What enzyme is used to synthesize daughter strands of DNA during PCR?
A) replicase
B) DNA polymerase
C) RNA polymerase
D) Taq polymerase
D
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Drosophila melanogaster has four pairs of chromosomes (including a pair of sex chromosomes). Sperm from this species are formed by a meiotic process in which homologous chromosomes pair and segregate but do not undergo crossing-over. How many genetically different kinds of sperm could be produced by a Drosophila melanogaster male (XY)?
A) 4 B) 8 C) 16 D) 64 E) 256
The passageway that channels ova from the
ovary into the uterus is known as
a. a vagina. b. a uterus. c. an oviduct. d. the corpus luteum. e. all of these
What controls circadian rhythms, and which environment sets this clock?
a. an internal clock; an external environment b. an artificial clock; a natural environment c. an external clock; an internal environment d. a natural clock; an artificial environment
Giardia lamblia and Trichomonas vaginalis are commonly seen flagellates. Their life cycles include cyst and trophozoite forms. The infective form of Trichomonas vaginalis is a ______, thus this flagellate must be passed from person to person.
A) Cyst B) Trophozoite