b3- organisation and the digestive system

Question 1

what is a tissue?

Answer 1

a group of cells with similar structure and function

Question 2

what is an organ?

Answer 2

a collection of tissues performing specific functions

Question 3

what is an organ system?

Answer 3

a group of organs that perform specific functions on the body

Question 4

what are carbohydrates made up of?

Answer 4

units of sugar

Question 5

what are protein molecules made up of?

Answer 5

chains of amino acids

Question 6

what do catalysts do?

Answer 6

increase the rate of chemical reactions without chemically changing

Question 7

what are enzymes?

Answer 7

biological catalysts, they catalyse specific reactions in living organisms due to the shape of their active site. this is the lock and key theory of enzyme action

Question 8

what are enzymes made up of?

Answer 8

Proteins
The amino acid chains are folded to form the active site, which matches the shape of a specific substrate molecule

Question 9

what is metabolism?

Answer 9

the sun of all reactions in a cell or body

Question 10

what affects enzyme activity?

Answer 10

temperature and ph

Question 11

what does high temperature do to an enzyme?

Answer 11

denature it changing the shape of the active site