Which statement is true of mitochondria?
a. Mitochondria are found only in prokaryotic cells.
b. ATP is formed by reactions that convert carbon dioxide and water into sugars.
c. ATP-producing reactions take place in the outer compartment.
d. Mitochondria possess their own DNA.
e. ATP producing reactions do not require oxygen.
ANSWER: d
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Organisms in natural environments can be detected by assaying for the presence of their genes
Indicate whether the statement is true or false.
The sea heats and cools
A. more quickly than the land. B. more slowly than the land. C. at the same rate as the land. D. three times a day. E. more quickly than the land and more slowly than the land.
If purple flower color is dominant in pea plants, a cross between true breeding P generation purple and white plants will
result in ____.
a. all white flowers in the F1 generation b. all purple flowers in the F1 generation c. all purple flowers in the F1 generation but a lighter purple than in the parents d. mostly purple flowers in the F1 generation, with an occasional white flower e. half of the plants having purple flowers and half having white flowers
Which of the following is the most difficult to inactivate?
A) enveloped viruses B) fungus spores C) bacterial endospores D) nonenveloped viruses E) protozoan cysts