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Q. No.| Statement I: | The codon AUG' codes for methionine and phenylalanine. |
| Statement II: | AAA' and 'AAG are both codons that code for the amino acid lysine. |
In 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. |
Subtopic: Genetic Code |
59%
Level 3: 35%-60%
NEET - 2021
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Identify the correctly matched pair:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I. | Binding of nitrogenous bases to a pentose sugar to form a nucleoside | N-glycosidic bond at C1 of the pentose sugar |
| II. | Binding of phosphate to a nucleoside to form a nucleotide | Ester bond at C5 of the pentose sugar |
| III. | Joining of two nucleotides to form a dinucleotide | 5’-3’ phosphodiester bond |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: DNA Double Helix |
Level 4: Below 35%
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The molecule shown in the given figure:
| I: | serve as substrate for DNA replication |
| II: | provide energy for polymerisation reaction |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: DNA Replication: I |
78%
Level 2: 60%+
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In the given diagram, identify A, B, C and D:
| A | B | C | D | |
| 1. | Terminator | Promoter | Template Strand | Coding Strand |
| 2. | Promoter | Terminator | Template Strand | Coding Strand |
| 3. | Promoter | Terminator | Coding Strand | Template Strand |
| 4. | Terminator | Promoter | Coding Strand | Template Strand |
Subtopic: Transcription: I |
78%
Level 2: 60%+
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| Assertion (A): | VNTRs are the basis of DNA fingerprinting by RFLP |
| Reason (R): | VNTRs are polymorphic and are inherited |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |
| 3. | (A) is True but (R) is false |
| 4. | Both (A) and (R) are False |
Subtopic: DNA Fingerprinting |
74%
Level 2: 60%+
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Number of genes on chromosome 1 | P. | 2968 |
| B. | Number of genes on Y chromosome | Q. | Less than 2 |
| C. | Percent of genome that codes for proteins | R. | Over 50 |
| D. | Percent of discovered genes without known functions | S. | 231 |
Codes:
| A | B | C | D | |
| 1. | P | S | Q | R |
| 2. | S | P | Q | R |
| 3. | P | S | R | Q |
| 4. | S | P | R | Q |
Subtopic: Human Genome Project |
83%
Level 1: 80%+
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Identify the incorrectly matched pair:
| 1. | Taylor | Radioactive thymidine |
| 2. | Meselson and Stahl | 15N |
| 3. | Hershey and Chase | 32P and 35S |
| 4. | Griffith | 14C |
Subtopic: Search for Genetic Material |
89%
Level 1: 80%+
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Identify the incorrect match:
| mRNA codon | Amino acid | |
| 1. | AUG | Methionine |
| 2. | GGG | Glycine |
| 3. | UGA | Tryptophan |
| 4. | UAG | None; it is a stop codon |
Subtopic: Genetic Code |
82%
Level 1: 80%+
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Consider the given statements:
| I: | Griffith discovered the process of bacterial transformation. |
| II: | Hershey and Chase unequivocally proved that DNA is the genetic material. |
| III: | Meselson and Stahl showed that DNA replicated semi-conservatively. |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: DNA Replication | Search for Genetic Material |
85%
Level 1: 80%+
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Read the following statements and choose the set of correct statements:
Choose the correct answer from the options given below:
1. (a), (c), (e) only
2. (b), (d), (e) only
3. (a), (c), (d) only
4. (b), (e) only
| (a) | Euchromatin is loosely packed chromatin. |
| (b) | Heterochromatin is transcriptionally active. |
| (c) | Histone octomer is wrapped by negatively charged DNA in nucleosome. |
| (d) | Histones are rich in lysine and arginine. |
| (e) | A typical nucleosome contains 400 bp of DNA helix. |
1. (a), (c), (e) only
2. (b), (d), (e) only
3. (a), (c), (d) only
4. (b), (e) only
Subtopic: DNA Double Helix | DNA Packaging |
90%
Level 1: 80%+
NEET - 2022
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