Enzyme and digestive system

Question 1

What is the primary role of the stomach in the digestive system?

Answer 1

The stomach turns food to break it into smaller pieces and digest proteins with enzymes like pepsin

Question 2

What type of tissue lines the stomach?

Answer 2

Epithelial tissue

Question 3

What are the main components of the human digestive system?

Answer 3

Alimentary canal and accessory organs

Question 4

Fill in the blank: The _______ is the channel through which food flows from the mouth to the anus.

Answer 4

alimentary canal

Question 5

What is the function of accessory organs in digestion?

Answer 5

They produce substances needed for digestion, such as enzymes and bile

Question 6

What is the first section of the small intestine called?

Answer 6

Duodenum

Question 7

What is the role of the pancreas in digestion?

Answer 7

Produces digestive enzymes and secretes them into the duodenum

Question 8

True or False: The large intestine is primarily responsible for absorbing nutrients.

Answer 8

False

Question 9

What is the purpose of bile in digestion?

Answer 9

Emulsifies fat and neutralizes stomach acid

Question 10

Fill in the blank: The _______ is responsible for synthesizing vitamin K and breaking down substances we cannot digest.

Answer 10

gut microbiota

Question 11

What are the three main types of digestive enzymes?

Answer 11

• Carbohydrases
• Proteases
• Lipases

Question 12

What does amylase break down?

Answer 12

Starch into maltose

Question 13

What is the lock and key model in relation to enzymes?

Answer 13

It describes how substrates fit into the active site of an enzyme

Question 14

What happens to enzymes at temperatures above their optimum?

Answer 14

They begin to denature and lose their shape

Question 15

What is denaturation in enzymes?

Answer 15

The process where an enzyme loses its specific shape and functionality

Question 16

Fill in the blank: Enzymes work fastest at their _______ temperature.

Answer 16

optimum

Question 17

What is the effect of pH on enzyme activity?

Answer 17

Extreme pH levels can denature enzymes, altering their active sites

Question 18

What does the enzyme catalase break down?

Answer 18

Hydrogen peroxide

Question 19

What is the aim of the enzyme required practical involving amylase?

Answer 19

To investigate the effect of pH on the rate of reaction of amylase

Question 20

What are the products of digestion used for?

Answer 20

• Building new carbohydrates
• Building new lipids
• Building new proteins

Question 21

What is the role of amylase in digestion?

Answer 21

To breakdown starch into maltose

Question 22

What color change indicates the presence of starch in food tests?

Answer 22

Blue-black with iodine solution

Question 23

What is the function of proteases in the digestive system?

Answer 23

To break down proteins into amino acids

Question 24

Fill in the blank: Lipase enzymes break down lipids into _______ and fatty acids.

Answer 24

glycerol

Question 25

What is the importance of temperature in enzyme activity?

Answer 25

Increased temperature increases enzyme activity up to the optimum, beyond which denaturation occurs

Question 26

What is the optimum pH for most enzymes?

Answer 26

7, but varies for enzymes in different environments

Question 27

What process do bacteria in the large intestine primarily assist with?

Answer 27

Breaking down substances that cannot be digested

Question 28

True or False: Enzymes are consumed in the reactions they catalyze.

Answer 28

False