Exam 4

an amino group and a carbonyl group
Every amino acid contains which two functional groups?
hydrogen bond formation between C O and N H of the peptide bond
The secondary structure of proteins forms through which of the following types of interactions?
amphoteric
Which term indicates that a substance can be both an acid and a base?
amide
What type of linkage is the peptide bond?
connective tissues
Collagen’s unique structure is why it is found in such high concentrations in:
primary
Which one of the following levels of protein structure has the greatest influence on the structure of the other three? (primary, secondary, tertiary, or quaternary)
quaternary
Which one of the following levels of protein structure describes the interactions between the four separate polypeptide chains of hemoglobin? (primary, secondary, tertiary, or quaternary)
tertiary
Which one of the following levels of protein structure describes the folding of most protein molecules into their functional configuration?
secondary
Which one of the following levels of protein structure is responsible for specialized structural areas in proteins such as myosin and collagen?
coenzyme A
Which coenzyme is produced from the vitamin, pantothenic acid?
decrease the activation energy
How do enzymes increase the rate of a reaction?
double the rate
A doubling of the enzyme concentration would have which of the following effects on the rate of an enzyme catalyzed reaction?
active site
At what place on the enzyme molecule is a cofactor always bound?
the enzyme is saturated
What is occurring at Vmax for an enzyme catalyzed reaction?
competitive
If the inhibition by a substance can be overcome by increasing the substrate concentration, the substance is what type of inhibitor?
non-competitive
If the inhibition by a substance cannot be overcome by increasing the substrate concentration, the substance is what type of inhibitor?
hydrogen bonds
The two DNA strands of the double helix are held together by what type of interactions?
complementary and anti-parallel (both c and d)
The two strands of DNA in a DNA molecule are said to be:
nucleosome
The structure formed by the wrapping of DNA around a core of histone proteins is termed?
aminoacyl tRNA synthetases
The class of enzymes which covalently link the amino acid with its respective tRNA are the:
The anticodon of the tRNA
How is an aminoacyl tRNA recognized at the ribosome?
A site
In which site on the ribosome is the peptide bond formed?
peptidyl transferase
What is the enzyme responsible for the formation of the peptide bond?
mRNA, tRNA, and rRNA (a, b and c)
Which RNA molecules function in protein synthesis?
DNA polymerase I
Which enzyme removes the primers from the Okazaki fragments and inserts sections of DNA?
DNA ligase
Which enzyme joins the Okazaki fragments into a continuous DNA strand?