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Biochem Exam 3 2024/2025 Questions With Completed & Verified Solutions.
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Biochem Exam 3 2024/2025 Questions With Completed & Verified Solutions.
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Biochem Exam 3In addition to the insulin receptor being able to signal to mTOR and upregulate things like lipid
biosynthesis, ribosome biogenesis, and translation, another biosensor in the cell can sense
energy levels and nutrient availability. This biosensor's name is...? - ANS AMPK
Which of the following is not a second messenger molecule? - ANS steroids
The type of hormone receptors that are found within the cell are called? - ANS nuclear receptors
Below is a diagram that can best explain which type of cellular signaling? - ANS G
protein-coupled receptor signaling
Nucleosomes are composed of all the following except ____ - ANS H5
DNA molecules are copied or replicated by a ____ mechanism - ANS semiconservative
Point mutations that occur in a population to any extent are referred to as ____ - ANS single
nucleotide polymorphisms
Which of the following statements is not true of mRNA? - ANS prokaryotic mRNAs are capped
with 7-methylguanosine
Which of the following chemicals can be used to block all de novo (new) protein synthesis in a
cell? - ANS cyclohexamide
When v-snares and t-snares pull together, what is the result of the membrane and proteins
involved? - ANS There is a tension supplied by the t-snares and v-snares that results in
membrane fusion and the subsequent delivery of protein to the extracellular space.
Which of the following best describes the role of EF-Tu (elongation factor Tu) in elongation of
protein synthesis? - ANS It is involved in the correct binding of amino acyl tRNA to the A site of
the ribosome
Eukaryotic initiation begins with the assembly of ____ - ANS preinitiation complex
In the following picture, which arrow is pointing to the acceptor stem of tRNA? - ANS A
A scientist performs an experiment that uses a chemical inhibitor to inhibit a kinase enzyme in a
signaling pathway and this results in a decrease in signaling. If the scientist wanted to be sure
that this kinase was indeed responsible for the decrease in signaling, which of the following
would be the best to use? - ANS use of siRNA to the kinase mRNA in question
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