Name the substance that serves as the hereditary material in eukaryotes and prokaryotes
A) DNA or deoxyribonucleic acid
B) protein
C) lipid
D) RNA or ribonucleic acid
E) carbohydrate
Answer: A
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Which of the following imaging techniques detects differences in blood flow to particular regions through detection of differences in the relative proportions of oxygenated and deoxygenated hemoglobin?
A. X-ray B. CT scan C. MRI scan D. fMRI scan E. sonogram
Brassica oleracea was a European wild plant. Early farmers were able to use artificial selection on this plant to produce cabbage, Brussels sprouts, kohlrabi, kale, broccoli, and cauliflower. This diversification through selection was possible because:
A. artificial selection is always possible, whereas natural selection requires much larger population sizes. B. the species contained large amounts of genetic variation. C. artificial selection does not require differential reproductive success, whereas natural selection does. D. artificial selection is only done on plants that are used for food, whereas natural selection is used on all other plants.
When she finds that the introduced strand separates into single-stranded RNAs, what other evidence of this single-stranded RNA piece's activity can she find?
A) She can measure the degradation rate of the remaining single strand. B) The rate of accumulation of the polypeptide encoded by the target mRNA is reduced. C) The amount of miRNA is multiplied by its replication. D) The cell's translation ability is entirely shut down.
When during the cell cycle is a cell's DNA replicated?
A) G1 phase B) G2 phase C) S phase D) M phase