Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced. Bicarbonate is acting as a ____ in blood.

A. acid
B. alkaline
C. buffer
D. base


C. buffer

Biology & Microbiology

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The light reactions of photosynthesis, which form ATP and NADPH, take place in the

A. thylakoid membrane. B. cytoplasm. C. stroma. D. nucleus.

Biology & Microbiology

In step 2 (above) in the identification of the colony that contains a targeted gene, ____

a. bacterial cells are cloned b. bacterial colonies are transferred c. bacterial cells are ruptured d. DNA is lysed e. cells with the targeted gene are identified

Biology & Microbiology

Proteins differ from one another because

A) the peptide bonds linking amino acids differ from protein to protein. B) the sequence of amino acids in the polypeptide chain differs from protein to protein. C) each protein contains its own unique sequence of sugar molecules. D) the number of nucleotides found in each protein varies from molecule to molecule.

Biology & Microbiology

In the figure above, the population is:

a. highly fit. b. small in population size. c. experiencing background selection. d. experiencing drift. e. in equilibrium.

Biology & Microbiology