B1 - Cell Biology

Question 1

Function of Nucleus?

Answer 1

Contains genetic material and controls all activities of cell.

Question 2

Function of Cytoplasm?

Answer 2

Chemical reactions

Question 3

Function of Cell Membrane?

Answer 3

Controls what goes in and out of the cell

Question 4

Function of Mitochondria?

Answer 4

Aerobic Respiration takes place

Question 5

Ribosomes?

Answer 5

The protiens of the cell

Question 6

Rigid cell wall (only plant cell) ?

Answer 6

Made of cellulose, It supports and strengthens the cell

Question 7

Permanent Vacuole (only plant cell) ?

Answer 7

contains cell sap

Question 8

Chloroplasts (only plant cell)?

Answer 8

where photosynthesis occurs

Question 9

What do bacteria cells contain instead of nucleus’?

Answer 9

Plasmids

Question 10

Formula for Magnification?

Answer 10

Question 11

Which gives a higher resolution? A light or electron microscope?

Answer 11

Electron microscopes, as well as a higher maginification.

Question 12

What is differentiation?

Answer 12

The process by which a cell changes to become specialised for it’s job.

Question 13

What are adaptations of the sperm cell which makes it specialised?

Answer 13

Long tail and streamlined head to help it swim to the egg.

Alot of mitochondria to provide energy needed.

It carries enzymes to digest through the egg’s cell membrane.

Question 14

Why do multicellular organisms use mitosis?

Answer 14

To grow or replace cells

Question 15

What is diffusion?

Answer 15

The spreading out of particles from a higher concentration to a lower concentration.

Question 16

What is Osmosis?

Answer 16

The movement of water molecules across a partially permeable membrane from a region of higher water concentration to a lower water concentration.

Question 17

What is Active Transport?

Answer 17

Movement of ions or molecules from a lower concentration to a higher concentration.

Question 18

In neurones (nerve cells) what prevents electrical impules to leak out?

Answer 18

Myelin Sheath

Question 19

In the nerve cells, what increases the distance of the impulse?

Answer 19

The long axon.

Question 20

In the neurones (nerve cells) what transfers to electrical impulses to other parts of the body?

Answer 20

Dendrites.

Question 21

What is the function of xylem cells?

Answer 21

To transport water up the stem of the plant into the leaves.

Question 22

Give two adaptations of the root hair cell.

Answer 22

Long projections = increase surface area for absorption of water and minerals.

No chloroplasts = located underground.

Question 23

What is the function of phloem?

Answer 23

Transport food products to parts of the plant where needed.

Question 24

What organisms are eukaryotes?

Answer 24

Animal and plant

Question 25

What organisms are prokaryotes?

Answer 25

Bacteria.