proteins

Question 1

what is protein needed for?

Answer 1

Growth and repair of the body cells

Question 2

what can excess protein be used for? and what is it called

Answer 2

energy, secondary of energy

Question 3

name the chemical elements found in protein

Answer 3

CHON 
carbon 
hydrogen 
oxygen 
nitrogen

Question 4

what do the chemicals do?

Answer 4

they arrange into molecules which are the building blocks of protein

Question 5

what are these called?

Answer 5

amino acids

Question 6

how many amino acids are there?

Answer 6

20-22

Question 7

sources of the amino acids

Answer 7

10 essential for children

8 essential for adults

Question 8

proteins with all essential 10 amino acids are called?

Answer 8

HBV- high biological value

Question 9

proteins that have one or more missing are called?

Answer 9

LBV- low biological value

Question 10

examples of HBV ( mainly found in animals foods)

Answer 10

• meat
• fish
• eggs
• cheese
• milk

Question 11

examples of LBV ( daily found in plant foods)

Answer 11

• cerals
• nuts
• paluses
• all vegetables

Question 12

when proteins are heated, their chemical structure is changed or it?

Answer 12

denatures

Question 13

as heating continues what happens to the proteins ?

Answer 13

they coagulate and become less soluble

Question 14

over cooked protein shrinks and coagulates tightly squeezing out water. What is this called?

Answer 14

syneresis

Question 15

what is denaturation caused by?

Answer 15

heat
acids
air bubbles

Question 16

explain how coagulation is done

Answer 16

they knock into each other protein molecules and start to join together in large groups.
As they coagulate the protein molecules trap and hold water from the molecules