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Q. No.Which one of the following acts as an inducer for lac operon?
1. Sucrose 2. Lactose 3. Glucose 4. Galactose
Subtopic: Gene Regulation: Lac Operon |
91%
Level 1: 80%+
NEET - 2023
Hints
With reference to Hershey and Chase experiments, select the correct statements:
Choose the most appropriate answer from the options given below:
| A: | Viruses grown in the presence of radioactive phosphorus contained radioactive DNA. |
| B: | Viruses grown on radioactive sulphur contained radioactive proteins. |
| C: | Viruses grown on radioactive phosphorus contained radioactive protein |
| D: | Viruses grown on radioactive sulphur contained radioactive DNA |
| E: | Viruses grown on radioactive protein contained radioactive DNA |
| 1. | (D) and (E) only | 2. | (A) and (B) only |
| 3. | (A) and (C) only | 4. | (B) and (D) only |
Subtopic: Search for Genetic Material |
84%
Level 1: 80%+
NEET - 2023
Hints
The salient features of genetic code are:
(A) The code is palindromic
(B) UGA act as initiator codon
(C) The code is unambiguous and specific
(D) The code is nearly universal
Choose the most appropriate answer from the options given below:
(A) The code is palindromic
(B) UGA act as initiator codon
(C) The code is unambiguous and specific
(D) The code is nearly universal
Choose the most appropriate answer from the options given below:
| 1. | (A) and (D) only | 2. | (B) and (C) only |
| 3. | (A) and (B) only | 4. | (C) and (D) only |
Subtopic: Genetic Code |
77%
Level 2: 60%+
NEET - 2023
Hints
How many nucleosomes are present in the nucleus of diploid eukaryotic cell which possess 6.6 x 109 bp?
1. 3.3 x 107
2. 6.6 x 106
3. 6.6 x 108
4. 3.3 x 109
1. 3.3 x 107
2. 6.6 x 106
3. 6.6 x 108
4. 3.3 x 109
Subtopic: DNA Packaging |
67%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
How many different amino acids would be there in the polypeptide translated from the translation unit of given stretch of mRNA?
1. Three
2. Two
3. Five
4. Four
1. Three
2. Two
3. Five
4. Four
Subtopic: Translation |
Level 4: Below 35%
Please attempt this question first.
Hints
Please attempt this question first.
During post transcriptional modification of hnRNA, the introns are removed by a complex substance. This complex has:
1. RNA and Protein
2. DNA and RNA
3. Ribozyme and protein
4. RNA polymerase and DNA polymerase
1. RNA and Protein
2. DNA and RNA
3. Ribozyme and protein
4. RNA polymerase and DNA polymerase
Subtopic: Transcription |
Level 3: 35%-60%
Please attempt this question first.
Hints
Given below are two statements:
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 Statement I and Statement II are incorrect
| Statement I: | RNA being unstable, it mutates at a faster rate |
| Statement II: | RNA can directly code for synthesis of proteins hence can easily express the characters. |
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 Statement I and Statement II are incorrect
Subtopic: DNA vs RNA as Genetic Material |
87%
Level 1: 80%+
NEET - 2023
Hints
Which scientist conducted an experiment with 32p and 35s labelled phages for demonstrating that DNA is the genetic material?
1. James D. Watson and F.H.C Crick
2. A.D. Hershey and M.J. Chase
3. F. Griffith
4. O.T. Avery, C.M. MacLeod and M. McCarty
1. James D. Watson and F.H.C Crick
2. A.D. Hershey and M.J. Chase
3. F. Griffith
4. O.T. Avery, C.M. MacLeod and M. McCarty
Subtopic: Search for Genetic Material |
84%
Level 1: 80%+
NEET - 2023
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false
| I: | The process of copying genetic information from one strand of the DNA into RNA is termed as transcription |
| II: | A transcription unit in DNA is defined primarily by the three regions in the DNA i.e. a promoter, the structural gene and a terminator. |
1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false
Subtopic: Transcription |
89%
Level 1: 80%+
NEET - 2023
Hints
Name the component that binds to the operator region of an operon and prevents RNA polymerase from transcribing the operon.
| 1. | Promotor | 2. | Regulator protein |
| 3. | Repressor protein | 4. | Inducer |
Subtopic: Gene Regulation: Lac Operon |
75%
Level 2: 60%+
NEET - 2023
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