A ribosome is made of
a. rRNA and proteins.
b. tRNA and rRNA.
c. tRNA, rRNA, and mRNA.
d. rRNA and mRNA.
e. tRNA, rRNA, and proteins.
A
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If there are two alleles for a gene in a population, and the frequency of the dominant allele (p) is .5, then the frequency
of the recessive allele (q) is ____.
a. .5 b. .025
c. .25 d. .75 e. .05
The presence of cytoplasmic organelles is characteristic of
a. Archaea only. b. Bacteria only. c. both Archaea and Bacteria. d. neither Archaea nor Bacteria. e. Achaea, Bacteria and Eukarya.
Bones of trained athletes may be visibly thicker and heavier than those of nonathletes because
A) athletes have lower blood calcium levels than nonathletes. B) weight-bearing exercise increases bone mass and strength. C) nonathletes have a low parathyroid hormone rate. D) athletes produce more growth plates. E) nonathletes produce fewer osteoids.
Diagram B in the figure below could represent the cell of an organism with a diploid number of ____ undergoing ___.
A. 4; meiosis I
B. 8; meiosis I
C. 4; meiosis II
D. 8; meiosis II