MCB 2010 Exam 1
Proteins are made up of
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
Proteins are made up of
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
