Can anyone help me with these 5 Qs in Bio? Including a clear explanation. Thanks

Question

Can anyone help me with these 5 Qs in Bio? Including a clear explanation. Thanks?

1. A man acquires a deletion mutation in a gene in his germ cells from a DNA replication
error. A woman acquires nonsense mutations in some of her skin cells from being out in the
sun too long. If these two individuals mate, which of the mutations might be passed onto
their children?
A. Neither mutation has a chance to be passed on
B. The man’s mutation has a chance to be passed on
C. The woman’s mutation has a chance to be passed on
D. Both mutations have a chance to be passed on


2. The BLM protein plays a role in unwinding DNA during S phase. Which protein is the BLM
protein most similar to?
A. Topoisomerase D. ATP synthase
B. Helicase E. Kinesin
C. DNA polymerase

3. To detect whether or not a cell has a specific region of a gene, researchers add
radioactively-labeled DNA molecules which can bind to their complementary DNA sequences.
To detect a mutant version of the BLM gene, researchers added the radioactive DNA
molecule 5’ – GCTAGCTAAGCCCA – 3’ to cells. What DNA sequence were the researchers
trying to detect?

A. 5’ – GCTAGCTAAGCCCA – 3’
B. 3’ – GCTAGCTAAGCCCA – 5’
C. 5’ – CGATCGATTCGGGT – 3’
D. 3’ – CGATCGATTCGGGT – 5’

4. The R403Q mutation results in a mutation from an arginine amino acid (positively charged)
to a glutamine amino acid (no charge, hydrophilic) due to two nucleotides being changed in
the myosin gene. What type of mutation is this?
A. A silent mutation C. A nonsense mutation
B. A missense mutation D. A frameshift mutation

5. The template DNA for the beginning of the myosin gene is
3’ – GATACATGAGGCGATACG – 5’. What mRNA transcript will be transcribed from this DNA
template and how many amino acids does it information to code for?
A. 5’ – CUAUGUACUCCGCUAUGC – 3’ --- five amino acids
B. 5’ – CUAUGUACUCCGCUAUGC – 3’ --- six amino acids
C. 5’ – CTUTGTUCTCCGCTUUGC – 3’ --- five amino acids
D. 5’ – CTUTGTUCTCCGCTUUGC – 3’ --- six amino acids

I'm guessing D-B-D-B-B but I'm not sure.

Explanation / Answer

Q1).
B. The man’s mutation has a chance to be passed on

Q2).
B. Helicase

Q3).
D. 3’ – CGATCGATTCGGGT – 5’

Q4).

B. A missense mutation

Q5).

B. 5’ – CUAUGUACUCCGCUAUGC – 3’ --- six amino acids

.

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