A gene is made up of three exons (numbered consecutively) with two introns

| March 14, 2016

Question
I need answers in 2 hours. I WILL ONLY PAY IF ALL ANSWERS ARE CORRECT!! I have erased incorrect answers to make it a bit easier.

Question 3

A gene is made up of three exons (numbered consecutively) with two introns (intron 1 between exons 1 and 2 and intron 2 between exons 2 and 3). What would happen if there were a mutation at the 3’ splice site of intron 1?

A.mRNA with only exons 2 and 3

B.mRNA with all three exons and both introns

C.mRNA with all three exons along with intron 1

Question 4

If every cell in the body gets the same DNA, how do the cells of an embryo make different structures and take on different roles? (Select all that apply.)

A. Different transcription factors are active in different cells.

B. Different transcription factors are encoded in the DNA.

C. Genes are spliced differently in different cells.

D. Translation is regulated so that different cells may make more of certain proteins.

E. Some cells lack ribosomes while others use them.

F. Cells delete a set of unused genes from their chromosomes.

Question 5

What would happen if there were a mutation in the operator of the trp operon?

B.the CAP protein couldn’t bind, therefore shutting off the genes

C.the trp operon would continuously express the genes

D.RNA polymerase could not recognize the promoter, so transcription would not occur

Question 7

What part of the ribosome is important in catalyzing peptide bonds?

A.the rRNA

C.the methyl guanosine cap

D.the E site

Question 10

Epigenetics refers to a special kind of hereditary mechanism. Epigenetic changes do not change the DNA nucleotide sequence, yet their effect on gene expression can last for several generations.
In one surprising study, it was found that the grandsons of men who suffered a famine were less likely to die of cardiovascular disease. The experience of famine made some cardio-protective change in the sperm of those grandfathers that was passed on.
What type of change was likely responsible?

B.phosphatase levels

C.transcription factor activity

D.histone acetylation or DNA methylation

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