A gene can best be defined as ________.
A) a three-base triplet that specifies a particular amino acid
B) noncoding segments of DNA up to 100,000 nucleotides long
C) a segment of DNA that carries the instructions for one polypeptide chain
D) an RNA messenger that codes for a particular polypeptide
C) a segment of DNA that carries the instructions for one polypeptide chain
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Why is swimming not the best exercise for prevention of osteoporosis?
A. no weight bearing B. water resistance is hard on the bones C. both A & B D. none of the above
The hips are ________, or inferior, to the shoulders.
A) caudal B) ventral C) superficial D) dorsal E) cranial
Norepinephrine is a catecholamine.
Answer the following statement true (T) or false (F)
A college student had a depressed mood and trouble falling asleep. Which chemical neurotransmitter could cause such problems?
A. Acetylcholine B. Epinephrine C. Endorphins D. Serotonin