Q. No.Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I
(Scientist)
Column II
(Contribution)
I. Hargobind Khorana
II. Norman Borlaug
III. Cohen and Boyer
IV. Ian Wilmut
1. Green revolution
2. First man-made gene
3. First cloned mammal
4. rDNA technology
Codes:
I
II
III
IV
1.
1
2
3
4
2.
2
1
4
3
3.
2
1
3
4
4.
1
2
4
3
Column I
(Scientist)
Column II
(Contribution)
I. Hargobind Khorana
II. Norman Borlaug
III. Cohen and Boyer
IV. Ian Wilmut
1. Green revolution
2. First man-made gene
3. First cloned mammal
4. rDNA technology
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Consider the following statements:
| I: | Inheritance of a character is affected by the promoter and regulatory sequences of a structural gene. |
| II: | The split-gene arrangement represents an ancient feature of the genome. |
| III: | The process of splicing represents the dominance of the RNA world. |
Which of the above statements are true?
| 1. | I and II only |
| 2. | I and III only |
| 3. | II and III only |
| 4. | I, II, and III |
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Consider the following statements:
| I: | The unequivocal proof of DNA being the genetic material was given by Hershey and Chase. |
| II: | Meselson and Stahl proposed that DNA replication is semi-conservative. |
| III: | Beadle and Tatum proposed the one -gene - one - enzyme hypothesis. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
| I: | The VNTRs belong to a class of satellite DNA called as mini-satellite. |
| II: | Southern blotting is the transfer of DNA fragments to a filter cellulose membrane. |
| III: | VNTRs are used in DNA fingerprinting as they do not show any variations and are not inherited. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
| I: | The cellular factory responsible for synthesizing proteins is the ribosome. |
| II: | The ribosome also acts as a catalyst for the formation of a peptide bond. |
| III: | The UTRs (untranslated regions) in an mRNA are not required for translation. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Study the results of the Meselson and Stahl experiment. What theoretically possible mode of DNA replication can be excluded after one round of replication?
| 1. | Conservative | 2. | Semiconservative |
| 3. | Disruptive | 4. | Both 1 and 3 |
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Which histone is represented by the letter X in the given diagram?
| 1. | H 1 | 2. | H 2 A |
| 3. | H 2 B | 3. | H 3 |
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Given below in Column I are the criteria for a molecule that can act as a genetic material and the corresponding inferences drawn are given in Column II. Identify the criteria that is not correctly matched to the inference drawn:
|
|
Criteria |
Inference drawn |
|
1. |
It should be able to replicate |
Protein cannot be the genetic material |
|
2. |
It should be stable structurally and chemically |
DNA is a better genetic material than RNA |
|
3. |
It should provide the scope for slow changes |
RNA evolves faster than DNA |
|
4. |
It should be able to express in the form of Mendelian characters |
The protein synthesizing machinery has evolved around DNA |
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Heat-killed S form Streptococcus extract treated with proteases is mixed with live R form Streptococcus cells and injected into living mice. What is most likely to happen?
| 1. | The mice would live. |
| 2. | The mice would die. |
| 3. | The mice's blood would have dead R cells. |
| 4. | A new strain of Streptococcus will be present in mice. |
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The addition of deoxyribonucleotides by DNA polymerase during DNA synthesis is an endergonic process. The source of energy used is:
| 1. | ATP |
| 2. | Energy from photons of light |
| 3. | Entropy created from protein digestion |
| 4. | The nucleotides themselves |
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