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Q. No.The backbone of a polynucleotide chain is made of:
1.
Sugar and nitrogenous bases
2.
Phosphate and nitrogenous bases
3.
Sugar and phosphate
4.
Sugar, phosphate, and nitrogenous bases
Subtopic: The DNA | DNA Double Helix |
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Which of the following acts as a ribozyme for peptide bond formation in bacteria?
| 1. | 5s rRNA | 2. | 23s rRNA |
| 3. | 16s rRNA | 4. | 5.1s rRNA |
Subtopic: Translation |
89%
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In actual structure, tRNA is a compact molecule that looks like a/an:
| 1. | Cloverleaf | 2. | Railroad |
| 3. | Inverted L | 4. | Alpha helix |
Subtopic: Translation |
72%
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During DNA packaging in eukaryotic cells, Non-Histone Chromosomal proteins:
| 1. | Are not required |
| 2. | Are required from the beginning to the end of the packaging |
| 3. | Are required only for earlier stages of packaging |
| 4. | Are required for a higher level of packaging |
Subtopic: DNA Packaging |
81%
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Histones are:
| 1. | Positively charged and basic amino acids |
| 2. | Negatively charged and basic proteins |
| 3. | Positively charged and acidic proteins |
| 4. | Not found in bacteria |
Subtopic: DNA Packaging |
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Reverse transcriptase is a:
| 1. | DNA-dependent RNA polymerase |
| 2. | RNA-dependent DNA polymerase |
| 3. | RNA-dependent RNA polymerase |
| 4. | DNA-dependent DNA polymerase |
Subtopic: DNA Replication |
77%
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The density gradient in Meselson and Stahl's experiment was of:
| 1. | NH4Cl | 2. | CsCl |
| 3. | KCl | 4. | BaCl2 |
Subtopic: DNA Replication |
83%
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Who suggested that the genetic code should be made of three nucleotides?
| 1. | Gamow | 2. | Severo Ochoa |
| 3. | Hargobind Khorana | 4. | Marshall Nirenberg |
Subtopic: Genetic Code: I | Genetic Code: II | Genetic Code: III |
72%
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Subtopic: Transcription: I |
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Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?
| 1. | 5’ – UAC – 3’ | 2. | 5’ – TAC – 3’ |
| 3. | 3’ – UAC – 5’ | 4. | 3’ – TAC – 5’ |
Subtopic: Translation |
72%
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