Eukaryotic cells can regulate large sets of genes together by:
A. regulating ribosomal protein pre-mRNA splicing in the nucleus.
B. controlling mRNA stability.
C. controlling translational efficiency.
D. All of the choices are correct.
D
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Asexually produced spores will result in offspring that
a. have no mating type. b. are genetically distinct from the parent fungus. c. are clones of the parent fungus. d. have a different mating type from the parent fungus. e. are unable to reproduce.
Polyploidy can be described as ____
a. only occurring artificially
b. only occurring when there is one set of chromosomes c. fatal to all living things d. occurring in about 20% of flowering plants e. fatal in humans but common in flowering plants
Most of the carbon now present in the earth's
atmosphere will eventually end up in what two reservoirs? a. plants and animals b. plants and decomposers c. plants and soil d. plants and oceans e. plants and fossil fuels
Which of the following events involves the exchange of gases across a cell membrane?
A. Internal respiration only B. External respiration and internal respiration C. Ventilation and external respiration D. External respiration only E. Ventilation only