proteins

Question 1

chemicals that make up proteins

Answer 1

Carbon, Hydrogen, Oxygen and Nitrogen

Question 2

food sources of proteins : HBV and LBV

Answer 2

HBV: red meat, eggs and soya bean
LBV: almonds, barley and dhal

Question 3

4 functions of proteins in the body

Answer 3

1. Growth and repair: supports growth and repairs worn out cells
2. Provides structure: important component in skin, nails and tendons. provides structure and internal support to body.
3. Transportation: protein in haemoglobin form transports gases, wastes and nutrients from one tissue to another.
4. Energy reserve: when insufficient carb and fats are present, protein will give body energy.

Question 4

define essential amino acids and non essential amino acids + give examples

Answer 4

Essential amino acids: There are 9 essential amino acids that cannot be produced from the human body and must be obtained from consuming food. Eg. Isoleucine, Leucine and Valine.

Non essential amino acids: There are 11 non essential amino acids that can be produced from the body and need not be obtained from consuming food. Eg. Proline, Serine and Tyrosine.

Question 5

define HBV, LBV and complementary proteins + give examples

Answer 5

HBV: They are complete proteins whereby they supply all the essential amino acids needed for the human body in the right amounts. Eg. Red meat, Tilapia, Soya bean

LBV: They are incomplete proteins whereby they lack 1/ more essential amino acids required for the human body. Eg. Almond, Barley, Dhal

Complementary proteins: Obtained from consuming 2/more LBV proteins tgt so that the human body will obtain all the essential amino acids required for the human body. Eg. Baked beans + Bread