- Hemoglobin, which carries oxygen to the cell, is an example of what type of protein?
Your answer:
storage
structural
transport
hormone
- This amino acid is called
Your answer:
glycine
alanine
leucine
valine
- This amino acid would be
Your answer:
polar and hydrophilic
nonpolar and hydrophilic
nonpolar and hydrophobic
polar and hydrophobic
- An essential amino acid is an amino acid that
Your answer:
must be provided in the diet
is missing from the diet
is synthesized in the body.
does not exist as a zwitterion
- When alanine and lysine form an amide bond, the product would be
Your answer:
a dipeptide
alanyllysine (Ala-Lys)
lysylalanine (Lys-Ala)
All of the above
- In the tripeptide, Cys-Ser-Leu, the amino acid with the free amino end is
Your answer:
cysteine
serine
leucine
none of the above
- The alpha helix, beta-pleated sheet, and triple helix are examples of the
Your answer:
primary structure of a protein.
secondary structure of a protein.
tertiary structure of a protein.
quaternary structure of a protein.
- This type of cross link in a tertiary structure is known as
Your answer:
a hydrogen bond
an ionic bond
a hydrophobic attraction
a hydrophilic attraction
- In the tertiary structure of hair, cross links between the R groups of cysteine are known as
Your answer:
disulfide bonds
hydrophic attractions
ionic bonds
hydrogen bonds
- When the bonds that produce the tertiary structure of a protein are disrupted by agents such as heat, acid, or heavy metal ions, the process is known as
Your answer:
hydrolysis
denaturation
addition
amidation
- The class of enzymes that split peptide bonds or glycosidic bonds with water is
Your answer:
hydrolases
lyases
transferases
isomerases
- The class of enzymes that catalyzes this type of reaction is known as
Your answer:
hydrolases
oxidoreductases
ligases
isomerases
- In the Lock-and-Key model of enzyme action, the part of the enzyme that recognizes the substrate is known as the
Your answer:
enzyme-substrate complex
product
enzyme-product complex
active site
- Which of the following will increase the rate of an enzyme-catalyzed reaction?
Your answer:
Lowering the temperature to 0°C
Using a high temperature
Adding alcohol or heavy metal ions
Adding more substrate
- If a compound is a competive inhibitor,
Your answer:
it does not compete for the active site.
the addition of more substrate does not reverse the inhibition.
the addition of more substrate reverses the inhibition.
it does not have a structure similar to the substrate.