The inner membrane of mitochondria folds back on itself to form

a. plastids.
b. cristae.
c. centrioles.
d. nucleoli.
e. microfilaments.


B

Biology & Microbiology

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Which is the dominant greenhouse gas leading to global warming of the atmosphere?

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An example of one of the ways a pH buffer helps to maintain homeostasis is to

A. increase the H+ concentration if pH decreases. B. reduce the H+ concentration if pH decreases. C. reduce the H+ concentration if pH increases. D. increase the OH- concentration if pH increases. E. reduce the OH- concentration if pH decreases.

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The number of different proteins a cell can produce is often much larger than the number of genes in

that cell. Indicate whether the statement is true or false.

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Alveoli

A) are blind sacs that extend from tracheae. B) are found in gills. C) are thick-walled. D) are not permeable to dissolved oxygen. E) have a moist surface.

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