section 2 structures and functions in living organsisms c & d

Question 1

chemical elements present in carbohydrates and lipids

Answer 1

carbon, hydrogen and oxygen

Question 2

chemical elements present in proteins

Answer 2

carbon, hydrogen, oxygen, sulphur, phosophurus, nitrogen

Question 3

test for glucose

Answer 3

Heat object with Benedict’s or Fehling’s Reagent.

if it turns from blue to orange then glucose is present.

Question 4

test for starch

Answer 4

add red iodine solution and see if it turns blue/black

Question 5

role of enzymes as biological catalysts in metabolic reactions

Answer 5

enzymes lower the activation energy therefore making it faster. they are also unchangedd from the beginning to the end so are a catalyst

Question 6

enzymes

Answer 6

are biological catalysts that control all the reactions in a cell they speed them up without being used up. Enzymes are protein. The shape of the protein wall makes up an active side if the actve sde is afected (heat ph) it can become de natured