Unequivocal proof that DNA is the genetic material was first proposed by:
1. Wilkins and Franklin
2. Frederick Griffith
3. Alfred Hershey and Martha Chase
4. Avery, Macleod and McCarthy
1. Wilkins and Franklin
2. Frederick Griffith
3. Alfred Hershey and Martha Chase
4. Avery, Macleod and McCarthy
Subtopic: Β Search for Genetic Material |
Β 82%
Level 1: 80%+
NEET - 2023
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Cellulose does not form blue colour with iodine because
| 1. | It breaks down when iodine reacts with it. |
| 2. | It is a disaccharide. |
| 3. | It is a helical molecule. |
| 4. | It does not contain complex helices and hence cannot hold iodine molecules. |
Subtopic: Β Carbohydrates: Cellulose, Chitin, Inulin & Agar |
Β 88%
Level 1: 80%+
NEET - 2023
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The reaction centre in PS II has an absorption maxima at:
| 1. | 780 nm | 2. | 680 nm |
| 3. | 700 nm | 4. | 660 nm |
Subtopic: Β Light Reactions |
Β 90%
Level 1: 80%+
NEET - 2023
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Upon exposure to UV radiation, DNA stained with ethidium bromide will show:
| 1. | Bright orange colour | 2. | Bright red colour |
| 3. | Bright Blue colour | 4. | Bright yellow colour |
Subtopic: Β Separation and Isolation of DNA fragments |
Β 93%
Level 1: 80%+
NEET - 2023
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The phenomenon of pleiotropism refers to:
| 1. | more than two genes affecting a single character. |
| 2. | presence of several alleles of a single gene controlling a single crossover. |
| 3. | presence of two alleles, each of the two genes controlling a single trait. |
| 4. | a single gene affecting multiple phenotypic expressions. |
Subtopic: Β Polygenic Inheritance & Pleiotropy |
Β 81%
Level 1: 80%+
NEET - 2023
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The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year :
| 1. | 2002 | 2. | 1985 |
| 3. | 1992 | 4. | 1986 |
Subtopic: Β Ex Situ Conservation of Biodiversity |
Β 82%
Level 1: 80%+
NEET - 2023
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During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out:
| 1. | Polysaccharides | 2. | RNA |
| 3. | DNA | 4. | Histones |
Subtopic: Β General Design of an rDNA experiment |
Β 90%
Level 1: 80%+
NEET - 2023
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Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by:
| 1. | Henking | 2. | Thomas Hunt Morgan |
| 3. | Sutton and Boveri | 4. | Alfred Sturtevant |
Subtopic: Β Understanding Linkage |Β Linkage Types |Β Recombination & Gene Mapping |
Β 73%
Level 2: 60%+
NEET - 2023
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Among eukaryotes, replication of DNA takes place in:
| 1. | G2 Phase |
| 2. | M phase |
| 3. | S phase |
| 4. | G1 phase |
Subtopic: Β Intro to Cell Cycle & Interphase |
Β 92%
Level 1: 80%+
NEET - 2023
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What is the function of the ears in the corn cob?
| 1. | To protect seeds | 2. | To attract insects |
| 3. | To trap pollen grains | 4. | To disperse pollen grains |
Subtopic: Β Pollination & Outbreeding Devices |
Β 79%
Level 2: 60%+
NEET - 2023
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