Nerve impulses are electrical signals produced by which structure?
A. Plasma membrane of neuron
B. Neuromuscular junction
C. Synapse
D. Lipid sheath of Schwann cell
Answer: A
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Which enzyme would be BEST to include in a protein extract to refold and denature improperly folded proteins?
A) DnaK B) RepA C) RpoH D) Spo0A
Which statement best describes the relationship between a carpel and a pistil?
A. The two terms are merely two names for the same thing. B. A pistil is part of a male component of the flower whereas a carpel is part of a female component. C. A pistil can be composed of either a single carpel (in which case the two terms are synonymous) or of two or more carpels fused together. D. A pistil is a reproductive part of a flower whereas a carpel is a showy vegetative part. E. A pistil is part of the female component of a flower and a carpel is not even a flower part at all.
An RNA molecule is typically _____ ; a DNA molecule is typically _____
a. single-stranded; double-stranded b. double-stranded; single-stranded c. both are single-stranded d. both are double-stranded
The longer two species have been evolving on their own, the greater the number of _____________________ that accumulate between them.
a) homologous structures b) genes c) genetic differences d) genetic similarities e) convergences