MCQ
Cofactor (coenzyme) is a part of holoenzyme it is:
- ALoosely attached inorganic part.
- BAccessory non-protein substance attached firmly.
- CLoosely attached organic part.
- DNone of the above.
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Assertion $A:$ $ATP$ is used at two steps in glycolysis.
Reason $R:$ First $ATP$ is used in converting glucose into glucose$-6-$phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose$-1,6-$diphosphate.
In the light of the above statements, choose the correct answer from the options given below :