B2 Cells

Question 1

What are the organisms made up of many millions of cells called?

Answer 1

Multicellular organisms

Question 2

What are unicellular organisms?

Answer 2

Organisms made up of just a single cell

Question 3

What is magnifying?

Answer 3

Making very small things look bigger to see them.

Question 4

What is used to look at very small things?

Answer 4

Microscopes

Question 5

What are the parts of the microscope? (light microscope)

Answer 5

Eyepiece lens, objective lens, stage, light, coarse focus, fine focus and specimen

Question 6

What is the formula for working out the magnification from the microscope?

Answer 6

Magnification of eyepiece lens × Magnification of objective lens

Question 7

What are the things that are in a plant cell but not in an animal cell?

Answer 7

Vacuole, Chloroplasts and Cell wall

Question 8

What are the two things visible in the electron microscope and not in a light microscope?

Answer 8

Mitochondrion and Ribosomes

Question 9

Where are proteins made?

Answer 9

Ribosomes

Question 10

What are Mitochondria for?

Answer 10

Respiration

Question 11

Which part of the cell contains genetic information in chromosomes?

Answer 11

Nucleus

Question 12

Which part of the cell is full of cell sap and helps it to be rigid?

Answer 12

Vacuole

Question 13

Which part of the cell contains organelles for chemical reaction?

Answer 13

Cytoplasm

Question 14

Which part of the cell contains receptor molecules?

Answer 14

Cell membrane

Question 15

What is a specimen?

Answer 15

The thing that is being looked at with a microscope

Question 16

What is the glass called where the specimen is placed?

Answer 16

Slide

Question 17

What is stain? And what is the purpose of it?

Answer 17

A liquid that helps to see cells easily and to see cell organelles more clearly as cells are colorless.

Question 18

What is the thin glass placed on top of a specimen?

Answer 18

coverslip

Question 19

What are 3 reasons of using a coverslip?

Answer 19

• To flatten the specimen
• To hold the specimen in place
• To stop the specimen drying out

Question 20

Which stain is used for the cell wall of bacteria?

Answer 20

crystal violet

Question 21

Which stain is used for animal cells?

Answer 21

Methylene blue

Question 22

Which stain is used for plant cells?

Answer 22

Iodine

Question 23

What are the difference between a bacterial cell and animal/plant cells?

Answer 23

They are much smaller and simpler
They do not have Nucleus

Question 24

What is binary fission? What are the 2 stages?

Answer 24

It is how bacteria reproduce
The 2 stages are
- Cell contents double
- Cell division by binary fission

Question 25

What are the things that are not in bacterial cell but in animal or plant cell?

Answer 25

Nucleus, Chloroplasts, Permanent vacuole and Mitochondria

Question 26

What are cells?

Answer 26

Basic unit of life

Question 27

What are Tissues?

Answer 27

group of similar cells working together

Question 28

What is an organ?

Answer 28

Is a group of tissues working together to do a job

Question 29

What is an organ system?

Answer 29

group of organs working together to do a job

Question 30

What is an organism?

Answer 30

group of organ systems working together to do a job

Question 31

What is the cell wall for bacterial cells made of?

Answer 31

Peptidoglycan

Question 32

What are the things that bacterial cells have but not plant or animal cell?

Answer 32

Circular DNA and plasmids

Question 33

What is the shape of the red blood cell? Why?

Answer 33

Bi-concave disc shape Because it increases surface area over which absorption of oxygen can occur

Question 34

What is Cilia?

Answer 34

It is the hair-like structure which moves mucus and traps particles

Question 35

What is the shape of the palisade cell?Why?

Answer 35

Column shaped to absorb a lot of sunlight and to fit lots in upper epidermis

Question 36

Why do root hair cells have thin walls?

Answer 36

So water moves through quickly

Question 37

What does the Acrosome in the head of the sperm contain? Why?

Answer 37

Digestive enzymes to penetrate an egg