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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 |
82%
Level 1: 80%+
Hints
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
1. 5s rRNA
2. 23s rRNA
3. 16s rRNA
4. 5.1s rRNA
Subtopic: Translation |
87%
Level 1: 80%+
Hints
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 |
73%
Level 2: 60%+
Hints
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 |
83%
Level 1: 80%+
Hints
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 |
Level 4: Below 35%
Hints
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%
Level 2: 60%+
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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 |
85%
Level 1: 80%+
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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 |
75%
Level 2: 60%+
Hints
Subtopic: Transcription: I |
70%
Level 2: 60%+
Hints
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 |
74%
Level 2: 60%+
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