Enzymes And Their Cofactors

Question 1

Cytochrome oxidase

Answer 1

Cu++, Fe++, Fe+++

Question 2

Catalase, peroxidase

Answer 2

Fe++/+++

Question 3

Pyruvate kinase

Answer 3

K+, Mg++

Question 4

Hexokinase, glucose-6-phosphatase

Answer 4

Mg++

Question 5

Arginase, ribonucleotide reductase

Answer 5

Mn++

Question 6

Dinitrogenase

Answer 6

Mo

Question 7

Urease

Answer 7

Ni++

Question 8

Carbonic anhydrase, alcohol dehydrogenase, carboxypeptidases A and B

Answer 8

Zn++

Question 9

Biocytin

Answer 9

• transfers CO2

- Biotin is dietary precursor

Question 10

CoA

Answer 10

• transfers acyl groups

- precursor is pantothenic acid

Question 11

Coenzyme B12

Answer 11

• transfers H atoms and alkyl groups

- precursor is B12

Question 12

Flavin adenine dinucleotide

Answer 12

• transfers electrons

- riboflavin is precursor

Question 13

Lipoate

Answer 13

• electrons and acyl groups

Question 14

Nicotinamide adenine dinucleotide

Answer 14

• transfers hydride ion (:H-)

- precursor is niacin

Question 15

Pyridoxal phosphate

Answer 15

• transfers amino groups

- precursor is B6

Question 16

Tetrahydrofolate

Answer 16

• transfers One-carbon groups

- precursor is folate

Question 17

Thiamine pyrophosphate

Answer 17

• transfers aldehydes

- thiamine is precursor

Question 18

Lipoamide

Answer 18

• transfers acyl group