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Q. No.The salient features of genetic code are
A. The codon is triplet, 61 codons for amino acids & 3 codons do not code for any amino acid, they function as stop codon
B. The codon is read in mRNA in contiguous fashion, no punctuations
C. UAA, UAG, UGA are stop terminator codons
D. Some codes are universal
E. AUG has dual function, it codes for phenylalanine (Phe) and it also acts as terminate the process
Choose the correct answer from the options given below:
1. A, B, D only
2. A, B, C only
3. A, B, D, E oly
4. A & E only
Subtopic: Genetic Code |
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Reverse transcriptase is an enzyme encoded in the genetic material of retroviruses that catalyzes the transcription of retroviral genetic material. The enzymatic activity of reverse transcriptase is
1. DNA-dependent RNA polymerase
2. DNA-dependent DNA polymerase
3. RNA-dependent DNA polymerase
4. RNA-dependent RNA polymerase
1. DNA-dependent RNA polymerase
2. DNA-dependent DNA polymerase
3. RNA-dependent DNA polymerase
4. RNA-dependent RNA polymerase
Subtopic: The DNA |
63%
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In the Lac operon
A. i gene codes for the repressor
B. y gene codes for transacetylase
C. z gene codes for beta-galactosidase
D. Allolactose activates repressor
E. Repressor protein prevents RNA polymerase action by binding to promoter
Choose the correct answer from the options given below:
1. B and C only
2. A and C only
3. B, C and E only
4. A, C and E only
A. i gene codes for the repressor
B. y gene codes for transacetylase
C. z gene codes for beta-galactosidase
D. Allolactose activates repressor
E. Repressor protein prevents RNA polymerase action by binding to promoter
Choose the correct answer from the options given below:
1. B and C only
2. A and C only
3. B, C and E only
4. A, C and E only
Subtopic: Gene Regulation: Lac Operon |
From NCERT
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Match List I with List II
Choose the correct answer from the options given below:
1. A - (I); B - (II); C - (III); D - (IV)
2. A - (II); B - (III); C - (IV); D - (I)
3. A - (III); B - (IV); C - (II); D - (I)
4. A - (II); B - (III); C - (I); D - (IV)
| List I | List II |
| A. Ribosomal-RNA synthesis | I. Mitochondrial matrix |
| B. Protein synthesis | II. Nucleolus |
| C. Transfer-RNA synthesis | III. Ribosomes |
| D. mtDNA | IV. Nucleus |
1. A - (I); B - (II); C - (III); D - (IV)
2. A - (II); B - (III); C - (IV); D - (I)
3. A - (III); B - (IV); C - (II); D - (I)
4. A - (II); B - (III); C - (I); D - (IV)
Subtopic: Transcription |
65%
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Match List I with List II
Choose the correct answer from the options given below:
1. A - (II); B - (III); C - (I); D - (IV)
2. A - (III); B - (IV); C - (I); D - (II)
3. A - (IV); B - (II); C - (III); D - (I)
4. A - (II); B - (I); C - (IV); D - (III)
| List I | List II |
| A. Matthew Meselson and Franklin Stahl | I. DNA is the genetic material |
| B. Alfred Hershey and Martha Chase | II. Semi-Conservative replication of DNA |
| C. Frederick Griffith | III. "Transforming principle" in DNA |
| D. Avery, MacLeod and McCarty | IV. Discovery of pneumococcal transformation |
1. A - (II); B - (III); C - (I); D - (IV)
2. A - (III); B - (IV); C - (I); D - (II)
3. A - (IV); B - (II); C - (III); D - (I)
4. A - (II); B - (I); C - (IV); D - (III)
Subtopic: DNA Replication | Search for Genetic Material |
67%
From NCERT
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Subtopic: Genetic Code |
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Subtopic: DNA Replication | Transcription |
90%
From NCERT
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If E. coli is growth in the absence of lactose, it will stop the synthesis of
1. Ribonuclease
2. \(\beta\)-lactamase
3. \(\beta\)-galactosidase
4. Pyruvate kinase
1. Ribonuclease
2. \(\beta\)-lactamase
3. \(\beta\)-galactosidase
4. Pyruvate kinase
Subtopic: Gene Regulation: Lac Operon |
90%
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Match List I with List II
Choose the correct answer from the options given below:
1. A-IV, B-I, C-III, D-I
2. A-III, B-II, C-IV, D-I
3. A-III, B-II, C-I, D-IV
4. A-III, B-I, C-IV, D-II
| List I | List II |
| A. Fredrich Miescher | I. Used X-ray analysis to investigate DNA structure |
| B. Rosalind Franklin | II. Provided experiment evidence of semiconservative DNA replication |
| C. James Watson | III. Discovered DNA |
| D. Mathew Meselson | IV. Elucidated 3-dimensional double helix DNA structure |
1. A-IV, B-I, C-III, D-I
2. A-III, B-II, C-IV, D-I
3. A-III, B-II, C-I, D-IV
4. A-III, B-I, C-IV, D-II
Subtopic: Genetic Code |
From NCERT
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E.coli growing in a medium containing radioactive thymidine was allowed to grow in normal medium (without radioactive thymidine) for two generations. What percentage of bacteria will have radioactive DNA strand?
1. 100%
2. 50%
3. 25%
4. 12.5%
1. 100%
2. 50%
3. 25%
4. 12.5%
Subtopic: DNA Replication |
69%
From NCERT
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