Amino acids are assembled within the cells to form:
a. nucleic acids.
b. triglycerides.
c. phospholipids.
d. polypeptides.
e. DNA.
D
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Members of this lineage of flatworms are free-living and are found mostly in marine environments
Most acquire food with a muscular pharynx and are hermaphroditic.
a. Trematoda b. Turbellaria c. Polychaeta d. Cestoda e. Hirudinea
Which of the following diseases is NOT caused by viruses?
the common cold and influenza smallpox and mononucleosis polio and rabies AIDS and warts diabetes
When the intracellular level of lactose drops, the repressor protein binds to the operator of the lac operon and shuts
down translation of the lac structural genes. __________________ Indicate whether the statement is true or false.
Which of the following types of radioactive particle has the highest LET?
a) Alpha particle b) x-ray c) gamma-ray d) proton