A layer of membrane attached to a virus is called
an envelope.
a protein coat.
a chromosome.
a plasmid.
a nucleus
an envelope.
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An organelle found in plant cells and some members of the kingdom Protista but not in animal cells is a
A. chloroplast. B. lysosome. C. Golgi apparatus. D. rough endoplasmic reticulum. E. mitochondrion.
Bacitracin ________.
A. inhibits peptidoglycan synthesis B. interferes with protein synthesis C. interferes with plasma membrane function D. inhibits DNA replication
Epinephrine
A. is an antihistamine. B. causes desensitization. C. inhibits the activity of lymphocytes. D. reverses constriction of airways.
Allosteric enzyme regulation is usually associated with _____
A) feedback inhibition B) activating activity C) an enzyme with more than one subunit D) the need for cofactors