1. Checkpoints during the cell cycle process allow cells to: a. detect DNA damag
ID: 45706 • Letter: 1
Question
1. Checkpoints during the cell cycle process allow cells to:
a. detect DNA damage
b detect improper spindle formation during mitosis
c check for unreplicated DNA following DNA synthesis (S phase)
d all of the above
2. The first amino acid incorporated into almost all proteins synthesized in eukaryotic cells is a(n) ____________.
a. methionine
b. arginine
c. valine
d. alanine
3. Signaling through G coupled proteins leads to a series of intracellular signals. Choose the letter below that corresponds to the correct order of these signals.
a. activation of protein kinase A (PKA); formation of cyclic AMP (cAMP); activation of adenylyl cyclase
b. formation of cyclic AMP (cAMP); activation of adenylyl cyclase; activation of protein kinase A (PKA)
c. activation of adenylyl cyclase; formation of cyclic AMP (cAMP); activation of protein kinase A (PKA)
4. What is the function of the signal sequence located at the amino terminus of a protein
a. It directs the placement of the RNA on the protein portion of the ribosome.
b. It allows a protein to be directed to the nucleus, where it can function in transcriptional regulation.
c. It allows a protein to be directed and inserted into the endoplasmic reticulum so that it can be secreted by the cell.
5. Introns:
a. represent DNA sequences of a gene that are translated into protein
b. represent DNA sequences of a gene that are not translated into protein
c. are found more frequently in eukaryotes than bacteria
d. are found more frequently in bacteria than in eukaryotes
e. a and c
f. b and c
6. Which of the following is not an example of epigenetic inheritance?
a the inheritance of methylation patterns in DNA
b the inheritance of a single nucleotide mutation in the DNA
c the inheritance of patterns of chromosome condensation
7. Which of the following is not a small intracellular signaling molecule (second messenger)?
a cyclic AMP
b phospholipase C
c inositol triphosphate
d diacylgylcerol
8. DNA replication results in:
a Two DNA molecules, one with 2 old strands, one with 2 new strands
b Two DNA molecules, each of which has 2 new strands
c Two DNA molecules, each of which has 1 new strand and 1 old strand
Explanation / Answer
Answer:
1)d all of the above
2)a. methionine
3)c. activation of adenylyl cyclase; formation of cyclic AMP (cAMP); activation of protein kinase A (PKA)
4)c. It allows a protein to be directed and inserted into the endoplasmic reticulum so that it can be secreted by the cell.
5)f. b and c
6)b the inheritance of a single nucleotide mutation in the DNA
7)b phospholipase C
8)c Two DNA molecules, each of which has 1 new strand and 1 old strand
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