题目内容

which metabolic pathway provide the energy for mature red blood cells? ( )

A. aerobic oxidation of glucose
B. oxidation of fatty acids
C. anaerobic oxidation of glucose
D. PPP

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Which vitamine is essential for methionine cycle?()

A. biotin
B. vitamine B12
C. vitamine B2
D. pyridoxal

Which is not one carbon unit?()

A. -CH2-
B. -CH3
CO2

When V = 80% Vmax in the enzyme-catalyzed reaction,the [S] will be how many times of Km? ( )

A. 7
B. 6
C. 5
D. 4

3′terminus of most eukaryotic mRNA is ( )

A. poly U
B. poly G
C. poly A
D. poly C

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