Which of the following steps is not involved in the process of transcription?
The DNA double helix separates into single strands
DNA polymerase binds to one of the single strands and moves along the gene
Free RNA nucleotides are joined together by covalent bonds
The RNA molecule detaches from the DNA template strand at the end of the gene
The following diagram shows the process of translation.
Which row of the following table correctly identifies the labelled components?
| P | Q | R | S | |
| A. | anticodon | codon | ribosome | mRNA |
| B. | codon | anticodon | ribosome | tRNA |
| C. | anticodon | codon | ribosome | tRNA |
| D. | codon | anticodon | mRNA | ribosome |
In a genetic engineering experiment, a piece of double-stranded DNA containing 18 000 nucleotides coding for a specific polypeptide is transcribed and translated.
What is the total number of amino acids in this polypeptide?
3 000
6 000
9 000
18 000
A section of a DNA molecule contains the following base sequences:
ATA CCT GCA
Which of the following would represent the base sequences of the codons on the mRNA molecule after transcription?
ATA CCT GCA
AUA CCU GCA
TAT GGA CGT
UAU GGA CGU
Which one of the following would not be an advantage of using bacteria to produce human insulin?
Some bacteria can survive at very high temperatures, which will make the insulin less likely to denature
The insulin produced by the genetically modified bacteria is identical to human insulin
Bacteria uses the same genetic code as humans which makes gene transfer possible between the species
Bacteria can produce large quantities of insulin in a relatively short amount of time
