A common reducing agent used to couple chemical reactions in cells is ________.
A. niacin
B. FAD
C. riboflavin
D. NADH
Answer: D
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The effective plasma concentration of a hormone is normally regulated by appropriate adjustments in the hormone's rate of
a. excretion b. binding to plasma proteins c. metabolic inactivation d. secretion e. binding with target-cell receptors
Which type of congenital heart defect most commonly affects children born with Down syndrome (trisomy 21)?
a. tetralogy of Fallot b. atrioventricular septal defect c. ventricular septal defect d. transposition of great vessels
Most of a cell's DNA is located in its:
A) Golgi apparatus. B) nucleus. C) lysosomes. D) ribosomes.
The erectile tissue found in the vaginal wall near opening is called the:
a. clitoris b. vestibular bulb c. corpus spongiosum d. labia minora