The secondary structure of DNA is ( )
A. α-helix
B. Β-pleated sheet
C. Β-turn
D. supercoil
E. double helix
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the analogue of sulfonamides is ( )
A. FH4
B. FH2
C. para-amino –benzoic acid
D. folic acid
E. pyrimidine
Lactate dehydrogenase isoenzymes are composed of H and M subunits( )
A. dimer
B. trimer
C. tetramer
D. pentamer
E. hexamer
The most common type of chemical modification is ( )
A. Phosphorylation and dephosphorylation,
B. acetylation and deacetylation
C. methylation and demethylation
D. adenylation and deadenylation
E. -SH and –S-S interconversion
NADH existed in liver want to enter into the mitochondrion mainly through ( )
A. citrate – pyruvate cycle
B. carnitine shuttle
C. malate- aspartate shuttle
D. α-glycerophosphate shuttle
E. alanine-glucose cycle
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