题目内容

The product of replication is ( )

A. RNA
B. DNA
C. protein
D. dNTP

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Which can carry one carbon unit in living organism?()

A. vitamine B12
B. folic acid
C. tetrahydrofolate
D. biotin

Which one is the essential amino acid?

A．glycine
B．methionine
C．tyrosine
D．Glutamine

1．Which is not one carbon unit?

A．=CH－
B．－CH2－
C．―CH3
D．CO2

2．Which deamination is the main form in living organism?

A．transamination
B．oxidative deamination
C．coupled deamination
D．direct deamination