Quick Biochemistry - Nucleic Acids (Section 13)
1
Within the 'lac operon' model, which element is a protein?
2
What does the term 'degeneracy of the genetic code' refer to?
उत्तर(B)
Codons consisting of only two bases
3
What is the typical role of restriction endonucleases?
उत्तर(D)
Protect bacteria from foreign DNA
4
How does prokaryotic mRNA typically differ from eukaryotic mRNA?
उत्तर(A)
Having 7-methyl guanosine triphosphate at the 5' end
5
Which co-factor is essential for DNA ligase in E. coli?
6
Which gene is transcribed during repression?
7
An mRNA molecule is a complementary copy of which DNA strand?
8
What factor signals the termination of RNA molecule synthesis?
9
Which antibiotic hinders the binding of prokaryotic DNA-dependent RNA polymerase to gene promoter sites?
10
In E. coli, which amino acid starts protein synthesis?
11
What process does the mushroom toxin Amanitin disrupt?
12
During protein synthesis, how many high-energy phosphate bonds are needed for amino acid activation?
13
What molecule is produced as a result of the translation process?
14
Which of the following is NOT involved in peptide chain elongation?
15
What is the function of the 'rho' (ρ) factor?
उत्तर(C)
In termination of transcription
16
What energy-carrying molecule does ligase require during the synthesis of c-DNA?
17
Which molecule attaches to specific nucleotide sequences far from the starting point?
18
Which sequence is complementary to TGGCAGCCT?
19
In what location are ribosomes, similar to those found in bacteria, located?
20
How do DNA and RNA synthesis NOT share similar mechanisms?
21
Which process does NOT involve template-directed DNA synthesis?
उत्तर(C)
Growth of RNA tumor viruses
