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O Chem 2 exam 3
Terms in this set (27)
What is the function of enzymes within a living system?
In a conjugated enzyme, the protein portion is the ______ and metal ion portion is the ______.
interaction with a substrate occurs
An enzyme active site is the location in an enzyme where
it will vary depending on the enzyme
The optimum pH for enzyme activity within the human body is always within the pH range of
An enzyme that catalyzes the hydrolysis reaction of the peptide bond in many different proteins would be described as showing
can end in either -ase or -in
Enzymes have names that
oxidoreductase - reduction of a substrate
In which of the following is the pairing between enzyme type and enzyme function correct?
biotin and niacin
In which of the following pairs of vitamins are both members of the pair water-soluble?
vision and bone formation.
Vitamins A and C are important, respectively, in
components of coenzymes.
The major function for B vitamins within the human body are
All of the B vitamins, except one, contain heterocyclic nitrogen ring systems as part of their structure. The exception is
vitamin E; an antioxidant.
Which of the following pairings of vitamin and function is correct?
RNA nucleotides contain _________ _________ than DNA nucleotides.
35 % T, 15 % C, and 15 % G
If you measure the amounts of the bases in a sample of DNA and find that 35 % of the bases are A, then the amounts of the other bases are.......
hydrophobic interactions between the bases
What is the driving force for the formation of the DNA double helix?
each DNA helix would have one radioactive strand and one non-radioactive strand
In an experiment, a scientist feed radioactive DNA material to a cell that was previously non-radioactive. After the cell duplicated its DNA, which statement would be true?
the replica strands are complementary to the templates
In DNA replication .......
The letter D in the name DNA stands for
Which of the following nitrogen-containing heterocyclic bases is not a component of DNA?
The "backbone" of a nucleic acid molecule consists of an alternating sequence of sugar and phosphate residues are held together by
base pairing between nucleotide strands always involves one purine base and one pyrimidine base
Which of the following statements concerning the double helix structure of DNA is correct?
The primary function of DNA is the storage and transfer of genetic information.
RNA and DNA differ only in the identity of the pentose in their nucleotides.
Adenine, guanine and uracil are found in both DNA and RNA.
The "backbones" of DNA and RNA molecules are identical.
The sequence of bases in a nucleic acid strand is always read in the 5' to 3' direction.
The two polynucleotide strands in a DNA double helix are always parallel.
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