Where would you expect to find proteins responsible for controlling the substances that enter and leave mitochondria?
a. plasma membrane of the cell
b. inner mitochondrial membrane
c. outer mitochondrial membrane
d. nuclear membrane
e. lysosomal membrane
ANSWER: b
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Which one of the following statements about diplomonads and parabasilids is false?
A. Absence of mitochondria in these groups is an ancestral trait. B. Some members are parasitic, but some also engage in mutualism. C. Diplomonads and parabasilids belong to different clades D. Both groups are flagellated protists.
According to the intermediate disturbance
hypothesis, a. species richness becomes greatest in between disturbances of moderate intensity or frequency. b. a disturbance is necessary during succession in order to stabilize the community. c. community succession is highly predictable. d. competition and other species interactions are the most important factors in shaping community structure. e. a community reverts to a climax state after a disturbance.
In Figure 8.2, if base 4 is thymine, what is base 4'?
A) Thymine B) Guanine C) Cytosine D) Adenine E) Uracil
Karyotyping involves taking pictures of chromosomes during
a. prophase. b. telophase. c. metaphase. d. interphase. e. anaphase.