Question

1. After treating some cells with a compound and examining the mRNA levels and the protein levels in the cell, what is a possible reason that mRNA levels and protein levels won't coincide?

A. The promoter is turned on more.

B. The mRNA transcripts degradation is being inhibited.

C. Protein levels equal mRNA levels.

D. None of the above

2.

Which of the following is different between prokaryotes and eukaryotes?

A.Prokaryotes are polycistronic and eukaryotes are monocistronic

B. Prokaryotes have more complex controls over gene expression than eukaryotes

C. mRNA only exists in eukaryotes.

D. DNA does exit in prokaryotes.

3. I (you, the test taker) contain an 80S ribosome?

A. True

B. False

Answer 1

For the above question

Question 1. The mRNA is transcribed from DNA(stable molecule) and it contains Uracile in place of Thymine. As Uracil is highly reactive in nature and also unstable so it can react with the compound that is treated with the cell as a result it disable the translation and the mRNA may degraded.

So the correct answer is - D) None of the above , so the protein and mRNA level will never coincide.

Question 2.

Option A) prokaryotes are polycistronic and eukaryotes are monocistronic. , it means in prokaryotes the single mRNA translated into more than one polypeptide for example in Lac Operon, but in eukaryotes single mRNA translated into only one polypeptide.

Question 3.

True, we are made up of eukaryotes and contains 80s ribosomes whereas prokaryotes contains 70s ribosomes