Smooth muscles
a. are not striated.
b. have spindle-shaped cells.
c. are found in the walls of hollow structures such
as blood vessels and the stomach.
d. are involuntary.
e. include all of these descriptions.
Answer: e
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How does ATP release energy that can be used by living cells?
A. By adding more phosphate groups to itself B. By being exposed to body heat C. By breaking a bond within an ATP molecule D. By being exposed to sunlight
When culturing a chemoorganoheterophic bacterium, what outcome is LEAST likely to occur if ammonia and phosphate are provided at equal concentrations?
A) Cells require much less P to grow than N, so extra P will be used for ATP synthesis and result in a faster growth rate. B) Cells will never consume all of the phosphate, because N is needed in higher quantities than P. C) The final biomass of cells will be no different than if only 50% of the phosphate was provided. D) The bacteria will import all of the ammonia to use for biosynthetic pathways.
During the Calvin-Benson cycle (carbon-fixing reactions), in the red Columbine plant, high-energy electrons are transferred into a newly made 3-carbon compound. Eventually these electrons will end up as part of glucose molecules. What was the original source of these electrons in photosynthesis?
a. glucose b. ATP c. oxygen d. water e. carbon dioxide
Which of these animals has a heart with only two chambers?
A) Hummingbird B) Cat C) Human D) Goldfish E) Bullfrog