1.) Which of the following statements concerning cyclins is not correct? A) They
ID: 10586 • Letter: 1
Question
1.) Which of the following statements concerning cyclins is not correct?A) They are activated and degraded during the cell cycle.
B) They are regulatory subunits for enzymes that catalyze the phosphorylation of proteins.
C) They can become linked to ubiquitin.
D) They catalyze the phosphorylation of proteins.
E) They contain specific amino acid sequences that target them for proteolysis
2.) Proto-oncogenes can be transformed to oncogenes by all of the following mechanisms except:
A) chemically induced mutagenesis.
B) chromosomal rearrangements.
C) during a viral infection cycle.
D) elimination of their start signals for translation.
E) radiation-induced mutation.
Explanation / Answer
It's hard to answer these without just giving it away. I'll try to give you some hints: 1 - Cyclins bind cyclin-dependent kinases to regulate the activity of the kinase. Cyclins can cause the kinase they bind to phosphorylate other proteins, but cyclins are not catalytic themselves. 2 - If the proto-oncogene cannot be translated, it cannot make the protein that will damage the cell. If proto-oncogene is missing its _______ _________________, it cannot be translated.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.