Question

1, If alternative splicing was not available, what impact would this have?

Individuals would need more DNA to code for proteins

Individuals would need less DNA to code for proteins

Individuals would not be able to make different proteins from the same sequence of DNA

Both A and C

None of the above

2, An individual has a mutation that adds one base to the sequence of DNA. What type of mutation is this most likely to cause?

Silent

Mis-Sense

Non-Sense

Homologous

Frame Shift

3, If the gene that codes for ribosomal RNA is mutated and the E site of the RNA is misshapen, what will happen?

The mRNA will not bind to the tRNA

New amino acids will not be added to the growing polypeptide chain

The mRNA and polypeptide chain will not be able to leave the ribosome

The ribosome will bind irreversibly to the endoplasmic reticulum

4, If a mutation occurred that increased the number of extrons in a sequence of DNA, what impact would this have on the protein formed from the gene?

It would change the shape

It would change the function

It would have no effect

Both A and B

5, An individual has a mutation that dramatically shortens the length of the polyA tail in their RNA. What impact will this have?

They will have to transcribe less often, as their RNA will stay in the cytosol

They will have to transcribe more often, as their RNA will not persist in the cytosol NOT B per Chegg student feedback

They will decrease the rate of translation, as the ribosomes will stay together longer

There will be no impact on transcription or translation

6, The portion of a tRNA molecule that makes contact with codons in mRNA is called the

Anticodon

RNA Polymerase

Codon

Termination factor

Answer 1

QUESTION-1

ANSWER

If alternative splicing was not available, impact this would have

A. Individuals would need more DNA to code for proteins.

EXPLANATION

Alternative splicing produces a large diversity of gene arrangement.

It increases proteomic diversity.

Alternative splicing arranges exons that regulate gene expression that results in a single gene coding for multiple proteins.

Introns get removed in order to produce a functional mRNA.

QUESTION-2

ANSWER

An individual has a mutation that adds one base to the sequence of DNA.

Type of mutation is this most likely to cause-

E. Frame Shift

EXPLANATION

Frameshift mutation occurs when nucleotide bases get added to or deleted from DNA.

Deletions and mutations are not multiples of three nucleotides.

It changes the functionality of the polypeptide.

It has the most deleterious effect on the genome.

QUESTION-3

ANSWER

If the gene that codes for ribosomal RNA is mutated and the E site of the RNA is misshapen,

C. The mRNA and polypeptide chain will not be able to leave the ribosome

EXPLANATION

Translation has three steps

• Initiation
• Elongation
• Termination

AUG is the start codon for the translation.

During translation, the ribosome has three sites A site, P site, and E site.

A site accepts the aminoacyl tRNA.

P site or peptidyl site which binds to the tRNA holding the growing polypeptide chain of amino acids.

The E site which is the exit site, Growing polypeptide leaves from this site.

GOOD LUCK.