Q. No.The Griffith’s experiment involving Streptococcus pneumoniae demonstrated the principle of:
1. Transformation
2. Conjugation
3. Transduction
4. Transcription
1. Transformation
2. Conjugation
3. Transduction
4. Transcription
Subtopic: Search for Genetic Material |
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What was the main conclusion of the Avery, MacLeod, and McCarty experiment?
| 1. | Proteins are responsible for genetic transformation. |
| 2. | DNA is the hereditary material responsible for transformation. |
| 3. | RNA is the hereditary material. |
| 4. | Carbohydrates cause the transformation in bacteria. |
Subtopic: Search for Genetic Material |
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In Avery, MacLeod and McCarty experiment, the transformation was affected by the use of:
| 1. | Protease | 2. | DNase |
| 3. | RNase | 4. | Lipase |
Subtopic: Search for Genetic Material |
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A molecule that can act as a genetic material must fulfill all the following criteria except:
| 1. | It should be able to generate its replica. |
| 2. | It should chemically and structurally be stable. |
| 3. | It should be able to express itself in the form of Medelian characters. |
| 4. | It should provide scope for rapid changes required for evolution. |
Subtopic: Search for Genetic Material |
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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 |
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NEET - 2022
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The unequivocal proof that DNA is the genetic material was given by
| 1. | Griffith | 2. | Avery |
| 3. | Hershey and Chase | 4. | MacLeod |
Subtopic: Search for Genetic Material: II | Search for Genetic Material |
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In Hershey and Chase experiment, the DNA of the phage was labelled with
| 1. | 35S | 2. | 32P |
| 3. | 18O | 4. | 14C |
Subtopic: Search for Genetic Material |
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Which scientists first gave experimental evidence that DNA is the genetic material?
| 1. | Avery, MacLeod , and McCarty who repeated the transformation experiments of Griffith, and chemically characterized the transforming principle. |
| 2. | Garrod, who postulated that Alcaptonuria, or black urine disease, was due to a defective enzyme. |
| 3. | Beadle and Tatum, who used a mutational and biochemical analysis of the bread mold Neurospora to extablish a direct link between genes and enzymes. |
| 4. | Meselson and Stahl who showed that DNA is replicated semiconservatively. |
Subtopic: Search for Genetic Material: II | Search for Genetic Material |
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Which of the following inspired Avery and his colleagues to perform the experiments demonstrating that the transforming principle in bacteria is DNA?
| 1. | the fact that A is equal to T, and G is equal to C |
| 2. | Watson and Crick’s model of DNA structure |
| 3. | Meselson and Stahl’s studies on DNA replication in E. coli |
| 4. | Griffith’s experiments on smooth and rough strains of pneumococci |
Subtopic: Search for Genetic Material |
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In the Avery, Macleod, and McCarty experiment, the use of which of the following will affect bacterial transformation?
1. trypsin
2. chymotrypsin
3. ribonuclease
4. deoxyribonuclease
1. trypsin
2. chymotrypsin
3. ribonuclease
4. deoxyribonuclease
Subtopic: Search for Genetic Material |
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