Which protein binds and releases oxygen molecules?
a. collagen
b. insulin
c. keratin
d. hemoglobin
e. enzymes
ANSWER: d
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The difference between a drupe and a berry is that a drupe:a
is an accessory fruit, while a berry is a multiple fruit. b. is formed from a single carpel, while a berry is formed from many carpels. c. has a stony pit around a single seed, while a berry is fleshy throughout with many seeds. d. is a dry fruit, while a berry is a fleshy one. e. splits open along two sutures, while a berry splits open along one suture.
The expression of a gene to form a polypeptide occurs in two major steps. What are these two steps in their correct chronological order?
a) transcription and then replication b) translation and then transcription c) transcription and then translation d) replication and then translation e) replication and then transcription
How might anthropogenic enhancement of the greenhouse effect result in increased primary production?
A) Warmer temperatures would lengthen the growing season and speed metabolism. B) Enhanced CO2 concentrations would increase the rate of photosynthesis. C) both of the above
What are two typical testcross ratios?
A) 1:1 and 1:1:1:1 B) 3:1 and 1:1:1:1 C) 1:1 and 9:3:3:1 D) 3:1 and 9:3:3:1