SB1

Question 1

How many sub-cellular structures does a plant cell have

Answer 1

8

Question 2

How many sub-cellular structures does a animal cell have

Answer 2

5

Question 3

How many sub-cellular structures does a bacteria cell have

Answer 3

5

Question 4

What does the nucleus do

Answer 4

Contains DNA that controls the cell

Question 5

What does cytoplasm do

Answer 5

It’s where chemical reactions happen

Question 6

What does the cell membrane do

Answer 6

Holds the cell together and controls what goes in and out

Question 7

What does mitochondria do

Answer 7

Where respiration happens

Transfers energy that the cell needs to work

Question 8

What doe ribosomes do

Answer 8

Where protein synthesis happens

Question 9

What does the cell wall do

Answer 9

Supports and strengthens cell

Question 10

What does the vacuole do

Answer 10

Contains cell sap

Holds nutrients and water

Question 11

What does chloroplast do

Answer 11

Where photosynthesis happens

Contains chlorophyll

Question 12

What are plasmid DNA

Answer 12

Small loops of extra DNA

Question 13

What does chromosomal DNA do

Answer 13

Controls cells activities

Question 14

What does the flagellum do

Answer 14

Helps cell to move

Question 15

What is a haploid cell

Answer 15

23 chromosomes

Question 16

What is a diploid cell

Answer 16

46 chromosomes

Question 17

Are these haploid or diploid:

• bacteria
• animal
• plant
• egg
• sperm

Answer 17

Neither 
Diploid 
Diploid 
Haploid 
Haploid

Question 18

Give and explain the role of a specialised cell

Not egg or sperm

Answer 18

Ciliated epithelial cell
Are to move substances
The cilia on top of the cell allow it to do this

Question 19

What is the equation for magnification

Answer 19

Image size
divided by
Actual size

I
Am

Question 20

What is the difference between a light and electron microscope

Answer 20

ELECTRON
higher magnification
Higher resolution
Fires electrons at object

LIGHT
Uses light to see object

Question 21

Define resolution

Answer 21

The smallest distance that two points can be seen as two points

Question 22

What are the units of measure

Answer 22

Millimeter.
Mm

Micrometer 
Y(upside down)m

Nanometer
Nm

Picometer
Pm

Question 23

What enzyme breaks down protein and into what

Answer 23

Protease into amino acids

Question 24

What enzyme breaks down fats and into what

Answer 24

Lipases into fatty acids

Question 25

What enzyme breaks down carbohydrates and into what

Answer 25

Amylase into maltose

Question 26

What is the test for carbohydrates

And how does it work

Answer 26

Iodine

Add iodine to sample

Starch ✅ goes from orange/brown to black

Starch ❌ stays orange/brown

Question 27

What is the test for sugar

And how does it work

Answer 27

Benedicts

Add benedict solution (blue) to sample
Place in water bath

Sugar✅ blue to brick red

Blue to green to yellow to orange to brick red

Sugar❌ stays blue

Question 28

What is the test for fats

And how does it work

Answer 28

Ethanol

Put ethanol in sample ,shake , until dissolved then pour in water

Lipids✅they will precipitate our of the liquid as show a milky solution

Lipids❌ no change

Question 29

What is the test for proteins

And how does it work

Answer 29

Biuret Test

Add (blue) solution to sample

Protein✅ Turn purple

Protein❌ stay blue

Question 30

Define diffusion

Answer 30

Movement of particles from a high to low concentration

Question 31

Define osmosis

Answer 31

Movement of water from a high to low concentration through a semi permeable membrane

Question 32

Define active transport

Answer 32

Movement of particles low to high concentration through a membrane