Consider the two statements:
Assertion (A): | The cells of testes and ovaries have abundance of Smooth Endoplasmic Reticulum. |
Reason (R): | The cells of testes and ovaries secrete steroid hormones. |
1. | Both (A) and (R) are true and (R) correctly explains (A). |
2. | (A) is true but (R) is False. |
3. | Both (A) and (R) are true but the (R) does not explain (A). |
4. | (A) is false but Reason is true. |
I: | is an important site of formation of glycoproteins and glycolipids. |
II: | is not a part of the endomembrane system of a eukaryotic cell. |
Statement I: | The content of nucleolus is continuous with the rest of the nucleoplasm as it is not a membrane bound structure. |
Statement II: | The outer nuclear membrane usually remains continuous with the endoplasmic reticulum but does not bear ribosomes on it. |
1. | contains water, sap, excretory product and other materials not useful for the cell. |
2. | store enzymes capable of digesting carbohydrates, proteins, lipids and nucleic acids. |
3. | are formed by engulfing the food particles. |
4. | are important for osmoregulation and excretion. |
I: | Centromere placement very close to the top, p arms not visible |
II: | q arms are much longer than the p arms. |
III: | p and q arms are very close in length but not equal. |
IV: | p and q arms are equal in length. |
A: | I is Acrocentric and II is Telocentric |
B: | III is Metacentric and IV is Sub-metacentric |
C: | I is Telocentroic and II is Acrocentric |
D: | III is sub-metacentric and IV is Metacentric |
Statement I: | Mature sieve tube elements of vascular plants and mature human erythrocytes are not considered as ‘living’ cells. |
Statement II: | Mature sieve tube elements of vascular plants and mature human erythrocytes lack a nucleus. |
I | Chloroplasts | contain chlorophyll and carotenoid pigments |
II | Amyloplasts | store carbohydrates |
III | Elaioplasts | store oils and fats |
IV | Aleuroplasts | store proteins |