The process of protein synthesis will be adversely affected by the deficiency of which of the following elements in plants despite adequate availability of nitrogen?
1. Potassium
2. Boron
3. Chlorine
4. Copper
Phosphorylation of glucose during glycolysis is catalysed by
1. Phosphoglucomutase | 2. Phosphoglucoisomerase |
3. Hexokinase | 4. Phosphorylase |
Statement I: | In C4 plants, photorespiration does not occur. |
Statement II: | C4 plants do not have RuBisCO in any of their cells. |
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 |
According to NCERT textbook, what is the number of ATP molecules that can be regarded as a net gain during aerobic respiration of one molecule of glucose?
1. 2 | 2. 30 |
3. 36 | 4. 38 |
The given diagram shows the scheme of:
1. Cyclic photophosphorylation and Y is NADPH
2. Cyclic photophosphorylation and Y is ATP
3. Non-Cyclic photophosphorylation and Y is NADPH
4. Non-Cyclic photophosphorylation and Y is ATP
1. | 0.03 to 0.04 | 2. | 0.04 to 0.05 |
3. | 0.05 | 4. | more than 0.05 |
1. | 6CO2 + 12H2O + light energy → C6H12O6 + 6O2+ 6H2O |
2. | 6CO2 + 6H2O + light energy → C6H12O6 + 6O2 |
3. | CO2 + H2O + light energy → [CH2O] + O2 |
4. | C6H12O6 + 6O2 → 6CO2 + 6H2O |
Majority of the nutrients that are essential for the growth and development of plants become available to the roots due to:
1. Microbial actions in the soil
2. Wet deposition from the atmosphere
3. Addition of fertilizers
4. Weathering and breakdown of rocks
Mycorrhiza is a symbiotic association of fungus with root system which helps in:
A. Absorption of water | B. Mineral nutrition |
C. Translocation | D. Gaseous exchange |
1. Only A | 2. Only B |
3. Both A and B | 4. Both B and C |
Consider the following events occurring during mass flow [pressure flow] of phloem sap at the source. The initial events are given in correct chronological sequence. But some of the statements carry mistakes regarding the principles of the process. Identify them:
I. The sucrose is passively transported to the companion cells of the smallest veins in the leaves.
II. The sucrose is actively transported from the companion cells to the sieve tube elements.
III. Water moves by osmosis from the nearby xylem in the same leaf vein.
IV. Hydrostatic pressure moves the sucrose and other substances through the sieve tube cells, towards a sink.
1. I and II only
2. III and IV only
3. I, II and III only
4. I, II, III and IV
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
1. Plasticity | 2. Norm of the reaction |
3. Development noise | 4. Acclimatisation |
The continued oxidation of acetyl CoA via the TCA cycle requires the continued replenishment of:
I. Oxaloacetic acid | II. NAD+ | III. FAD |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
The outputs of the Krebs cycle do not include:
1. NADP | 2. |
3. ATP | 4. |
Unlike a symporter and an antiporter, a uniporter:
1. is not an integral membrane protein
2. is a cell surface carbohydrate
3. is not a co-transporter
4. cannot be used for active transport
Gas exchange in the human lungs takes place across the respiratory membrane which is made up of:
1. alveolar macrophages and the alveolar cell membrane
2. alveolar cell membrane and its basement membrane
3. alveolar cell membrane and capillary membrane
4. alveolar cell membrane, capillary membrane, and fused basement membranes
An investment of loose connective tissue entering the liver with the portal vessels and sheathing the larger vessels in their course through the organ is termed as:
1. Falciform ligament
2. Glisson’s capsule
3. Cantlie’s line
4. Ligamentum teres
Arrange the following events in chronological sequence [first to last]:
1. protein-coated triacylglycerols enter lacteals
2. triacylglycerol coated with protein
3. fatty acids and glycerol packaged into micelles
4. bile salts emulsify fats
5. lipase digests fat
1. 1,2,4,5,3
2. 2,5,4,3,1
3. 3,5,4,1,2
4. 4,5,3,2,1
Which of the following is connected to the floor of the oral cavity by the frenulum?
1. oesophagus | 2. muscles of mastication |
3. lips | 4. tongue |
Intrinsic factor helps in the absorption of:
1. Amino acids
2. Sodium
3. Glucose
4. Vitamin B-12
Which of the following is not correctly matched?
I. | Thoracic chamber is formed dorsally by | Sternum |
II. | Thoracic chamber is formed ventrally by | Vertebral column |
III. | Thoracic chamber is formed laterally by | Ribs |
IV. | Thoracic chamber is formed on the lower side by | Diaphragm |
1. I and II only | 2. II only |
3. III and IV only | 4. I, II, III and IV |
I: | They can be used to increase the length of grape stalks. |
II: | They can elongate and improve the shape of apple. |
III: | They speed up malting process in brewing industry. |
IV: | They hasten the maturity period of juvenile conifers. |
V: | They promote bolting in many plants with rosette habit. |
1. 2 | 2. 3 |
3. 4 | 4. 5 |
Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes | 2. axons |
3. Schwann cells | 4. ependymal |
Under normal physiological conditions, what amount of oxygen is delivered to the tissues?
1. 4 ml | 2. 5 ml |
3. 15 ml | 4. 20 ml |
The type of joint seen between the carpal bones is:
1. Hinge | 2. Pivot |
3. Gliding | 4. Saddle |
The least common of WBCs in the human blood are:
1. Eosinophils | 2. Lymphocytes |
3. Neutrophils | 4. Basophils |
ATPase activity is found in:
1. | Myosin head | 2. | Myosin tail |
3. | G-Actin | 4. | Troponin |
Another name for lymph would be:
1. Extra-cellular fluid | 2. Tissue fluid |
3. Plasma ultrafiltrate | 4. Serous fluid |
The part of the sarcomere that is composed of only myosin myofilaments is:
1. | A band | 2. | I band |
3. | M line | 4. | H zone |
Uricotelic mode of passing out nitrogenous wastes is found in
1. reptiles and bird | 2. birds and annelids |
3. amphibians and reptiles | 4. insects and amphibians |
The reabsorption, from the filtrate, of sodium, glucose and amino acids:
1. involves the Bowman's capsule
2. is restricted to the loop of Henle
3. occurs mainly in the proximal convoluted tubules
4. occurs mainly by osmosis
Which of the following will not be equal in normal physiological conditions?
1. | Partial pressure of oxygen in deoxygenated blood and partial pressure of oxygen in tissues |
2. | Partial pressure of carbon dioxide in alveoli and partial pressure of carbon dioxide in oxygenated blood |
3. | Partial pressure of oxygen in oxygenated blood and partial pressure of oxygen in alveoli |
4. | Partial pressure of carbon dioxide in tissues and partial pressure of carbon dioxide in deoxygenated blood |
Presence of ketonuria and glycosuria is indicative of:
1. Renal failure | 2. Diabetes mellitus |
3. Nephrotic syndrome | 4. Renal stones |
The resting axonal membrane is impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charges proteins present in the axoplasm
1. I and II only | 2. I and III only |
3. II and III only | 4. I, II and III |
1. | The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes. |
2. | The ascending limb of loop of Henle is impermeable to water but allows transport of electrolytes actively or passively. |
3. | DCT is capable of reabsorption of bicarbonate ions and selective secretion of hydrogen and potassium ions and ammonia to maintain the pH and electrolyte balance in the body. |
4. | PCT does not play any role in reabsorption of bicarbonate ions and selective secretion of hydrogen and ammonia to maintain the pH and electrolyte balance in the body. |
If the atrioventricular node is damaged:
1. SA node would not develop action potential
2. atria will fail to contract
3. the impulse will not reach AV node
4. the impulse will not reach ventricles
Hypocalcaemia can lead to:
1. | Duchenne Muscular Dystrophy | 2. | Tetany |
3. | Renal calculi | 4. | Myasthenia gravis |
Some hormones can act on their target cells through second messengers. Identify the one that does not:
1. | cortisol | 2. | adrenaline |
3. | FSH | 4. | calcitonin |
A hormonal disorder that develops when pituitary gland produces too much growth hormone during adulthood is known as:
1. cretinism | 2. gigantism |
3. Conn’s syndrome | 4. acromegaly |
Identify the correct statement regarding the pineal gland or the hormone secreted by it:
1. | The gland is situated on the ventral side of the forebrain |
2. | The hormone secreted by the gland is called as melanin |
3. | The hormone regulates the diurnal rhythm of our body |
4. | The hormone decreases immunity |
In males, androgens like testosterone secreted by Leydig cells in testes do not:
1. regulate the development, maturation and functions of the male accessory sex organs
2. control the development and regulation of the secondary sexual characters
3. play a major stimulatory role in the process of spermatogenesis
4. produce catabolic effects on protein and carbohydrate metabolism
When one enters a dark room from a bright area:
1. retinol is converted to rhodopsin and eye sensitivity is decreased
2. rhodopsin is converted to retinol and eye sensitivity is decreased
3. rhodopsin is converted to retinol and eye sensitivity is increased
4. retinol is converted to rhodopsin and eye sensitivity is increased
Somatostatin from the hypothalamus:
1. stimulates secretion of insulin and glucagon by pancreas
2. inhibits secretion of insulin and glucagon by pancreas
3. stimulates secretion of growth hormone from anterior pituitary
4. inhibits secretion of growth hormone from anterior pituitary
In the ear, the utricle and the saccule are located in the:
1. cochlea | 2. semicircular canal |
3. spiral organ (organ of Corti) | 4. vestibule |
From outside to inside, the correct sequence of cells in the inner layer of human retina will be:
1. Photoreceptor cells, Bipolar cells, Ganglion cells
2. Ganglion cells, Bipolar cells, Photoreceptor cells
3. Photoreceptor cells, Ganglion cells, Bipolar cells
4. Ganglion cells, Photoreceptor cells, Bipolar cells