Cells and transport

Question 1

How do you calculate total magnification

Answer 1

Eyepiece lens x objective lens

Question 2

Define the term resolution

Answer 2

Resolution is the ability to distinguish between two separate points in an image

Question 3

What is the role of the nucleus

Answer 3

Contains DNA in the form of chromosomes. Contains the genetic code.

Question 4

What is the role cytoplasm in a cells

Answer 4

This is where chemcial reactions take place

Question 5

What is the function of the cell membrane

Answer 5

Controls what enters and leaves the cells.

Question 6

What is function of the mitochondria is cellsw

Answer 6

This is the site of respiration.

Glucose + Oxyen –> Carbon dioxide + water vapour + ATP energy

Question 7

Define the word ‘magnification’

Answer 7

Magnification is how much bigger an image is compared to it’s actual size.
Can be calculated by using the IAM triange.

Question 8

Function of the cellulose cell wall

Answer 8

This is outer layer of plant cells. It is made of cellulose. It gives the plant strength and support.

Question 9

Why are ribosomes needed in a cell?

Answer 9

Ribosomes are the site (location) where proteins are made.

Question 10

What is the function of chloroplasts in plant cells?

Answer 10

Chloroplasts contain a green chemcial called chlorophyll. It traps sunlight energy which is needed for photosynthesis.

Question 11

What is the role of a vacuole in a plant cell

Answer 11

enclosed compartments that are filled with both inorganic and organic molecules, along with water to support the organelle.

Question 12

What are eukaryotic cells?

Answer 12

A eukaryote is any organism whose cells have a cell nucleus and other organelles enclosed within membranes.

Question 13

What is a prokaryotic cell?

Answer 13

Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures, they do not have a nucleus, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.

Question 14

What is a plasmid?

Answer 14

a genetic structure in a cell that can replicate independently of the chromosomes

Question 15

What is order of magnitude?

Answer 15

An estimate of size or magnitude expressed as a power of ten

Question 16

What is it called when a plant cell is put in a dilute solution?

Answer 16

It will fill up the cell by osmosis but the cell will not burst as it has a cell wall. This is called turgid

Question 17

What happens when an animal cell is put in a concentrated solution?

Answer 17

The water in the cell will leave by osmosis causing the sell to wrinkle the cell is crenated

Question 18

What is the role of a vacuole in a plant cell

Answer 18

enclosed compartments that are filled with both inorganic and organic molecules, along with water to support the organelle.

Question 19

What are eukaryotic cells?

Answer 19

A eukaryote is any organism whose cells have a cell nucleus and other organelles enclosed within membranes.

Question 20

What is meant by flaccid?

Answer 20

This is when a cell is a neutral solution and it is normal

Question 21

What is a plasmid?

Answer 21

a genetic structure in a cell that can replicate independently of the chromosomes

Question 22

What is order of magnitude?

Answer 22

An estimate of size or magnitude expressed as a power of ten

Question 23

What is meant by the term plasmolyzed?

Answer 23

This is when a plant cell is in a concentrated solution. Because of this water leaves the cell by osmosis and the cell becomes wrinkled

Question 24

What is osmosis?

Answer 24

Osmosis is the movement of water molecules from an area of low concentration to an area of low concentration through a partially permeable membrane

Question 25

What is diffusion?

Answer 25

Diffusion is the movement of particles from an area of high concentration to a low concentration

Question 26

What is a dilute solution?

Answer 26

A dilute solution is when water is added