Biology
- Enzyme
In our digestive tract, we can find digestive enzymes that help us break down macromolecules. Enzymes are protein molecules (most of them) that function as biological catalysts. The function of these protein molecules is to increase the rate of a reaction...
- #18. Enzymes - Active Site, Activation Energy, Enzyme Specificity
Enzymes are globular proteins that serve as biological catalysts. They speed up or slow down metabolic reaction, but remain unchanged. They may facilitate the breaking of an existing bond or the formation of a new bond....
- #17.2 Enzymes - Syllabus 2016
3.1 Mode of action of enzymes 3.2 Factors that affect enzyme action Enzymes are essential for life to exist. Their mode of action and the factors that affect their activity are explored in this section. Prior...
- #17.1 Enzymes - Syllabus 2015
? Mode of action of enzymes ? Factors that affect enzyme action Learning Outcomes Candidates should be able to: (a) explain that enzymes are globular proteins that catalyse metabolic reactions; (b) explain the mode of action of enzymes in terms of...
- Comparison Between Hormones And Vitamins
Hormones and vitamins: Major differences Hormone Vitamin 1. Synthesized in endocrine glands and some by neurosecretory cells. Taken along with food from outside. 2. These are steroids...
Biology
Comparison between Enzymes and Hormones
Enzymes and Hormones: Major differences
| Enzymes | Hormones |
| 1. All enzymes are proteins | They may be proteins, amines or steroids |
| 2. They are macromolecules with higher molecular weight | They have only low molecular weight |
| 3. They are non-diffusible through cell membrane | They are diffusible through cell membrane |
| 4. They either act intracellularly or carried by some ducts to another site | Generally carried by blood to a target organ |
| 5. Always act as biological catalysts and increases the rate of metabolic physiological processes. | They may be either excitatory or inhibitory in their action |
| 6. They catalyze reversible reactions | Hormone controlled reactions are not reversible |
| 7. Reaction rate increases with increase in their concentration up to a limit. | Deficiency or overproduction of hormone causes metabolic disorders or diseases. |
| 8. They act quickly | Some hormones are quick acting, while some are slow acting with a lag period. |
| 9. They are not used in metabolic functions | They are used up in metabolic functions. |
- Enzyme
In our digestive tract, we can find digestive enzymes that help us break down macromolecules. Enzymes are protein molecules (most of them) that function as biological catalysts. The function of these protein molecules is to increase the rate of a reaction...
- #18. Enzymes - Active Site, Activation Energy, Enzyme Specificity
Enzymes are globular proteins that serve as biological catalysts. They speed up or slow down metabolic reaction, but remain unchanged. They may facilitate the breaking of an existing bond or the formation of a new bond....
- #17.2 Enzymes - Syllabus 2016
3.1 Mode of action of enzymes 3.2 Factors that affect enzyme action Enzymes are essential for life to exist. Their mode of action and the factors that affect their activity are explored in this section. Prior...
- #17.1 Enzymes - Syllabus 2015
? Mode of action of enzymes ? Factors that affect enzyme action Learning Outcomes Candidates should be able to: (a) explain that enzymes are globular proteins that catalyse metabolic reactions; (b) explain the mode of action of enzymes in terms of...
- Comparison Between Hormones And Vitamins
Hormones and vitamins: Major differences Hormone Vitamin 1. Synthesized in endocrine glands and some by neurosecretory cells. Taken along with food from outside. 2. These are steroids...