First Test

Question 1

Advantages of using an electron microscope

Answer 1

Higher magnifications and resolution

Question 2

What is the role of the nucleus

Answer 2

Controls the cell and it’s activities

Question 3

Role of the cell membrane

Answer 3

Controls what enters and leaves the cell

Question 4

Role of the mitochondria

Answer 4

Where aerobic respiration occurs

Question 5

Role of the vacuole

Answer 5

Stores cell sap keeping the cell firm and rigid

Question 6

Cell wall

Answer 6

Supports and protects the cell

Question 7

What is the role of chloroplast

Answer 7

Contains chlorophyll which traps energy transferred from the sun

Question 8

What is the role of ribosomes

Answer 8

Makes new proteins

Question 9

What is the order of measurements

Answer 9

Nm, um, mm, m, km

Question 10

How do you calculate magnification

Answer 10

Image size/ object size

Question 11

What is diffusion

Answer 11

When particles move from an area of high concentration to an area of low concentration

Question 12

If something doesn’t require energy it is called

Answer 12

Passive

Question 13

Are diffusion, osmosis and active transport passive

Answer 13

Diffusion and osmosis is but active transport isn’t as it requires energy

Question 14

What is osmosis

Answer 14

The diffusion of water molecules from an area of high concentration to an area of low concentration

Question 15

What is active transport

Answer 15

The movement of substances from an are of low concentration to high. During active transport carriers in the cell membrane get particles and move them against the concentration gradient.

Question 16

What are the 3 main types of digestive enzymes

Answer 16

Carbohydrase, protease and lipase

Question 17

What does carbohydrase do

Answer 17

Break carbohydrates into smaller sugar

Question 18

What does protease do

Answer 18

Break protein into amino acids

Question 19

What does lipase do

Answer 19

Break fat into fatty acids and glycerol

Question 20

What are proteins made up of and what do they break down into

Answer 20

They are made up of amino acids and break down into smaller peptides and individual amino acids

Question 21

What can amino acids be used for

Answer 21

Growth and repair

Question 22

What does amylase do

Answer 22

Break down starch into smaller molecules (maltose). Maltose cab be converted into glucose by another enzyme Maltese in the small intestine

Question 23

What are enzymes

Answer 23

Biological catalysts that speed up the reaction time without being used yo in the reaction

Question 24

How do you calculate the percentage change in mass

Answer 24

(Final mass- initial mass) ÷ initial mass x 100