A) lipids
B) steroids
C) amino acids
D) nucleotides
E) sugars - ANS-amino acids
Which of the following would most readily give up H+ ions in a solution?
A) coffee pH 5
B) ammonia pH 11.5
C) cola pH 3
D) lemon juice pH 2
E) water pH 7 - ANS-lemon juice pH 2
The valence of an atom represents its
A) electronegativity
B) ability to interact with other atoms
C) ability to interact with water
D) ability to attract electrons
E) radioactivity - ANS-ability to interact with other atoms.
Hydrophobic molecules tend to be ____________ by water.
A) repelled
B) mixed
C) attracted
D) absorbed - ANS-repelled
An atom becomes an ion when
A) it gains or loses neutrons.
B) it gains or loses protons.
C) hydrogen ions are shared.
D) it forms a covalent bond.
, E) it gains or loses electrons. - ANS-it gains or loses electrons.
Nucleic acids, proteins, and complex carbohydrates are all produced by
A) catabolic reactions.
B) hydrolytic reactions.
C) hydrogen bonding.
D) exchange reactions.
E) dehydration synthesis. - ANS-dehydration synthesis.
The structural backbone of any membranous structure in a cell is the
A) the phospholipid bilayer.
B) membrane bound proteins.
C) glycolipids.
D) glycoproteins.
E) steroids. - ANS-the phospholipid bilayer.
Antoni van Leeuwenhoek was the first person in history to
A) use a magnifying glass.
B) view microorganisms and record these observations.
C) disprove spontaneous generation.
D) use the germ theory of disease.
E) develop a taxonomic system. - ANS-view microorganisms and record these
observations.
Hydrolysis could be correctly described as the
A) constant removal of hydrogen atoms from the surface of a carbohydrate.
B) heating of a compound in order to drive off it's excess water and to concentrate its
volume.
C) the breaking of a long-chain compound into its subunits by adding water to its
structure.
D) None of the above are true. - ANS-the breaking of a long-chain compound into its
subunits by adding water to its structure.
The study of the body's defenses against pathogens is called
A) chemotherapy
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