Q. No.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
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 |
In plant vacuole, the A facilitates transport of a number of ions and other materials against concentration gradient.
Complete the above statement by choosing the correct option.
1. Tonoplast
2. Double membranous covering
3. Cell wall
4. Unit membrane
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 option which is true for them.
Statement-1: Polar molecules cannot pass through lipid bilayer of plasma membrane by self.
Statement-2: Polar molecules require carrier proteins to facilitate their transport across the membrane.
1. Both the statements are correct
2. Both the statements are incorrect
3. Only statement-1 is correct
4. Only statement-2 is correct
Read the statements and select the correct option.
(A) – Mesosome helps in cell wall formation in prokaryotes.
(B) – They are infolding of plasma membrane.
(1) Both A and B are correct
(2) Both A and B are incorrect
(3) Only A is correct
(4) Only B 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Reason(R): Anything less than a complete structure of a cell does not ensure independent living.
Choices for Assertions and reasons:
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.
Reason(R): The network of ER is scattered in the cytoplasm.
Choices for Assertions and reasons:
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.
Reason(R): The functions of endoplasmic reticulum (ER), golgi complex, lysosomes and Vacuoles are coordinated.
Choices for Assertions and reasons:
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.
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