aneurysm	4.	anastomosis

28.

Pulmonary fibrosis is a pathological hallmark of:

1.	Chronic obstructive lung disease
2.	Bronchial asthma
3.	Viral Pneumonia in children
4.	Occupational lung diseases

29. The joint between adjacent vertebrae in the vertebral column is a:
1. Fibrous joint
2. Cartilaginous joint
3. Gliding synovial joint
4. Condyloid synovial joint

30.

Exchange of nutrients and gases between the blood and the cells always occurs:

1.	by active transport
2.	with the help of transport carrier proteins
3.	at the arterial end of the capillary network
4.	through the interstitial fluid

31.

Cardiac activity could be moderated by the autonomic nervous system. Tick the correct answer:

1.	The parasympathetic system stimulates heart rate and stroke volume
2.	The sympathetic system stimulates heart rate and stroke volume
3.	The parasympathetic system stimulates heart rate but decreases stroke volume
4.	The sympathetic system stimulates heart rate but decreases stroke volume

32.

Skeletal muscles are:

1.	Striated, Multinucleate and Voluntary
2.	Non-Striated, Multinucleate and Voluntary
3.	Striated, Multinucleate and Involuntary
4.	Non-Striated, Uni-nucleate and Voluntary

33.

What is the percentage of atrial blood that flows into the ventricles without atrial systole?

1.	90	2.	70
3.	50	4.	30

34.

What happens during the contraction of a skeletal muscle fiber?

1.	The myosin filaments stay the same size but the actin filaments shorten
2.	The sarcomeres shorten
3.	The actin filaments stay the same size but the myosin filaments shorten
4.	Both actin and myosin filaments shorten

35.

In majority of the nephrons, the loop of Henle:
1. is absent
2. extends only a little into the medulla
3. extends deep into the medulla
4. is associated with a highly developed vasa recta

36.

Filtration slits in the glomerular membrane are formed by:
1. The capillary endothelial cells
2. The basement membrane
3. The podocyte cells
4. Mesangial cells

37.

Identify the incorrect statement regarding the enzyme carbonic anhydrase:

1.	RBCs contain a very high concentration of this enzyme
2.	The enzyme is absent in the plasma
3.	It facilitates the reaction catalyzed in both directions
4.	It is a metalloenzyme

38. The osmolarity of interstitial fluid in renal cortex of vertebrates is about _____ mOsm per litre, which can be increased to about _______ mOsm per litre in the inner medulla during concentration of urine by the kidneys.

1.	1200, 300	2.	300, 1200
3.	300, 600	4.	600, 300

39. Each time the sodium-potassium pump functions, it actively transports:

1.	3 sodium ions outwards and 2 potassium ions into the cell.
2.	3 sodium ions into the cells and 2 potassium outwards.
3.	2 sodium ions outwards and 3 potassium ions into the cell.
4.	2 sodium ions into the cells and 3 potassium ions outwards.

40.

Collecting duct does not:

I:	allow reabsorption of large amount of water during concentration of urine.
II:	allow passage of small amounts of urea into medullary interstitium to keep up the osmolarity.
III:	play a role in the maintenance of pH and ionic balance of blood by the selective secretion of H⁺ and K⁺ ions.

1.	Only I and II	2.	Only III
3.	Only II	4.	I, II and III are incorrect

41.

The sinoatrial node is the normal pacemaker of the human heart because it:

1.	can form action potentials that can spread throughout the rest of the heart
2.	depolarizes to its threshold potential before other pacemakers in the heart
3.	is located in the top of right atrial wall
4.	is most likely to form an ectopic focus

42.

Situated between the two hip bones of the pelvis, sacrum is a triangular bone in the lower back formed from fusion of:

1.	3 vertebrae	2.	5 vertebrae
3.	7 vertebrae	4.	12 vertebrae

Biology 2 - Section B

43.

Hormones are chemical messengers of all classes except:

1.	peptide	2.	steroid
3.	aminated	4.	carbohydrate

44. Identify the correct statement from the following:

I:	The adrenal cortical hormones are commonly called as corticoids.
II:	Cortisol is the main glucocorticoid and aldosterone the main mineralocorticoid in our body.
III:	Small amounts of androgenic steroids are also secreted by the adrenal cortex.

1.	Only II and III	2.	Only I and II
3.	I, II and III	4.	Only II

45.

What would be the result of hypoadrenalism [Addison’s disease]?

1.	Decreased blood concentrations of cortisol and aldosterone, and increased concentrations of CRH and ACTH
2.	Decreased blood concentrations of epinephrine and norepinephrine, and no change in concentrations of CRH and ACTH
3.	Decreased blood concentrations of thyroid hormones, and increased concentrations of TRH and TSH
4.	Increased blood concentrations of cortisol and aldosterone, and decreased concentrations of CRH and ACTH

46.

Which of the following endocrine glands is under direct neural regulation of hypothalamus?

1.	Pineal	2.	Adrenal medulla
3.	Posterior pituitary	4.	Anterior pituitary

47. Consider the two statements:

Statement I:	The cerebral hemispheres are connected by a tract of nerve fibres called corpus striatum.
Statement II:	The layer of cells which covers the cerebral hemisphere is called cerebral cortex.

1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct

48.

Identify the incorrectly matched pair:

1.	Hyposecretion of growth hormone in childhood	Dwarfism
2.	Hyposecretion of growth hormone in adulthood	Cretinism
3.	Hypersecretion of growth hormone in childhood	Gigantism
4.	Hypersecretion of growth hormone in adulthood	Acromegaly

49. Different types of ion channels are present on the neural membrane. When a neuron is not conducting any impulse:

I:	the axonal membrane is comparatively more permeable to potassium ions and nearly impermeable to sodium ions.
II:	the axonal membrane has an excess of negative charge on the outside and an excess of positive charge just on the inside of the membrane.
III:	the axonal membrane is impermeable to negatively charged proteins present in the axoplasm.

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.

Match each item in Column I [part of the brain] with one in Column II [function] and select the answer from the codes given below:

	Column I		Column II
A.	Medulla oblongata	a.	Motor control
B.	Pons varoli	b.	Hunger center
C.	Cerebellum	c.	Bridge between cerebellum and rest of brain
D.	Hypothalamus	d.	Gastric secretions, respiratory rhythm center

Codes

	A	B	C	D
1.	c	d	b	a
2.	d	c	a	b
3.	c	d	a	b
4.	d	c	b	a

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