Biochemistry
Enzyme Structure And Functioning
Compiled By Simon Mwangi
Edition: 2024/25
, Science | Biochemistry I of VI pages
1. What are enzymes?
Biological catalyst that lowers the activation energy
2. What kind of proteins are most enzymes?
Globular
3. What are all metabolic processes catalysed by?
Enzymes
4. Are enzymes specific catalysts?
Yes
5. What is the substrate?
The molecule or atom that an enzyme acts on
6. What is substrate transformed into?
Product
7. Why are biocatalysts better than inorganic catalysts?
More effectiveGreater specificity (avoids side products)Milder reaction conditionsHigher reaction rate
8. Can active sites of enzymes recognise stereoisomers?
Yes
9. What do proteolytic enzymes do?
Catalyse the hydrolysis of peptides and also the hydrolysis of an ester bond
10. Do different enzymes have different degrees of specificity?
Yes they do
11. What are cofactors?
Small molecules that some enzymes require for activity
12. Two main classes of cofactors
Coenzymes (organic molecule derived from vitamin) Metals
13. What are tightly bound coenzymes called?
Prosthetic group
14. What are holoenzymes?
Enzymes with its cofactor
15. What are apoenzymes?
Enzymes without its cofactor
16. Are there any disorders and deceases that are caused by deficiency of one enzyme or excessive activity of
Yes both
Biochemistry 2024/25 Edition
Enzyme Structure And Functioning
Compiled By Simon Mwangi
Edition: 2024/25
, Science | Biochemistry I of VI pages
1. What are enzymes?
Biological catalyst that lowers the activation energy
2. What kind of proteins are most enzymes?
Globular
3. What are all metabolic processes catalysed by?
Enzymes
4. Are enzymes specific catalysts?
Yes
5. What is the substrate?
The molecule or atom that an enzyme acts on
6. What is substrate transformed into?
Product
7. Why are biocatalysts better than inorganic catalysts?
More effectiveGreater specificity (avoids side products)Milder reaction conditionsHigher reaction rate
8. Can active sites of enzymes recognise stereoisomers?
Yes
9. What do proteolytic enzymes do?
Catalyse the hydrolysis of peptides and also the hydrolysis of an ester bond
10. Do different enzymes have different degrees of specificity?
Yes they do
11. What are cofactors?
Small molecules that some enzymes require for activity
12. Two main classes of cofactors
Coenzymes (organic molecule derived from vitamin) Metals
13. What are tightly bound coenzymes called?
Prosthetic group
14. What are holoenzymes?
Enzymes with its cofactor
15. What are apoenzymes?
Enzymes without its cofactor
16. Are there any disorders and deceases that are caused by deficiency of one enzyme or excessive activity of
Yes both
Biochemistry 2024/25 Edition
