Paper 1 Biology 2022

Question 1

Interphase

Answer 1

The DNA in chromosomes copies itself

Question 2

Prophase

Answer 2

The DNA in chromosomes become more visible

Question 3

Metaphase

Answer 3

Chromosomes line up in the middle of the cell.

Question 4

Anaphase

Answer 4

Chromosomes are pulled to different ends of the cell.

Question 5

Telophase

Answer 5

New membranes form around the chromosomes at each end of the cell.

Question 6

Cytokinesis

Answer 6

The cell membrane divides into two daughter cells.

Question 7

Cornea

Answer 7

Refracts light as it enters the eye

Question 8

Iris

Answer 8

Controls how much light enters the pupil

Question 9

Lens

Answer 9

Focuses light onto the retina

Question 10

Retina

Answer 10

Contains the light receptors (Rods and Cones)

Question 11

Optic nerve

Answer 11

Carries impulses between the eye and the brain

Question 12

Short Sighted and Cures

Answer 12

The eyeball is too long, distance between lens and retina is too long
Cure : Concave Lens and Laser Surgery

Question 13

Long Sighted and Cures

Answer 13

Eyeball is too short, distance between lens and retina is too short
Cure : Convex Lens and Laser Surgery

Question 14

Medulla Oblongata

Answer 14

Controls unconscious activities such as heart rate and breathing rate

Question 15

Cerebellum

Answer 15

Controls balance, movement and muscular activity.

Question 16

Hypothalamus

Answer 16

Controls body temperature and water balance in the body.

Question 17

Cerebral cortex

Answer 17

Controls thinking, speech, feeling and language

Question 18

How long is the Menstrual Cycle

Answer 18

28 days

Question 19

Male chromosomes

Answer 19

XY

Question 20

Female chromosomes

Answer 20

XX

Question 21

Gamete

Answer 21

Gamete is a sex cell

Question 22

Homozygous

Answer 22

Alleles are both identical for the same characteristic - AA

Question 23

Heterozygous

Answer 23

Alleles are both different for the same characteristic - Aa

Question 24

Selective Breeding Disadvantage

Answer 24

. Rare diseases can happen or be selected

. Physical problems

Question 25

Why do flower farmers use selective breeding

Answer 25

.Better resistance to diseases

. Harvest faster

Question 26

Why are animals used for selective breeding

Answer 26

. Can produce better meat

. Quicker to enter the food chain as they take less development

Question 27

Selective Breeding

Answer 27

When humans breed plants and animals to get they’re desired needs

Question 28

Genetic Modification

Answer 28

Transferring a piece of DNA from one organism to a different organism

Question 29

PH effect on enzyme activity

Answer 29

1. Heat water to 40 degrees Celsius
2. One drop of iodine solution in a tray
3. Measure 2cm cubed of amylase solution in a tube
4. Add 1cm cubed of a solution with a specific PH in a tube
5. Add 2cm cubed of starch solution to the tube
6. Every 20 secs take a small amount of mixture
7. Repeat with different PH solutions

Question 30

Biological specimens with a microscope

Answer 30

1. Collect a small specimen of cells
2. Add a drop of water to the centre of a microscope slide
3. Place specimen onto the drop of water
4. Use a toothpick to lower a coverslip onto the specimen
5. Draw one or more of the cells you see