What is the relationship between body proteins and water?
a. Proteins attract water.
b. Water attracts proteins.
c. Water degrades proteins.
d. Proteins form polymers of water.
e. Proteins repel water.
Q. 2What is opsin?
a. An antigen
b. An antibody
c. A light-sensitive protein
d. A blood transport protein
e. A sterol
Q. 3What function does a buffer perform?
a. It helps emulsify fats.
b. It helps maintain a constant pH.
c. It facilitates chemical reactions.
d. It helps protect against plaque buildup.
e. It prevents degradation of proteins.
Q. 4How do sodium and potassium travel into and out of cells?
a. Antidiuretic hormone transports potassium and prodiuretic hormone carries sodium.
b. Specific transport proteins in the blood deliver the minerals to the cell cytoplasm.
c. The balance of insulin and glucagon determines the movement of these minerals into and out of cells.
d. Transport proteins within the cell membrane pick up and release the minerals across the membrane.
e. A negative feedback loop uses blood glucose levels for transfer.
Q. 5What type of protein would the body make in order to heal a wound?
a. Ferritin
b. Albumin
c. Collagen
d. Hemoglobin
e. Enzyme
Q. 6A common genetic variation which causes a change in the amino acid sequence in the structure of hemoglobin leads to the disease ____.
a. diabetes
b. marasmus
c. phenylketonuria
d. sickle-cell anemia
e. hemolytic anemia
Q. 7What is a ribosome?
a. A template for protein synthesis
b. A hard knot of subcutaneous protein mass
c. A structure upon which proteins are assembled
d. An antibody synthesized by specialized immune cells
e. The product of failed protein synthesis
Q. 8What best describes the structure of pepsin?
a. Lipid
b. Protein
c. Nucleic acid
d. Carbohydrate
e. Sterol
Q. 9What is the usual fate of orally ingested enzyme supplements?
a. Digestion by gastrointestinal proteases
b. Rapidly degradation by salivary secretions
c. Almost complete absorption in original form from the stomach
d. Complete absorption in original form from the jejunum
e. Rapid excretion through the digestive system
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