Which one is correct about DNA denaturation? ()
A. hydrogen bond between the complementary base pair cleavage
B. the sequence of basic group is destroyed
C. DNA denaturation is irreversible
D. character of light absorption disappear
E. A260 is decreased
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Which is the secondary structure of DNA? ()
A. α-helix
B. β-folding
C. supercoil
D. β-turn
E. double helix structure
The kinetic property of uncompetitive inhibition is: ()
A. Km is increased,Vmax is unchanged
B. Km is unchanged,Vmax is unchanged
C. Km is decreased,Vmax is decreased
D. Km is unchanged,Vmax is decreased
E. Km is increased,Vmax is decreased
Isoenzymes are enzymes that: ()
A. catalyze the same reaction
B. have the same structure
C. have the same physiocochemical properties
D. have the same immunological properties
E. show the same electrophoretic mobility
Which of following decreases the degree of inhibition by increasing substrate concentration? ()
A. irreversible inhibition
B. competitive inhibition
C. noncompetitive inhibition
D. uncompetitive inhibition
E. not unknown
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