Bacteriophages engage in two interactive cycles with bacteria. What are these cycles?
A) lytic and prototrophic
B) heteroduplex and homoduplex
C) lytic and lysogenic
D) negative and positive
E) auxotrophic and prototrophic
C
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Which of the following concepts explains why the wings of a chicken and a robin are different?
a. homologous structure b. analogous structure c. modern synthesis d. microevolution
The genetic code is a ________ codon.
Fill in the blank(s) with the appropriate word(s).
Runoff of chemical fertilizers is a major cause of eutrophication in bodies of water. Which of the following will likely occur first, as a result of eutrophication of a pond ecosystem?
A) higher carbon dioxide (CO2) levels B) many fish dying C) lower dissolved oxygen (O2) levels D) an algal bloom
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
A. To generate and maintain the proton gradient essential for ATP production. B. To separate the ATP from the ADP. C. Because electrons cannot float in the matrix. D. Because NADH cannot localize to the mitochondrial matrix.