Combined Biology - B2 Organisation

Question 1

Put the following in size order from smallest to largest:

organ, cell, organ system, tissue

Answer 1

cell → tissue → organ → organ system

Question 2

What is a tissue?

Answer 2

A group of cells with a similar structure and function.

Question 3

What is an organ?

Answer 3

Groups of tissues forming particular functions.

Question 4

What is the function of the digestive system?

Answer 4

To digest and absorb food

Question 5

What do enzymes do?

Answer 5

Catalyse (speed up) reactions

Question 6

Name the part of the enzyme indicated by the arrow

Answer 6

Active site

Question 7

Q. Where is amylase produced?

Answer 7

• In the salivary glands, small intestine and pancreas.

Question 8

Q. Where is protease produced?

Answer 8

• In the stomach, small intestine and pancreas

Question 9

Q. Where is lipase produced?

Answer 9

• Lipase is produced in the small intestine and pancreas

Question 10

What do digestive enzymes do?

Answer 10

Break down food into soluble molecules that can be absorbed into the bloodstream.

Question 11

Name the enzyme that is a type of carbohydrase.

Answer 11

Amylase

Question 12

Q. Where is bile made?

Q. Where is bile stored?

Q. What two things does bile do?

Answer 12

• Bile is made in the liver.
• Bile is stored in the gall bladder.
• 1) Bile is alkaline so neutralises hydrochloric acid from the stomach
• 2) It emulsifies fat to form small droplets which increases the surface area to increase the rate of fat breakdown.

Question 13

What is the test for glucose and what would a positive result show?

Answer 13

• Add Benedict’s solution
• Put in a water bath at 75 ^oC
• Turns from blue to orange (can turn green, yellow or red depending on amount of glucose present)

Question 14

What is the test for starch and what would a positive result show?

Answer 14

• Add iodine
• Turns from orange to black

Question 15

What is the test for protein and what would a positive result show?

Answer 15

• Add Biuret Solution
• Turns from blue to light purple

Question 16

Name the organs the food moves through in the digestive system in order from mouth to anus.

Answer 16

1. Mouth
2. Oespophagus
3. Stomach
4. Small intestine
5. Large intestine
6. Rectum
7. Anus

Question 17

Where in the body is most food digested?

Answer 17

Small intestine

Question 18

What are the folds in the small intestine called?

Answer 18

villi

Question 19

Q. Where does amylase work?

Answer 19

• In the mouth and small intestine.

Question 20

Q. What does amylase breakdown and what are the products?

Answer 20

• Amylase breaks down starch into sugar.

Question 21

Q. Where does protease work?

Answer 21

• Protease works in the stomach and small intestine

Question 22

Q. What does protease breakdown and what are the products?

Answer 22

• Protease breaks down protein into amino acids

Question 23

Q. Where does lipase work?

Q. What does lipase breakdown and what are the products?

Answer 23

• Lipase works in the small intestine

Question 24

Q. Where is lipase produced?

Q. Where does lipase work?

Q. What does lipase breakdown and what are the products?

Answer 24

• Lipase is produced in the small intestine and pancreas
• Lipase works in the small intestine
• Lipase breaks down lipids (fats) into fatty acids and glycerol.