Lactate dehydrogenase isoenzymes are composed of H and M subunits( )
A. dimer
B. trimer
C. tetramer
D. pentamer
E. hexamer
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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
the sequence of arrange of cytochrome in respiratory chain is ( )
A. b→c→c1→aa3→O2
B. c→b→c1→aa3→O2
C. c1→c→b→aa3→O2
D. b→c1→c→aa3→O2
E. c→c1→b→aa3→O2
in the following substance, which substance is uncoupler ( )
A. CO
B. 2,4-dinitronphenol(DNP)
C. rotenone
D. cyanide (CN)
E. H2S
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