Mutations are changes in the nucleotide sequence of DNA that ____
a. do not occur in the germ cells
b. do not occur in the somatic cells
c. are always chemically induced
d. are always spontaneous
e. can be passed on to daughter cells
e
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The bones and cartilage in animals serve the same function as ________ in plants?
A. xylem B. leaves C. wood D. capillaries E. phloem
Which element is considered an essential macronutrient for plants?
a. oxygen b. boron c. lithium d. silicon
e. molybdenumIn noncompetitive feedback inhibition
a. the products of the reaction block the active site of the enzyme. b. the products of the reaction at the end of the pathway bind to a site other than the active site of an enzyme at or near the beginning of the pathway and block enzyme activity indirectly. c. the substrate and cofactors compete for the active site. d. the inhibitor binds to and directly blocks the active site of the enzyme. e. enzyme activity is controlled by the reversible binding of a regulatory molecule.
HIV appears to have developed from a(n) ________
Fill in the blank(s) with correct word