The purines of DNA are
A. adenine and guanine.
B. thymine and adenine.
C. serine and threonine.
D. thymine and uracil.
E. thymine and adenine AND thymine and uracil.
A
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Cellular respiration is a series of _____ reactions
A. catabolic B. anabolic C. glycolytic D. phosphorylation E. carboxylation
Alternative forms of a gene are called ________
Fill in the blank(s) with correct word
In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by _____
A) hydrogen bonds B) nonpolar covalent bonds C) polar covalent bonds D) ionic bonds
A cell wall can increase a bacterium's virulence because cell wall lipid A
A) All bacteria have a cell wall and all are not pathogenic; therefore, cell walls do not contribute to virulence. B) Helps the bacterium attach. C) Resists phagocytosis. D) Destroys host tissues. E) is toxic