When V = 80% Vmax in the enzyme-catalyzed reaction,the [S] will be how many times of Km? ( )
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3′terminus of most eukaryotic mRNA is ( )
A. poly U
B. poly G
C. poly A
D. poly C
Okazaki fragment is ( )
A. the DNA segment in DNA template strand
B. the DNA segment synthesized on lagging strand
Okazaki fragment is ( )
A. the DNA segment in DNA template strand
B. the DNA segment synthesized on lagging strand
C. the DNA segment synthesized on leading strand
D. the RNA segment synthesized by primase
Whichone is the essential amino acid?()
A. glycine
B. methionine
C. tyrosine
D. Glutamine