Which region has seen the largest increase in ectotherm metabolic rate?
A) Arctic
B) north temperate
C) tropical
D) south temperate
C
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Cell plate formation
a. occurs in plant cells but not in animal cells. b. usually begins during telophase. c. is a result of fusion of Golgi vesicles. d. is all of the above.
If a tumor suppressor gene becomes mutated, which of the following is not true?
A. Genes that inhibit the cell cycle are not turned on. B. The cell cycle continues when it should not. C. Apoptosis is less likely to occur. D. Genes that encode enzymes that repair DNA are not turned on. E. A "gain-of function" mutation has occurred.
Mitochondrial and chloroplast genomes typically
A) are composed of primarily noncoding DNA. B) encode all of the proteins needed for aerobic respiration and photosynthesis, respectively. C) encode for ribosomal and transfer RNAs. D) encode some of the proteins needed for aerobic respiration and photosynthesis, respectively. E) encode some of the proteins needed for aerobic respiration and photosynthesis, respectively, as well as ribosomal and transfer RNA.
When amino acids are degraded in cells, into what intermediate(s) of the aerobic respiration process are the carbon skeletons of amino acids primarily converted?
A. pyruvate and Krebs cycle intermediates B. pyruvate and acetyl-CoA C. Krebs cycle intermediates D. pyruvate E. acetyl-CoA