Life Processes and Cells

Question 1

Expand the term ‘MRS GREN’.

Answer 1

Movement, respiration, sensitivity, growth, reproduction, excretion and nutrition.

Question 2

List the parts of an animal cell.

Answer 2

Nucleus, cell membrane, cytoplasm, ribosomes and mitochondria.

Question 3

List the parts of a plant cell.

Answer 3

Nucleus, cell membrane, cytoplasm, ribosomes, mitochondria, cell wall, chloroplast and vacuole.

Question 4

What is the function of the nucleus in a cell?

Answer 4

It contains the DNA of the organism.

Question 5

What is the function of the cell membrane in a cell?

Answer 5

It controls what enters and exits the cell.

Question 6

What is the function of the cytoplasm in a cell?

Answer 6

It is the jelly-like fluid where the organelles are suspended. Lots of reactions take place in the cytoplasm.

Question 7

What is the function of the ribosomes in a cell?

Answer 7

To create proteins.

Question 8

What is the function of the mitochondria in a cell?

Answer 8

To make energy. It is the powerhouse of the cell.

Question 9

What is the function of the cell wall in a cell?

Answer 9

To give structure and support to the plant.

Question 10

What is the function of the vacuole in a cell?

Answer 10

To store food and water (sap).

Question 11

What is the function of the chloroplast in a cell?

Answer 11

This is where photosynthesis takes place.

Question 12

What is the function of the eyepiece lens in a microscope? What is its usual magnification?

Answer 12

This is the lens closest to your eye. It usually has a magnification of 10x.

Question 13

What is the function of an objective lens in a microscope?

Answer 13

There are three lenses of different strengths which can be used to magnify the image more clearly.

Question 14

What is the function of the stage in a microscope? What is the function of the clips?

Answer 14

This is the place where you put a microscope slide. Clips hold the slide in place.

Question 15

What is the function of the diaphragm in a microscope?

Answer 15

This controls the amount of light that goes onto the slide.

Question 16

What is the function of the base in a microscope?

Answer 16

This is very heavy to keep the microscope from falling over.

Question 17

What is the function of the arm in a microscope?

Answer 17

This holds the eyepiece lens above the stage.

Question 18

What is the function of the coarse focus knob in a microscope?

Answer 18

This is used to focus the image so that you can see it clearly.

Question 19

What is the function of the fine focus knob in a microscope?

Answer 19

This is used to focus the image so that it is very sharp and clear.

Question 20

List in size order cell organisation.

Answer 20

Muscle cell, muscle tissue, muscle, muscular system, organism.

Question 21

What is diffusion and where can it occur?

Answer 21

The movement of particles from a high concentration to a low concentration. Diffusion can occur in a liquid or gas.

Question 22

What is osmosis?

Answer 22

The movement of water from a high concentration to a low concentration through a partially permeable membrane.

Question 23

What is a partially permeable membrane?

Answer 23

A membrane that has small holes in it and only lets small water molecules move through it.