The structures that are formed by stacking of organised flattened membranous sacks in the chloroplasts are:
1. | α ketoglutaric acid | 2. | Oxaloacetic acid |
3. | Succinic acid | 4. | Malic acid |
Photosynthetically active radiation (PAR) represents the following range of wavelengths:
1. 450-950 nm
2. 340-450 nm
3. 400-700 nm
4. 500-600 nm
The products of three turns of Kreb’s cycle will be:
1. 1 ATP, 2 CO2, 3 NADH, and 1 FADH2
2. 3 ATP, 3 CO2, 3 NADH, and 3 FADH2
3. 3 ATP, 6 CO2, 9 NADH, and 3 FADH2
4. 38 ATP, 6 CO2, 3 NADH, and 12 FADH2
Photorespiration is avoided by C4 plants primarily because:
1. They do not participate in the Calvin cycle.
2. They use PEP carboxylase to initially fix CO2.
3. They conserve water more efficiently.
4. They are adapted to cold, wet climates.
How many ATP molecules could maximally be generated from one molecule of glucose if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
1. | Two | 2. | Thirty |
3. | One | 4. | Fifty-seven |
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 |
In which one of the following processes CO2 is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation
Assertion: The primary function of kranz anatomy is to provide a site in which can be concentrated around RuBisCO, thereby avoiding photorespiration.
Reason: The mesophyll cells have a suberized cell wall and have a low conductance for .
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.
I: | The water-splitting complex is located on the inner side of the thylakoid membrane |
II: | The NADP reductase enzyme is located on the stromal side of the thylakoid membrane |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Immediately after light becomes unavailable, the biosynthetic phase of photosynthesis continues for some time and then stops. If then, light is made available, the synthesis starts again. A logical conclusion of these observations will include:
I. Biosynthetic phase does not directly depend on the presence of light.
II. Biosynthetic phase depends on the products of light reactions.
III. Biosynthesis phase occurs only in the dark or in the absence of light.
1. | Only I and II | 2. | Only III |
3. | Only II | 4. | I, II and III |
With respect to the steps of glycolysis at which utilization or synthesis of ATP or NADH takes place, Identify the incorrect match:
1. |
Production of ATP |
BPGA to 3-PGA |
2. |
Utilization of ATP |
Fructose-6-phosphate to Fructose-1,6-biphosphate |
3. |
Production of NADH |
PGAL to BPGA |
4. |
Utilization of NADH |
3-PGA to 2-PGA |
During oxygenic photosynthesis in chloroplasts, the liberated oxygen comes from ______ and the reactions leading to its liberation are associated with ______.
1. CO2, PS II
2. H2O, PSII
3. CO2, Calvin cycle
4. H2O, PS I
Assertion (A): | Growth, at a cellular level, is measured by a variety of parameters such as increase in fresh weight, dry weight, length, area, volume and cell number. |
Reason (R): | Such parameters are more or less proportional to the increase in protoplasm which is primarily responsible for growth at cellular level. |
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. |
Carbon dioxide provided to a C4 plant is radioactively labeled. As the photosynthesis in this plant gets underway, radioactivity if expected to occur first in:
1. Oxaloacetic acid
2. PEP
3. Malic acid
4. RuBP
I: | The reaction centre chlorophyll a in PS I is called P700 |
II: | Oxygen evolving complex is associated with PS II |
III. | Both ATP and NADPH are made during cyclic photophosphorylation |
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 |
1. | Aldopentose sugar | 2. | Ketopentose sugar |
3. | Aldohexose sugar | 4. | Ketohexose sugar |
Consider the two statements:
I. Hydroponically grown plants would grow much slower if they were not sufficiently aerated.
II. Oxygen is not soluble in water.
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
The structure shown in the given diagram is a:
1. Muscle fibre
2. Myofibril
3. Myofilament
4. Myoblasts
Who coined the term 'Kinetin'?
1. Skoog and Miller
2. Darwin
3. Went
4. Kurosawa
Numbers of molecules of oxygen and carbon dioxide that can bind to haemoglobin respectively are:
1. 1 and 4
2. 4 and 1
3. 4 and 4
4. 4 and 2
Which hormone is responsible for fruit ripening:
1. Ethylene
2. Auxin
3. Ethyl chloride
4. Cytokinin
Persons with AB blood type can:
1. | donate blood to persons with all blood types as neither A nor B antigens are present on their RBCs |
2. | receive blood from persons with all blood types as both A and B antigens are present on their RBCs |
3. | receive blood from persons with all blood types as neither A nor B antigens are present on their RBCs |
4. | receive blood from persons with all blood types as neither anti-A nor anti-B antibodies are present on his blood plasma |
One of the commonly used plant growth hormone in tea plantations is:
1. | Abscisic acid | 2. | Zeatin |
3. | Indole-3- acetic acid | 4. | Ethylene |
Hormones that interact with membrane-bound receptors, do not enter the target cell but generate second messengers which in turn regulate cellular metabolism. An example of such a hormone would be:
1. Adrenocorticotrophic hormone
2. Triiodothyronine
3. Progesterone
4. Cortisol
The neurotransmitter released by the motor neuron at the neuromuscular junction is:
1. Adrenaline
2. Dopamine
3. Acetylcholine
4. Gamma-aminobutyric acid
Globulins contained in human blood plasma are primarily involved in
1. Clotting of blood
2. Defense mechanisms of body
3. Osmotic balance of body fluids
4. Oxygen transport in the blood
If the SA node is not functional in a human being, his ECG would not show:
1. P wave
2. QRS complex
3. ST segment
4. T wave
1. birds and annelids
2. amphibians and reptiles
3. insects and amphibians
4. reptiles and birds
In the nodal tissue of the human heart the last to get activated is/are:
1. SA node
2. AV node
3. AV bundle
4. Purkinje fibers
The maximum volume of air a person can breathe in after a forced expiration is known as :
1. Expiratory Capacity
2. Vital Capacity
3. Inspiratory Capacity
4. Total Lung Capacity
The pivot joint between the atlas and axis is a type of
1. fibrous joint
2. cartilaginous joint
3. synovial joint
4. saddle joint
Blood pressure in the mammalian aorta is maximum during:
Consider the two statements:
I. For breathing it is essential that human lungs are situated in an air tight thoracic chamber.
II. We cannot directly alter the pulmonary volume.
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. Only I is correct
4. Both I and II are incorrect
1. | Henle’s loop – most reabsorption of the major substances from the glomerular filtrate |
2. | Distal convoluted tubule – reabsorption of ions into the surrounding blood capillaries |
3. | Afferent arteriole – carries the blood away from the glomerulus towards renal vein |
4. | Podocytes - create minute spaces (slit pores) for the filtration of blood into the Bowman’s capsule |
In human body, which one of the following is anatomically correct?
1. Floating ribs-2 pairs
2. Collar bones-3 pairs
3. Salivary glands-1 pair
4. Cranial nerves-10 pairs
Glenoid cavity articulates:
The main respiratory center in humans is located in:
1. Hypothalamus
2. Thalamus
3. Medulla oblongata
4. Pons
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
1. Purkinje system
2. Sinoatrial node
3. Atrioventricular node
4. Atrioventricular bundle
The trachea divides into a right and a left primary bronchi at the level of:
1. 3rd thoracic vertebra
2. 5th thoracic vertebra
3. 7th thoracic vertebra
4. 12th thoracic vertebra
The amount of carbon dioxide removed by our lungs per day would be approximately:
1. 200 L
2. 288 L
3. 336 L
4. 424 L
Under normal physiological conditions, the glomerular ultrafiltrate should not contain:
1. Urea
2. Bicarbonate ions
3. Proteins
4. Glucose
MSH is secreted by:
1. Anteria lobe of the pituitary
2. Middle lobe of the pituitary
3. Posterior lobe of the pituitary
4. Endostyle
Unmyelinated neurons:
1. are surrounded by Schwann cells and a discontinuous myelin sheath
2. are surrounded by Schwann cells that do not secrete a myelin sheath
3. are not surrounded by Schwann cells or a myelin sheath
4. are surrounded by a discontinuous myelin sheath but no Schwann cells
Which one of the following is not a second messenger in hormone action?
1. cGMP
2. Calcium
3. Sodium
4. cAMP
Which part of human brain is concerned with the regulation of body temperature?
1. Cerebellum
2. Cerebrum
3. Hypothalamus
4. Medulla oblongata
Oxytocin mainly helps in:
1. Milk production
2. Childbirth
3. Diuresis
4. Gametogenesis
Match the following hormones with the respective disease:
(a) Insulin | (i) Addison's disease |
(b) Thyroxin | (ii) Diabetes insipidus |
(c) Corticoids | (iii) Acromegaly |
(d) Growth Hormone | (iv) Goitre |
(v) Diabetes mellitus |
Select the correct option.
(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (v) (i) (ii) (iii)
3. (ii) (iv) (iii) (i)
4. (v) (iv) (i) (iii)
1. | Foramen of Monroe | 2. | Cerebral aqueduct of Sylvius |
3. | Corpus callosum | 4. | Cerebellar peduncles |
Each time the sodium potassium pump functions, it pumps:
1. 3 Na+ ions to the inside and 2 K+ ions to the outside
2. 3 Na+ ions to the outside and 2 K+ ions to the inside
3. 2 Na+ ions to the inside and 3 K+ ions to the outside
4. 2 Na+ ions to the outside and 3 K+ ions to the inside