1.1 Cells

Question 1

Draw and label an animal cell

Answer 1

Nucleus, cytoplasm, cell membrane, mitochondria

Question 2

Draw and label a plant cell

Answer 2

Nucleus, cytoplasm, cell membrane, mitochondria, chloroplasts, cell wall, vacuole

Question 3

Differentiation

Answer 3

When a cell becomes specialised

Question 4

The levels of organisation

Answer 4

1. Organelle
2. Cell
3. Tissue
4. Organ
5. Organ system
6. Organism

Question 5

Diffusion

Answer 5

The movement of gas and liquid particles from a high concentration to a low concentration. A passive process.

Question 6

Osmosis

Answer 6

The movement of water particles from an area of high water concentration to an are of low water concentration through a semi-permeable membrane.

Question 7

Active Transport

Answer 7

The movement of particles against a concentration gradient from an area of high concentration to an area of low concentration. Uses energy.

Question 8

What is an enzyme?

Answer 8

A protein which is a biological catalyst. It speeds up a reaction without taking part of it. It can break down or build food molecules.

Question 9

Lock and Key theory

Answer 9

The lock and key theory demonstrates how each enzyme is specific to a certain substrate like how each key is specific to a certain lock.

Question 10

Temperature on pH

Answer 10

An enzyme works best at it’s optimum temp. too low as the enzyme works slowly. Too high and the enzyme denatures and changes the shape of it’s active site.

Question 11

pH on Enzymes

Answer 11

Each enzyme works at it’s optimum pH. This is different for each enyme.