Instinctive behavior is
a. an innate response
b. a fixed action pattern
c. not altered by experience
d. triggered by a specific stimulus
e. all of these.
Answer: e
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In a nucleosome, the DNA is wrapped around _____
A) polymerase molecules B) ribosomes C) histones D) a thymine dimer E) satellite DNA
PFK-1 is _________ by ATP and _________ by ADP
A. activated; activated B. activated; inhibited C. inhibited; activated D. inhibited; inhibited
Melatonin is a hormone made by the pineal gland. People take melatonin to treat sleep disorders as it is known to function in training the circadian rhythm in humans. Chemically, it is a hydroxylated, decarboxylated, acetylated and methylated tryptophan molecule. To which class of hormones would it belong?
a. lipid-derived b. peptide c. amino acid-derived d. glycoprotein
Base substitutions of the (first/second/third) base of a codon frequently produce silent mutations.
Fill in the blank(s) with the appropriate word(s).