24th of September

Question 1

what are carbohydrates

Answer 1

molecules with C,O and H
ratio of H:O = 2:1
general formula Cx(H2O)y

Question 2

control in test for reducing sugar

Answer 2

Benedict’s solution and water

Question 3

proteins are digested to

Answer 3

amino acids

Question 4

function of calcium in plants

Answer 4

forms the middle lamella between cells

Question 5

liquid medium in the cell in which chemical reactions take place

Answer 5

H2O

Question 6

metabolic role of lipids

Answer 6

store/release energy

Question 7

suggest a reason why eating too much fast food could be bad for your health

Answer 7

can cause obesity/high blood pressure/high cholesterol/ deficiency of vitamins and/or minerals

Question 8

metabolic role of proteins

Answer 8

formation of enzymes

Question 9

name 3 products of the Krebs cycle and state the fate of these products

Answer 9

ATP - releases energy/H+ forms H2O
CO2 - released into atmosphere or used in photosynthesis
NADH - releases electrons or links e- to electron transport

Question 10

does temperature affect the preparation of ethanol using yeast and why

Answer 10

yes as temperature affects enzymes

Question 11

explain why the rate of gas production from yeast may level off

Answer 11

less sugar

yeast cells may be killed by alcohol produced