Mark the following statements as true (T) or false (F) and select the correct option :
A: | Acrocentric chromosome appears J-shaped during anaphase. |
B: | Centromere holds two chromatids together. |
C: | Outer membrane of nucleus is connected with SER only. |
A | B | C | |
1. | T | F | F |
2. | F | T | T |
3. | T | T | F |
4. | F | F | T |
Read the below given statements and select the correct option.
A: | In 70S ribosome, S stands for sedimentation coefficient. |
B: | Only prokaryotes have 70S ribosomes. |
1. | Only A is correct |
2. | Only B is correct |
3. | Both A and B are correct |
4. | Both A and B are incorrect |
State the following statements as true (T) or false (F) and select the correct option.
A. | Integral proteins are partially or totally buried in the membrane. |
B. | Human RBC membrane has approximately 52% proteins. |
C. | Proteins move laterally within overall bilayer of membrane. |
A | B | C | |
1. | T | T | T |
2. | F | T | F |
3. | T | F | T |
4. | F | F | T |
Read the following statements and choose the correct option:
Statement I: | Polar molecules cannot pass through lipid bilayer of plasma membrane by self. |
Statement II: | Polar molecules require carrier proteins to facilitate their transport across the membrane. |
1. Both Statements I and II are correct
2. Both Statements I and II are incorrect
3. Only Statement I is correct
4. Only Statement II is correct
Select the correct option based on statements below:
Assertion (A): | Plasmids are extrachromosomal DNA. |
Reason (R): | Plasmids are found in bacteria and are useful in genetic engineering. |
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. |
In the following diagram, select the part correctly matched with its character or function.
1. | A - The passage through the movement of RNA and protein molecules take place in both directions |
2. | B - Frequently observed in cells actively involved in lipids synthesis and secretion |
3. | C - Membrane-bound structures composed of deoxyribonucleic acid and proteins |
4. | D - Provide surface for DNA and protein synthesis |
The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D). Select the part correctly matched with its function.
1. | Part (A) : Matrix – a major site for respiratory chain enzymes |
2. | Part (D) : Outer membrane – gives rise to the inner membrane by splitting |
3. | Part (B) : Inner membrane – forms infoldings called cristae |
4. | Part (C) : Cristae – possess single circular DNA molecule and ribosome |
Which one of the following organelle in the figure correctly matches with its function?
1. | Golgi apparatus, protein synthesis |
2. | Golgi apparatus, formation of glycolipids |
3. | Rough endoplasmic reticulum, protein synthesis |
4. | Rough endoplasmic reticulum, formation of gIycoproteins |
Mark the mismatched pair.
1. |
Amyloplast |
(i) |
Store protein granule |
2. |
Elaioplast |
(ii) |
Store oils or fats |
3. |
Chloroplasts |
(iii) |
Contain chlorophyll pigments |
4. |
Chromoplasts |
(iv) |
Contain colored pigments other than chlorophyll |
Select the correct matching among the following pairs.
1. | Smooth ER-Oxidation of phospholipids |
2. | Smooth ER-Synthesis of lipids |
3. | Rough ER-Synthesis of glycogen |
4. | Rough ER-Oxidation of fatty acids |