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
查看答案
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