Digestive enzymes and the molecules they make

Question 1

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 6 min 30 °C: 4 min 40 °C: 8 min 50 °C: 10 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C

Question 2

Which enzyme is described here: breaks proteins down into amino acids?

• A. amylase (a carbohydrase)
• B. protease
• C. lipase

Question 3

Which organ makes bile?

• A. stomach
• B. pancreas
• C. gall bladder
• D. liver

Question 4

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 7 min 30 °C: 3 min 40 °C: 9 min 50 °C: 10 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C

Question 5

Which enzyme is described here: breaks fats down into fatty acids and glycerol?

• A. amylase (a carbohydrase)
• B. protease
• C. lipase

Question 6

Which organ makes bile?

• A. stomach
• B. gall bladder
• C. liver
• D. pancreas

Question 7

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 11 min 30 °C: 7 min 40 °C: 4 min 50 °C: 8 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C

Question 8

Which enzyme is described here: breaks fats down into fatty acids and glycerol?

• A. amylase (a carbohydrase)
• B. protease
• C. lipase

Question 9

Why must large food molecules such as starch be digested?

• A. They contain no energy
• B. They are poisonous
• C. They are too big to pass through the gut wall into the blood
• D. They taste bad

Question 10

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 6 min 30 °C: 2 min 40 °C: 8 min 50 °C: 10 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C

Question 11

Which enzyme is described here: works in the acidic stomach?

• A. amylase (a carbohydrase)
• B. protease
• C. lipase

Question 12

What does bile do in digestion?

• A. absorbs water
• B. breaks fat into small droplets and neutralises stomach acid
• C. turns starch into sugar
• D. digests protein into amino acids

Question 13

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 7 min 30 °C: 4 min 40 °C: 8 min 50 °C: 10 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C

Question 14

Which enzyme is described here: found in saliva?

• A. amylase (a carbohydrase)
• B. protease
• C. lipase

Question 15

Why must large food molecules such as starch be digested?

• A. They are poisonous
• B. They taste bad
• C. They are too big to pass through the gut wall into the blood
• D. They contain no energy

Question 16

Amylase was mixed with starch at different temperatures. Iodine was used to time how long the starch took to disappear: 20 °C: 7 min 30 °C: 2 min 40 °C: 6 min 50 °C: 9 min 60 °C: starch still present after 20 min At which temperature did amylase work fastest, in °C?

Answer °C