In a major protein degradation pathway, a short polypeptide called _______ is attached to a protein to target it for destruction.
a. glutathione
b. ubiquinone
c. ubiquitin
d. KDEL
Ans: c. ubiquitin
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Which DNA repair mechanism uses DNA-N-glycolases?
A. Recombinational repair B. Direct repair C. Base excision repair D. Mismatch repair E. Nucleotide excision repair F. Nonhomologous end joining (NHEJ)
The first jawless fishes evolved by about ____ million years ago
a. 120 b. 270 c. 380 d. 480 e. 650
__________ is the least frequent of the dispersal patterns seen in nature
a. Random dispersion b. Aggregated distribution c. Uniform dispersion d. Density-dependent distribution e. Clumped dispersion
A mutation causes a gene to become overactive, contributing to uncontrolled cell growth. Which term best describes this gene?
A. tumor-suppressor gene B. oncogene C. spliced gene D. malignant gene E. alternatively spliced gene