Q. No.Which hormone is used to induce immediate stomatal closure in leaves ?
1.
Cytokinin
2.
Gibberellin
3.
Abscisic Acid
4.
Auxin
Given below are two statements:
| Statement I: | Cellulose is a polymeric polysaccharide |
| Statement II: | The building blocks of cellulose are glucose molecules |
In the light of the above statements , choose the correct answer from the options given below:
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statements I and Statements II |
High dose of UV-B causes inflammation of cornea and is called as:
| 1. | UV -blindness | 2. | Colour-blindness |
| 3. | Evening- blindness | 4. | Snow- blindness |
Which of the following come under the "Evil Quarter"?
| (a) Habitat loss and fragmentation | |
| (b) Over-exploitation | (c) Alien species invasion |
| (d) Mortality | (e) Competition |
Choose the correct answer from the options given below:
| 1. | (a), (c) and (d) | 2. | (b), (c) and (d) |
| 3. | (a), (b) and (c) | 4. | (a), (b) and (d) |
Which one of the following experiments of Frederick Griffith resulted in the discovery of bacterial transformation?
| 1. | S-stain(heat-killed) → injected in to Mice → Mice lived |
| 2. | S-strain (heat killed) + R-strain(live) →injected in to Mice → Mice died |
| 3. | S-stain → injected in to Mice → Mice died |
| 4. | R-strain → injected in to Mice → Mice lived |
DNA replication is semi-conservative in nature was experimentally proved in eukaryotes by:
| 1. | Hershey and Chase | 2. | Macleod and McCarty |
| 3. | Meselson and Stahl | 4. | Talyor and his colleagues |
Which one of the following is not a criterion of genetic material?
| 1. | Should not provide the scope for changes for evolution |
| 2. | Should be able to express itself in the form of Mendelian character |
| 3. | Should be able to generate its replica |
| 4. | Should be stable chemically and structurally |
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | A father will never pass the gene for haemophilia to his sons. |
| Reason (R): | Haemophilia is sex-linked (X-linked) recessive traits. |
In the light of the above statements, choose the correct answer from the options given below.
| 1. | (A) is True but (R) is False. |
| 2. | (A) is False but (R) is True. |
| 3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
The living differentiated cells, that lost the capacity to divide anymore, can regain the capacity of division under certain conditions. This phenomenon is termed as
| 1. | Redifferentiation | 2. | Maturation |
| 3. | Differentiation | 4. | Dedifferentiation |
Select the correct statements with respect to pleiotropism
| (a) | A gene is said to be pleiotropy if it affects more than one trait |
| (b) | Phenylketonuria is an example of pleiotropy |
| (c) | A condition where one gene has several alleles is referred to as pleiotropism |
| (d) | A trait is said to be pleiotropic if several genes control it |
Choose the correct answer from the options given below:
| 1. | (a) and (b) only | 2. | (a) and (d) only |
| 3. | (a), (b) and (c) only | 4. | (b) ,(c) and (d) only |
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