BIO 230 EXAM Q&A
which of the following does not contain sugars ? - ANSWER-steroids
what is not true of RNA? - ANSWER-It cannot base-pair with other nucleic acids.
what type of bond links two polynucleotide chains to each other in a double helix of
DNA ? - ANSWER-hydrogen bonds
what chemical group is found in a nucleotide but not in a nucleoside? - ANSWER-
Phosphate
what reaction involving ATP releases a large amount of energy? - ANSWER-the
release of the terminal phosphate group
which chemical group is found in all amino acids ? - ANSWER-carboxylic acid group
what type of reaction is the reverse of a condensation reaction? - ANSWER-
hydrolysis
how are covalent bonds in the cell rapidly broken ? - ANSWER-by enzyme catalysis
that is specific between protein and substrate
how do protein, nucleic acid, and polysaccharide molecules polymerize (grow in
length)? - ANSWER-By condensation reactions
Why can radioisotopes substitute for non-radioactive isotopes of elements in
experiments? - ANSWER-Because radioisotopes of an element differ only in the
number of neutrons, they still behave the same way chemically.
in water, hydrogen bonds can form between which of the following? - ANSWER-a
hydrogen atom of one water molecule and an oxygen atom of another
which of the following covalent bonds is relatively nonpolar? - ANSWER-bond
between carbon and hydrogen, -C-H
Which type of covalent bond allows for rotation about the bond axis? - ANSWER-
single bond
approximately how much does a mole of carbon atoms (each having an atomic
weight of 12) weigh? - ANSWER-12 g
which of the following changes should improve water solubility? - ANSWER-adding a
hydroxyl group
what is a drawback to using electron microscopy? - ANSWER-It cannot be used to
view living cells.
, which of these cannot be resolved with a conventional light microscope? - ANSWER-
ribosome
what technique did Frye and Edison likely use to examine the mouse and the human
proteins? - ANSWER-fluorescence microscopy
which statement represents the cell theory ? - ANSWER-All cells are formed by the
growth and division of existing cells.
Why do cell biologists study yeast? - ANSWER-Yeast is as closely related to animals
as it is to plants.
Why do cell biologists study yeast? - ANSWER-Yeast carries out all the basic tasks
that a eukaryotic cell must perform.
Regarding acids, bases, and pH, which of these statements is true? - ANSWER-
Substances that release protons when they dissolve in water are termed acids and
result in a pH lower than 7.
which of the following atoms is most likely to participate in an ionic bond ? -
ANSWER-chlorine, with an outer electron shell filled with seven of a possible eight
electrons
which statement is true of hydrophilic molecules? - ANSWER-They mix well with
water.
Carbon, which has four electrons in its outer shell (with a capacity of eight electrons),
can form a maximum of how many covalent bonds with other atoms? - ANSWER-4
Which bond term describes a covalent bond in which electrons are shared
unequally? - ANSWER-polar
which 4 elements make up 96% of the weight of living organisms? - ANSWER-
oxygen, carbon, hydrogen, nitrogen
ATP is a crucially important energy carrier in cells - ANSWER-true
which of the following changes should improve water solubility? - ANSWER-adding a
carboxyl group
on the basis of weight, which is the most abundant in a living bacteria
cell? - ANSWER-water
which term best describes a fatty acid ? - ANSWER-amphipathic
what type(s) of bonds link together the components of a ribosome? - ANSWER-both
the types of bonds that involve the sharing of electrons between atoms and the types
of bonds that involve electrostatic interactions between atoms
which of the following does not contain sugars ? - ANSWER-steroids
what is not true of RNA? - ANSWER-It cannot base-pair with other nucleic acids.
what type of bond links two polynucleotide chains to each other in a double helix of
DNA ? - ANSWER-hydrogen bonds
what chemical group is found in a nucleotide but not in a nucleoside? - ANSWER-
Phosphate
what reaction involving ATP releases a large amount of energy? - ANSWER-the
release of the terminal phosphate group
which chemical group is found in all amino acids ? - ANSWER-carboxylic acid group
what type of reaction is the reverse of a condensation reaction? - ANSWER-
hydrolysis
how are covalent bonds in the cell rapidly broken ? - ANSWER-by enzyme catalysis
that is specific between protein and substrate
how do protein, nucleic acid, and polysaccharide molecules polymerize (grow in
length)? - ANSWER-By condensation reactions
Why can radioisotopes substitute for non-radioactive isotopes of elements in
experiments? - ANSWER-Because radioisotopes of an element differ only in the
number of neutrons, they still behave the same way chemically.
in water, hydrogen bonds can form between which of the following? - ANSWER-a
hydrogen atom of one water molecule and an oxygen atom of another
which of the following covalent bonds is relatively nonpolar? - ANSWER-bond
between carbon and hydrogen, -C-H
Which type of covalent bond allows for rotation about the bond axis? - ANSWER-
single bond
approximately how much does a mole of carbon atoms (each having an atomic
weight of 12) weigh? - ANSWER-12 g
which of the following changes should improve water solubility? - ANSWER-adding a
hydroxyl group
what is a drawback to using electron microscopy? - ANSWER-It cannot be used to
view living cells.
, which of these cannot be resolved with a conventional light microscope? - ANSWER-
ribosome
what technique did Frye and Edison likely use to examine the mouse and the human
proteins? - ANSWER-fluorescence microscopy
which statement represents the cell theory ? - ANSWER-All cells are formed by the
growth and division of existing cells.
Why do cell biologists study yeast? - ANSWER-Yeast is as closely related to animals
as it is to plants.
Why do cell biologists study yeast? - ANSWER-Yeast carries out all the basic tasks
that a eukaryotic cell must perform.
Regarding acids, bases, and pH, which of these statements is true? - ANSWER-
Substances that release protons when they dissolve in water are termed acids and
result in a pH lower than 7.
which of the following atoms is most likely to participate in an ionic bond ? -
ANSWER-chlorine, with an outer electron shell filled with seven of a possible eight
electrons
which statement is true of hydrophilic molecules? - ANSWER-They mix well with
water.
Carbon, which has four electrons in its outer shell (with a capacity of eight electrons),
can form a maximum of how many covalent bonds with other atoms? - ANSWER-4
Which bond term describes a covalent bond in which electrons are shared
unequally? - ANSWER-polar
which 4 elements make up 96% of the weight of living organisms? - ANSWER-
oxygen, carbon, hydrogen, nitrogen
ATP is a crucially important energy carrier in cells - ANSWER-true
which of the following changes should improve water solubility? - ANSWER-adding a
carboxyl group
on the basis of weight, which is the most abundant in a living bacteria
cell? - ANSWER-water
which term best describes a fatty acid ? - ANSWER-amphipathic
what type(s) of bonds link together the components of a ribosome? - ANSWER-both
the types of bonds that involve the sharing of electrons between atoms and the types
of bonds that involve electrostatic interactions between atoms
