Section A

Question 1

During anaerobic respiration in animals. The pyruvic acid is converted to?

Answer 1

Lactic acid

Question 2

What metabolic waste is excreted by the lungs

Answer 2

Carbon dioxide

Question 3

The passages that represent air movement in the lungs

Answer 3

Trachea-bronchiole-bronchus-alveolus

Question 4

The blood vessel that transports absorbed nutrients from the small intestine to the liver is the?

Answer 4

Hepatic portal vein

Question 5

The gas released during photosynthesis is ?

Answer 5

Oxygen

Question 6

The main organelle that is involved in cellular respiration?

Answer 6

Mitochondrion

Question 7

During glycolysis, the glucose molecule is broken down to form

Answer 7

Pyruvic acid, atp and energised hydrogen ions

Question 8

The gas released during Krebs cycle is?

Answer 8

Carbon dioxide

Question 9

The tissue lining the inner walls of an alveolus is

Answer 9

Squamous epithelium

Question 10

The part of the brain that controls the rate of heartbeat and breathing rate is?

Answer 10

Medulla oblongata

Question 11

The hormone that stimulates conversion glycogen into glucose is

Answer 11

Glucagon

Question 12

The end product of protein digestion is

Answer 12

Amino acids

Question 13

The site of chemical reactions of the dark phase is the

Answer 13

Stroma

Question 14

The function of haemoglobim

Answer 14

•transport of oxygen
• transport of CO2

Question 15

Ingestion

Answer 15

Intake of food

Question 16

Digestion

Answer 16

Physical and chemical breakdown of food into its simplest form

Question 17

Absorption

Answer 17

The products of digestion diffuse into the bloodstream

Question 18

Egestion

Answer 18

The removal of undigested and unabsorbed waste from the body through the annus in the form of faeces

Question 19

The reason for boiling the leaf in alcohol during a starch test is to

Answer 19

Breaking cell walls making cells more permeable

Question 20

The breakdown of a water molecule into hydrogen and oxygen atoms during photosynthesis

Answer 20

Photolysis

Question 21

Breathing muscle responsible for raising the rib cage during inhalation

Answer 21

Intercostal muscle

Question 22

Gas required for aerobic respiration

Answer 22

Oxygen

Question 23

Protective double membrane enclosing the lungs

Answer 23

Pleural / membrane

Question 24

Structures in the lung where gaseous exchange occur

Answer 24

Alveolus

Question 25

HormoneS) responsible for osmoregulation

Answer 25

Aldosterone
Antidiuretic hormone