Question

Identify the types of point mutations depicted. glycine glycine missense mutation nonsense mutation silent mutation lysine stop missense mutation nonsense mutation silent mutation

Answer 1

Glycine glycine - Silent mutation.                                                                             Lysine stop; - Nonsense mutations.                                                                      Silent mutations are caused by a point mutation and have no effect of the function because they code for the same amino acid.                                                   Missense mutations are caused by a point mutation and result in a different amino acid to be placed in the protein. Nonsense mutations is caused by a point mutation and cause a stop where there should not be one. The Frame shift mutations on the other hand are caused by insertion or deletion of a nucleotide causing a reading frame to shift and the protein to be too long or too short.                                                                        

Answer 2

Answer to question 1:

The correct answer is option D which is silent mutation.

The glycine-glycine mutation: Silent mutation.

Explanation:

• Mutations are the change in the nucleotide sequence of genetic material due to substitution, deletion or insertion of the nucleotides leading to changed protein.
• There are many types of mutations.
• If a mutation causes no effect on the protein produced, it is known as the silent mutation. It is usually due to substitution of one nucleotide with the same type of nucleotide as in glycine glycine mutation.

Answer to question 2:

The correct answer is option C which is non sense mutation.

Lysine stop mutations: Nonsense mutations.

Explanation:

Mutations are the change in the nucleotide sequence of genetic material due to substitution, deletion or insertion of the nucleotides leading to changed protein.

There are many types of mutations which leads to the early and delayed termination of the transcription of a gene.

If a mutation of a single nucleotide causes termination of transcription, it is known as nonsense mutation.

As in case of lysine stop.