Compounds and Nutrients

Level: Grade 12
1. What process is required for proteins to be broken down into amino acids?

2. What label is given to the protein part of the enzyme-co-enzyme complex?

3. It is important to have Vitamin K in the diet as it is essential to?
forming enzymes
promoting metabolism
improving night vision
clotting of blood
4. Choose two characteristics that are related to enzymes.
contain hydrogen
contain nitrogen
very sensitive to light
very sensitive to pH
5. What kind of protein forms when three amino acids link together

6. Tick the statements that are true.
Lipids form when fatty acids and glyceros combine.
The ratio of H:O in lipids is different compared with that of water.
Lipids may have phosphorous as an additional element.
Lipids comprise the elements C, H, and O.
7. Tick the statements that are true in respect of enzymes.
each enzyme has a particular shape
the enzyme reacts with the substrate once only
each enzyme has a substrate which fits into it
the substrate remains unchanged after the chemical reaction
8. The deficiency of certain elements leads to the yellowing of leaves. Which of the following elements have such an effect?
Nitrogen
Phosphorous
Magnesium
Calcium
9. Wheat germ oil and spinach are rich sources of?
Vitamin E
Vitamin D
Vitamin B
10. Proteins are essential components of pr------- and of ch----------

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