In humans, the volume of an egg is 100 times the volume of a sperm. Compared to the amount of chromosomal DNA in an egg, the amount of chromosomal DNA in a sperm is
A) variable but usually less than one-hundredth that of the egg.
B) exactly one-hundredth that of the egg.
C) one-fourth that of the egg.
D) one-half that of the egg.
E) equal to that of the egg.
Answer: E
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During the cleavage stage of glycolysis, fructose-1, 6 biphosphate is broken down into
A. citric acid. B. two molecules of pyruvate. C. two molecules of ATP. D. two molecules of glyceraldehyde-3-phosphate. E. glucose.
Which mammalian lineage has two species of spiny anteaters (echidnas) and the duck-billed platypus as the only known living members?
a. Marsupialia b. Monotremata c. Strepsirhini d. Rodentia
Which of the following statements describes one difference between DNA replication in prokaryotes and DNA replication in eukaryotes?
A. Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many. B. The rate of elongation during DNA replication is slower in prokaryotes than in eukaryotes. C. Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do not. D. Prokaryotic chromosomes have histones, whereas eukaryotic chromosomes do not.
The stage that is most similar in all three groups is:
a. stage 1. c. stage 3. b. stage 2. d. stage 4.