Eukaryotes have at least three main mechanismsfor regulating translation. Which of the following is not one of those mechanisms?
A. Initiation factorsare subject to phosphorylation by protein kinases.
B. Some proteins bind directly to mRNA and act as translationalrepressors.
C. Intron-containing transcripts are targeted for export out of the nucleus by splicing factors.
D. Binding proteins can disruptthe interaction between eIF4E and eIF4G.
C
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Which of the following statement best describes the defining characteristics of members of the Class Testudines?
A. They lack teeth. B. They have a hard shell. C. They have a kinetic skull. D. They have both a hard shell and are lacking in teeth. E. They have both a kinetic skull and a hard shell.
The carbohydrate tree added to proteins targeted to the primary lysosome is added on an amino acid different from the amino acid where the carbohydrate tree is added to a transmembrane protein.
a. true b. false
In which of the following processes is carbon dioxide reduced to form carbohydrate?
a. cellular respiration b. noncompetitive inhibition c. photosynthesis d. induced fit model
What is the difference between a point mutation and a chromosomal aberration?
Both are mutation types, but in a point mutation, the mutation occurs at a specific point anywhere on the chromosome. In a chromosomal aberration, the mutation is all throughout the chromosome. Both are mutation types, but in a point mutation, one base pair is changed, and in a chromosomal aberration, an entire section of the chromosome is altered. A chromosomal aberration is caused by DNA damage, while a point mutation is a mutation of a single base. A chromosomal aberration is an all-inclusive term for any DNA mutation, and a point mutation is a type of aberration. Point mutations occur at a specific point due to sunlight, whereas chromosomal aberrations can occur anywhere due to any type of DNA damage.