How many molecules of water are needed to completely hydrolyze a polymer that is 9 monomers long?
The bonding of two amino acid molecules to form a larger molecule requires
the release of a water molecule.
the release of a carbon dioxide molecule.
the addition of a nitrogen atom.
the addition of a water molecule.
the release of a nitrous oxide molecule.
All of the following are polysaccharides except
The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. What is the result of adding hydrogens to vegetable oil?
The hydrogenated vegetable oil has a lower melting point.
The hydrogenated vegetable oil stays solid at room temperature.
The hydrogenated vegetable oil has more "kinks" in the fatty acid chains.
The hydrogenated vegetable oil has fewer trans fatty acids.
The hydrogenated vegetable oil is less likely to clog arteries.
All of the following contain amino acids except
At which level(s) of protein structure are interactions between the side chains (R groups) most important?
primary, secondary, tertiary, and quaternary
Which of the following statements best summarizes the differences between DNA and RNA?
DNA encodes hereditary information, whereas RNA does not.
The bases in DNA form base-paired duplexes, whereas the bases in RNA do not.
DNA nucleotides contain a different sugar than RNA nucleotides.
DNA contains the base uracil, whereas RNA contains the base thymine.
DNA encodes hereditary information, whereas RNA does not; the bases in DNA form base-paired duplexes, whereas the bases in RNA do not; and DNA nucleotides contain a different sugar than RNA nucleotides.
The element present in all organic molecules is
The experimental approach taken in current biological investigations presumes that
simple organic compounds can be synthesized in the laboratory from inorganic precursors, but complex organic compounds such as carbohydrates and proteins can only be synthesized by living organisms.
a life force ultimately controls the activities of living organisms, and this life force cannot be studied by physical or chemical methods.
although a life force, or vitalism, exists in living organisms, this life force cannot be studied by physical or chemical methods.
living organisms are composed of the same elements present in nonliving things, plus a few special trace elements found only in living organisms or their products.
living organisms can be understood in terms of the same physical and chemical laws that can be used to explain all natural phenomena.
How many electron pairs does carbon share in order to complete its valence shell?
A carbon atom is most likely to form which of the following bonds with other atoms?
covalent bonds and hydrogen bonds
ionic bonds, covalent bonds, and hydrogen bonds
Which of the following is not a monomer/polymer pairing?
Which of these molecules is not formed by dehydration reactions?
Which of the following is not a polymer?
What is the chemical reaction mechanism by which cells make polymers from monomers?
ionic bonding of monomers
the formation of disulfide bridges between monomers
Which of the following is true of cellulose?
It is a polymer composed of enantiomers of glucose.
It is a storage polysaccharide for energy in plant cells.
It is digestible by bacteria in the human gut.
It is a major structural component of plant cell walls.
It is a polymer composed of enantiomers of glucose, it is a storage polysaccharide for energy in plant cells, it is digestible by bacteria in the human gut, and it is a major structural component of plant cell walls.
Which of the following statements is true regarding the molecule illustrated in Figure 3.8?