Which of the following statements about the electron transport chain is true?
a. Protons are pumped out of the mitochondria by the complexes of the electron transport chain.
b. The proton gradient established during electron transport is a form of potential energy.
c. The electron transport chain can be found in the mitochondria of aerobic bacteria and other cells.
d. The movement of protons down a concentration gradient is an endergonic process.
e. ATP synthesis associated with the electron transport chain is an example of substrate level phosphorylation.
b
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According to the pressure flow theory, sugars move in phloem because of ________
a. negative pressure from removal of sugars at sinks b. active transport by living sieve-tube and companion cells c. all of the choices d. internal pressure building up in sieve tubes at a source
What is in the outer cytoplasmic layer of radiolaria?
a. nucleus b. contractile vacuoles c. algae d. mitochondria e. gas filled vacuoles
A reaction that releases energy is ________.
A. endergonic B. impossible C. None of the choices are correct. D. exergonic
For the calico coloration in cats, which of the
following is NOT true? a. Orange color is on one X chromosome. b. Black color is on one X chromosome. c. White is the result of another gene that blocks all pigment production. d. The color white is found on the Y chromosome. e. It does not occur in males.