DNA & Polypeptide Synthesis Multiple Choice Quiz 1

Forensic science can be used these days to identify suspects using the unique genetic code held in their DNA. Which of the following suspects would be the one wanted by police if the only evidence they had was the following strand of mRNA?

In fruit flies that are homozygous for the gene for vestigial wings have wings that are only tiny stumps if they are reared at room temperature (about 22oC). But if they are reared at temperatures as high as 32oC their wings will grow almost as long as normal wings.
This is an example of:

An example of the effect of the environment on the phenotype of an organism is:

Which set of chemicals is required to synthesise part of a polypeptide?

Haemophilia A is a blood clotting disorder that arises from a defect in the gene F8 which is carried on the X chromosome. The disorder affects the production of a glycoprotein that is one of many components needed to form the platelets which form blood clots when a bleed occurs. It is typically treated with infusions of FVIII product, an inactive single chain polypeptide of 2332 amino acids, which is manufactured using DNA technology on human endothelial cells.

Why is the inactive FVIII polypeptide chain used in the treatment of Haemophilia A?

The table shows the base triplets in mRNA for amino acids.
From the table, the amino acid Tryptophan (Trp) can be coded for by the base triplet UGG.

Which base triplet could code for the amino acid Arginine (Arg)?

Consider the structure and functional importance of proteins. Which one of the following statements about proteins is correct?

The part of a molecule referred to as an anticodon can be found in

Examine the following diagram:

Structure X represents

A molecule of transfer RNA could include the nucleotide sequence