| Assertion (A): | FSH which interacts with membrane-bound receptors does not enter the target cell. |
| Reason (R): | Binding of FSH to its receptors generates a second messenger (cyclic AMP) for its biochemical and physiological responses. |
| 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. | (A) is False but (R) is True. |
| 1. | Scoliodon | 2. | Hippocampus |
| 3. | Chelone | 4. | Pteropus |
| Assertion (A): | During pregnancy, the level of thyroxine is increased in the maternal blood. |
| Reason (R): | Pregnancy is characterised by metabolic changes in the mother. |
| 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. | (A) is False but (R) is True. |
| (a) | Bones support and protect softer tissues and organs |
| (b) | Weight bearing function is served by limb bones |
| (c) | Ligament is the site of production of blood cells. |
| (d) | Adipose tissue is specialised to store fats. |
| (e) | Tendons attach one bone to another. |
| 1. | (a), (b) and (d) only | 2. | (b), (c) and (e) only |
| 3. | (a), (c) and (d) only | 4. | (a), (b) and (e) only |
| (a) | Keys are based on the similarities and dissimilarities. |
| (b) | Key is analytical in nature. |
| (c) | Keys are based on the contrasting characters in pair called couplet. |
| (d) | Same key can be used for all taxonomic categories. |
| (e) | Each statement in the key is called Lead. |
| 1. | (a), (b) and (c) only | 2. | (b), (c) and (d) only |
| 3. | (a), (b), (c) and (e) only | 4. | (a), (c), (d) and (e) only |
| (a) | Haemophilic son and haemophilic daughter. |
| (b) | Haemophilic son and carrier daughter. |
| (c) | Normal daughter and normal son. |
| (d) | Normal son and haemophilic daughter. |
| 1. | (a) and (b) only | 2. | (b) and (c) only |
| 3. | (a) and (d) only | 4. | (b) and (d) only |
| 1. | 5' AUG 3' | 2. | 5' ATG 3' |
| 3. | 5' GTA 3' | 4. | 5' GUA 3 |
| (a) | IUDs decrease phagocytosis of sperm within the uterus. |
| (b) | The released copper ions suppress the sperm motility. |
| (c) | IUDs do not make the cervix hostile to the sperm. |
| (d) | IUDs suppress the fertilization capacity of sperm. |
| (e) | The IUDs require surgical intervention for their insertion in the uterine cavity. |
| 1. | (a), (d) and (e) only | 2. | (b) and (c) only |
| 3. | (b) and (d) only | 4. | (d) only |
| (a) | Agarose is a natural polymer obtained from sea-weed. |
| (b) | The separation of DNA molecules in agarose-gel electrophoresis depends on the size of DNA. |
| (c) | The DNA migrates from negatively-charged electrode to the positively-charged electrode |
| (d) | The DNA migrates from positively-charged electrode to the negatively-charged electrode. |
| 1. | (a) and (b) only | 2. | (a), (b) and (c) only |
| 3. | (a), (b) and (d) only | 4. | (b), (c) and (d) only |