Test 8 (Class 11) - Type Bio SCAN (New NCERT)Contact Number: 9667591930 / 8527521718
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Biology 1 - Section A
1.
Identify the correct statements regarding the mitochondrial electron transport system.
I. Electrons from NADH in mitochondrial matrix are first transferred to [Fe-S] and then to FMN in complex I
II. Complex II is not a proton pump
III. Cytochrome c is located on the outer surface of the inner membrane
IV. Ubiquinone, located within the inner mitochondrial membrane, is oxidized with the transfer of electrons to cytochrome c via complex III.
| 1. | Only II and III | 2. | Only II, III and IV |
| 3. | Only IV | 4. | Only I and III |
2.
The ʺnetʺ products of glycolysis are:
1. , , 2 pyruvate, 2 ATP, and .
2. , , 2 ATP, and 2 pyruvate
3. , 2 pyruvate, 4 ATP, and .
4.2 NADH, , 2 pyruvate, 2 ATP, and .
3.
Identify the correct statements amongst the following:
I. Auxins and cytokinins act antagonistically in regulating axillary bud growth
II. Gibberellins act in concert with auxin to promote stem elongation
III. In most situations, Abscisic acid acts as an antagonist to gibberellins.
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
4.
The correct sequence of flow of electron during light dependent reactions in plants is:
1. P680 → P700 → water → NADP+
2. water → P700 → NADP+→ P680
3. P700 → P680 → NADP+→ water
4. water → P680 → P700 → NADP+
5.
Pyruvate dehydrogenase activity during aerobic respiration requires:
1. Calcium
2. Iron
3. Cobalt
4. Magnesium
6.
For the synthesis of one glucose molecule, the number of ATP and NADPH used in Calvin cycle respectively are:
1. 12 and 12
2. 12 and 18
3. 18 and 12
4. 18 and 18
7.
Study the pathway given below:
In which of the following options, correct words for all the three blanks A, B and C are indicated?
| A | B | C | |
| 1. | Fixation | Transamination | Regeneration |
| 2. | Fixation | Decarboxylation | Regeneration |
| 3. | Carboxylation | Decarboxylation | Reduction |
| 4. | Decarboxylation | Reduction | Regeneration |
8.
Assertion: Action spectrum of photosynthesis is much broader than the absorption spectrum of chlorophyll a.
Reason: Accessory pigments with different absorption spectra are also present in chloroplasts.
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.
9.
Though chlorophyll a is the major pigment responsible for trapping light, other thylakoid pigments called accessory pigments are also involved. The accessory pigments:
I. Include xanthophylls and carotenoids but not chlorophyll b
II. Absorb light and transfer electrons to chlorophyll a
III. Enable a wider range of wavelength of incoming light to be reflected by green leaves
IV. Make Chlorophyll a more prone to photo-oxidation
The incorrect statements include:
| 1. | Only I and II | 2. | Only III and IV |
| 3. | Only I, III and IV | 4. | I, II, III and IV |
10. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion(A): | The maximum concentration of alcohol in beverages that are naturally fermented with yeast is about 13%. |
| Reason(R): | In alcohol fermentation, yeast converts pyruvic acid to ethanol and carbon dioxide. |
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. |
11.
In a photosystem:
| 1. | The reaction centre is where light is captured, while the antenna complex is where this light energy is transformed into chemical energy. |
| 2. | The antenna complex is where light is captured, while the reaction centre is where this light energy is transformed into chemical energy. |
| 3. | The antenna complex is where light energy is captured and transformed into chemical energy. |
| 4. | The reaction centre is where light energy is captured and transformed into chemical energy. |
12.
What would be true when comparing the processes of anaerobic respiration and fermentation?
I. Both processes do not use oxygen.
II. An electron transport chain is used in anaerobic respiration but not in fermentation.
| 1. | Only I | 2. | Only II |
| 3. | Neither I nor II | 4. | Both I and II |
13.
Which one of the following growth regulators is known as the stress hormone?
1. Abscisic acid
2. Ethylene
3. GA3
4. Indole acetic acid
14.
Oxidative phosphorylation in mitochondria is driven by energy from:
1. Sunlight
2. NADH
3. FADH2
4. Chemiosmosis of protons
15.
The mitochondrial electron transport chain is located in:
1. The outer membrane
2. The inner membrane
3. The inter-membrane space
4. Stroma
16.
In the citric acid cycle, succinate is oxidized to fumarate by an enzyme located in the:
1. outer mitochondrial membrane
2. intermembrane space
3. inner mitochondrial membrane
4. matrix
17. In the tricarboxylic acid cycle, what are the respective numbers for – decarboxylation steps, substrate level phosphorylation and points at which FADH2 is produced [calculate for oxidation of one molecule of pyruvic acid]?
| 1. | 3, 2 and 1 | 2. | 2, 1 and 1 |
| 3. | 3, 1 and 2 | 4. | 2, 2 and 2 |
Biology 1 - Section B
18.
The partial pressure of oxygen in the alveoli of the lungs is
1. equal to that in the blood
2. more than that in the blood
3. less than that in the blood
4. less than that of carbon dioxide
19.
Consider the following statements:
| I: | Trypsinogen is activated by enterokinase. |
| II: | Goblet cells secrete mucus. |
| III: | Bile pigments help in emulsification of fats. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
20. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion(A): | Spraying sugarcane crops with gibberellins increase the yield by as much as 20 tonnes per acre. |
| Reason(R): | Sugarcane stores carbohydrates such as sugar in their stems. |
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. |
21.
Cells of human body exhibit three main types of movements. Cytoskeleton elements called microfilaments play an important role in:
A. Amoeboid movements
B. Ciliary movements
C. Muscular movements
| 1. | Only A | 2. | Only A and B |
| 3. | Only A and C | 4. | A, B and C |
22.
Identify the correctly matched pair:
| Part of the pituitary | Hormone synthesized | |
| I. | Pars distalis | Gonodotropin releasing hormone |
| II. | Pars intermedia | Melanocyte stimulating hormone |
| III. | Pars nervosa | ADH and oxytocin |
| 1. | Only III | 2. | Only II |
| 3. | Only I and II | 4. | Only II and III |
23.
An excessive loss of both salt and body fluids caused for example, by a major wound, will lead to:
I.Increased secretion of ADH in the body
II.Activation of the Renin-Angiotensin-Aldosterone mechanism
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
24.
Arrange the following modes of transport of carbon dioxide in the blood from the most common to the least common.
1. bicarbonate ions
2. combined with blood proteins
3. dissolved in plasma
Choose the arrangement that lists them in the correct order from largest to smallest percentage of carbon dioxide transported.
1. 1, 2, 3
2. 1, 3, 2
3. 2, 3, 1
4. 2, 1, 3
25.
Consider the given two statements:
I. Generally, phenotypic plasticity is more important for immobile organisms (e.g. plants) than mobile organisms (e.g. most animals).
II. Plants follow different pathways in response to environment or phases of life to form different kinds of structures.
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. Both I and II are incorrect
Biology 2 - Section A
26.
All the following are related to the limbic system in the human brain except:
| 1. | Amygdala | 2. | Hippocampus |
| 3. | Olfactory bulb | 4. | Corpus callosum |
27.
Angina pectoris is:
1. an intravascular clot
2. a symptom of decreased oxygen supply to the heart muscles
3. shortness of breath due to pulmonary congestion
4. the most common cause of a cardiac arrest
28.
In the given diagram of the oxygen dissociation curve, under normal physiological conditions, the partial pressure of oxygen at the tissue level is represented by:
1. A
2. B
3. C
4. D
29.
Assertion: The first seven rib pairs known as the fixed or vertebrosternal ribs are the true ribs.
Reason: Only the first seven rib pairs are made up of bone while others are made of cartilage.
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.
30.
During the cardiac cycle the tricuspid and bicuspid valves get closed when:
1. when pressure inside the ventricles is at its lowest
2. when pressure inside the atria is greater than that inside the ventricles
3. when ventricular pressure exceeds that of the atria
4. when pressure is greater in the aorta than in the left ventricle
31.
What percentage of the ventricular filling is contributed by the atrial contraction?
1. 30
2. 50
3. 70
4. 100
32.
Gliding joint is present between:
1. carpals
2. phalanges
3. metacarpals
4. coxal bones
33.
Which of the following will be regarded as a normal thrombocyte count?
1. 1 million per cubic cc
2. 200,000 per cubic mm
3. 1 million per cubic mm
4. 10,000 per cubic mm
34.
Consider the following statements:
I. A motor neuron alongwith the musclefibres connected to it constitute a motorunit.
II. The neurotransmitter released at the neuro-muscular junction is Acetylcholine.
III. Mysosin head has ATPase activity.
Which of the above statements are true?
1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
35.
Glomerular ultrafiltrate would normally not contain:
1. plasma proteins
2. glucose and amino acids
3. water
4. urea
36.
What structure projects between the afferent arteriole and efferent arteriole next to Bowman's capsule to form the juxtaglomerular apparatus?
1. glomerulus
2. arcuate arteries
3. proximal tubule
4. distal tubule
37.
What is vital capacity of our lungs?
1. Inspiratory reserve volume plus tidal volume
2. Total lung capacity minus expiratory reserve volume
3. Inspiratory reserve volume plus expiratory reserve volume
4. Total lung capacity minus residual volume
38.
Match the following parts of a nephron with their function:
| (a) | Descending limb of Henle's loop | (i) | Reabsorption of salts only |
| (b) | Proximal convoluted tubule | (ii) | Reabsorption of water only |
| (c) | Ascending limb of Henle's loop | (iii) | Conditional reabsorption of sodium ions |
| (d) | Distal convoluted tubule | (iv) | Reabsorption of ions, water, and organic nutrients |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | i | iii | ii | iv |
| 2. | ii | iv | i | iii |
| 3. | i | iv | ii | iii |
| 4. | iv | i | iii | ii |
39.
Hypothalamus:
| 1. | is a basal part of the telencephalon, forebrain. |
| 2. | contains several groups of neurosecretory cells called nuclei which produce hormones |
| 3. | is connected to the neurohypophysis by a portal circulation |
| 4. | is the location of the respiratory rhythm center |
40.
Consider the following statements:
| I: | Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic. |
| II: | Mammals, many terrestrial amphibians and cartilaginous fishes are ureotelic. |
| III: | Reptiles, birds, land snails and insects are uricotelic. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
41.
The following is the diagrammatic representation of standard ECG. Identify the correct statement:
1. P is caused by atrial repolarization
2. Q, when present, always shows myocardial ischemia
3. QRS complex is due to time taken by impulse from SA node to AV node
4. T is caused by ventricular repolarization
42.
Glenoid cavity articulate
1. Clavicle with acromion
2. Scapula with acromion
3. Clavicle with scapula
4. Humerus with scapula
Biology 2 - Section B
43.
Match the following columns and select the correct option:
| Column I | Column II | ||
| (a) | Pituitary gland | (i) | Grave's disease |
| (b) | Thyroid gland | (ii) | Diabetes mellitus |
| (c) | Adrenal gland | (iii) | Diabetes insipidus |
| (d) | Pancreas | (iv) | Addison's disease |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (iii) | (i) | (iv) | (ii) |
| 3. | (ii) | (i) | (iv) | (iii) |
| 4. | (iv) | (iii) | (i) | (ii) |
44.
Identify A, B and C in the diagrammatic representation of the mechanism of hormone action.
Select the correct option from the following:
| 1. | A = Steroid Hormone; B = Hormone receptor Complex; C = Protein |
| 2. | A = Protein Hormone; B = Receptor; C = Cyclic AMP |
| 3. | A = Steroid Hormone; B = Receptor; C = Second Messenger |
| 4. | A = Protein Hormone; B = Cyclic AMP; C = Hormone-receptor Complex |
45.
Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?
| 1. | Estrogen | 2. | Prolactin |
| 3. | Oxytocin | 4. | Relaxin |
46.
Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.
| Gland | Secretion | Effect on Body |
| A | Oestrogen | Maintenance of secondary sexual characters |
| Alpha cells of islets of Langerhans | B | Raises blood sugar level |
| Anteriorpituitary | C | Oversecretion leads to gigantism |
| Options: | A | B | C |
| 1. | Placenta | Insulin | Vasopressin |
| 2. | Ovary | Insulin | Calcium |
| 3. | Placenta | Glucagon | Calcitonin |
| 4. | Ovary | Glucagon | Growth hormone |
47.
The thermostat of human body is located in:
1. Hypothalamus
2. Cerebrum
3. Cerebellum
4. Thalamus
48. Which of the following statements is correct in relation to the endocrine system?
| 1. | Organs in the body like the gastrointestinal tract, heart, kidney and liver do not produce any hormones. |
| 2. | Non-nutrient chemicals produced by the body in trace amounts that act as intercellular messengers are known as hormones. |
| 3. | Releasing and inhibitory hormones are produced by the pituitary gland. |
| 4. | Adenohypophysis is under direct neural regulation of the hypothalamus. |
49.
A major coordinating center in the human brain for sensory and motor signaling to and from the cerebrum is:
1. Cerebellum
2. Thalamus
3. Pons Varolii
4. Hypothalamus
50.
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 |
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