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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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
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)