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 |
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | The growth of a multicellular organism is due to mitosis. |
| Reason (R): | Mitosis is also called as equational division and it offers genetic stability. |
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 and (R) is not the correct explanation of (A). |
Select the correct statements related to the activity of cork cambium
| 1. | The outer cells differentiate into phelloderm |
| 2. | The cork differentiated from cork cambium, is impervious to water due to deposition of tannins and resins |
| 3. | Cuts the cells only on the outer side |
| 4. | Cuts the cells on inner as well as outer side |
Which of the following are not correct regarding decomposition of wastes ?
| (a) | Low temperature inhibits decomposition |
| (b) | Warm and moist environment favours the process |
| (c) | The process is anaerobic |
| (d) | It is slower if detritus is rich in proteins and carbohydrates |
| (e) | Detritus is degraded into simpler inorganic substance by fungal and bacterial enzymes |
Choose the correct answer from the options given below:
| 1. | (b) and (c) only | 2. | (c), (a) and (d) only |
| 3. | (c) and (d) only | 4. | (c), (d) and (e) only |
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | In rDNA technology, non-recombinants transformed bacteria grow on the medium containing ampicillin as well as the medium containing tetracycline. |
| Reason (R): | Recombinant plasmids contain the foreign gene of interest. |
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). |
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Semiconservative replication was experimentally proved by Mathew Meselson and Franklin Stahl (1958). |
| Reason (R): | Meselson and Stahl used radioactive isotope \(^{15}N\) and equilibrium density gradient centrifugation technique. |
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 construction of the first recombinant DNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native plasmid of which of the following organism?
1. Escherichia coli
2. Bacillus thuringiensis
3. Salmonella typhimurium
4. Agrobacterium tumefaciens
Which of the following is correct statement ?
| 1. | Actin and regulatory proteins are located in thin filament. |
| 2. | Z-lines anchor myosin (thick) filament to the ends of the sarcomere. |
| 3. | Sarcoplasmic reticulum stores acetylcholine. |
| 4. | Myosin cross bridges contain calcium binding sites. |
In Drosophila, the genes for color of body and color of eyes are situated on _______.
| 1. | both the sex chromosomes | 2. | autosomes |
| 3. | Y-chromosome | 4. | X-chromosome |
In a cell, the separation of DNA strands is brought about by the enzyme DNA helicase, whereas in PCR, the separation of DNA strands is due to :
| 1. | High temperature | 2. | Two sets of Primers |
| 3. | Taq DNA polymerase | 4. | Deoxynucleotides |
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