Bacteria are able to respond quickly to their surroundings, such as in the presence of an abundant food source. This isbecause:a
genes for functionally related enzymes are regulated together in operons.
b. genes for functionally related enzymes are always constitutive.
c. genes for functionally related enzymes are always under positive control.
d. efficient protein degradation removes unneeded proteins quickly.
e. all bacterial genes are constitutive.
a
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An anticodon is located on ______
A. DNA B. mRNA C. rRNA D. tRNA E. snRNA
Which of the three genes is in the middle?
Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows:
A) px
B) sp
C) cn
D) insufficient data
The number of European rabbits in Australia is
currently controlled by a. two viruses. b. a 2,000-mile-long fence. c. pesticide application to grasslands. d. toxic species of grasses. e. fumigation and destruction of their burrows.
All of the following are functions of proteins except:
A) serving as transport molecules. B) serving as structural building materials. C) enzyme activity. D) storing genetic information. E) hormone activity.