Which of the following molecules can be used as a substrate for cellular respiration?
a. glucose only
b. glucose and lipids only
c. glucose and proteins only
d. glucose, lipids, and proteins only
e. glucose, lipids, proteins, and fatty acids
e
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The fusion of the nuclei in a dikaryotic cell is called ____
a. osmosis b. karyogamy c. mutualism d. plasmogamy e. symbiosis
In animal skeletal muscles, white muscle fibers ____
a. have an abundance of myoglobin b. make ATP by lactate fermentation c. produce ethanol d. are good for sustained activities e. are not found in chickens
Trypanosoma cruzi
A. Belongs to the phylum Apicomplexa; intracellular; located in the blood; sexual and asexual reproduction; indirect life cycle B. Belongs to the phylum Euglenozoa; extracellular; located in the small intestine; asexual reproduction; direct life cycle C. Belongs to the phylum Apicomplexa; intracellular; located in the small intestine; sexual and asexual reproduction; direct life cycle D. Belongs to the phylum Euglenozoa; intracellular; located in blood and different body tissues; asexual reproduction; indirect life cycle
Levels of Cdk activity change during the cell cycle, in part because ________________
(a) the Cdks phosphorylate each other. (b) the Cdks activate the cyclins. (c) Cdk degradation precedes entry into the next phase of the cell cycle. (d) cyclin levels change during the cycle.