Following S phase, a human cell would have how many pairs of sister chromatids and individual DNA molecules?
A. 23 pairs of sister chromatids and 92 individual DNA molecules
B. 46 pairs of sister chromatids and 46 individual DNA molecules
C. 46 pairs of sister chromatids and 184 individual DNA molecules
D. 46 pairs of sister chromatids and 92 individual DNA molecules
E. 23 pairs of sister chromatids and 46 individual DNA molecules
Answer: D
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What reptilian taxon is extant (has at least some members that are still living; opposite of extinct)?
A. Ornithischia B. Squamata C. Saurischia D. theropods E. ichthyosaurs
G protein-linked receptors are transmembrane proteins that convert a(n) extracellular hormone signal into an
intracellular signal that affects certain cell processes. Indicate whether the statement is true or false.
An element is defined as a substance that:a
is composed of more than one kind of atom. b. is held together by covalent bonds. c. cannot be broken into simpler substances by chemical reactions. d. cannot burn. e. is soluble in both acid and base.
Green algae differ from land plants in that many green algae _____
A) are unicellular B) have plastids C) have alternation of generations D) have cell walls containing cellulose