What inorganic precursors are needed to synthesize proteins?
A) carbon, water, and oxygen
B) carbon, water, oxygen, and phosphate
C) carbon, water, oxygen, nitrogen, and phosphate
D) carbon, water, oxygen, nitrogen, and sulfur
E) carbon, water, oxygen, sodium, and phosphate
Answer: D
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Water molecules are attracted to each other due to the opposite charges created by partial charge separations within the molecules. These attractions are called:
A. peptide bonds. B. covalent bonds. C. ionic bonds. D. hydrogen bonds. E. double bonds.
The diameter of a blood vessel will be reduced by the contraction of ________
a. cardiac muscle b. smooth and cardiac muscles c. skeletal and cardiac muscles d. smooth muscle e. skeletal muscle
Enhances the transport of lipophilic signals in the blood
a. Adenylate cyclase b. G-protein c. Carrier protein d. cAMP e. Ion channel receptor protein
Insects that lay eggs on living hosts are called
A. endoparasites. B. brood parasites. C. ectoparasites. D. parasitoids. E. predators.