41.What an oligopeptide?
a.a sulphur-containing amino acid
b.a string of about 4–9 : 1401585.
41.What is an oligopeptide?
a.a sulphur-containing amino acid
b.a string of about 4–9 amino acids
c.a carbohydrate-containing protein
d.a protein containing only essential amino acids
42.Which of the following sources of amino acids would be best absorbed in normal, healthy people?
a.whole proteins
b.predigested proteins
c.proteins from raw foods
d.mixture of free amino acids
43.Which of the following statements best describes the fate of anabolic enzymes?
a.They are integrated into molecules formed by the reactions they catalyze.
b.They are denatured after catalyzing a reaction.
c.They are unchanged after catalyzing the formation of a new product.
d.They can catalyze only one reaction before being broken down.
44.Which of the following is a fate of amino acids in the intestinal tract?
a.used for energy by the intestinal cells
b.Some diffuse into intestinal cells for transport to the blood.
c.fermented by gut bacteria
d.undergo active transport from intestinal cells to the lymphatic system
45.Approximately how many different proteins are present in the human body?
a.500
b.10,000
c.20,000
d.30,000
46.Which of the following best represents the study of the body’s proteins?
a.It is known as proteomics.
b.All proteins of the proteome participate in the same basic functions.
c.Most of the body’s thousands of proteins have been studied and characterized.
d.An individual’s genetic code changes across their lifecycle.
47.Which of the following describes a process in protein synthesis?
a.The code to make a protein is carried by a strand of messenger RNA.
b.The final step in completing the protein is carried out in the mitochondria.
c.The function of transfer RNA is to assist in absorption of amino acids into the cell.
d.The DNA binds to ribosomes and directs uptake of specific amino acids to form the peptide chain.
48.Which of the following is a correct sequence of steps within protein synthesis?
a.mRNA separates from ribosomes, tRNA lines up amino acids in sequence along mRNA, mRNA copies DNA in the nucleus.
b.DNA is a template for mRNA, mRNA travels from nucleus to ribosomes, tRNA lines up amino acids in sequence along mRNA
c.tRNA collects amino acids from cell fluid, mRNA travels from nucleus to ribosome, a new protein strand replicating mRNA is complete
d.DNA is a template for tRNA, mRNA collects amino acids from cell fluid, tRNA separates from rebosomes
49.Which of the following is the process whereby messenger RNA is made from a DNA template?
a.expression
b.sequencing
c.transcription
d.ribosome assembly
50.What 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
41.What an oligopeptide?
a.a sulphur-containing amino acid
b.a string of about 4–9 : 1401585
