Cells

Question 1

What is a cell

Answer 1

The smallest building block of life

Question 2

What does MRS GREN stand for

Answer 2

movement, respiration, sensitivity, Growth, reproductivity, excretion, nutrition

Question 3

What are organelles

Answer 3

A small structure in a cell with a specific function

Question 4

What does cytoplasm do

Answer 4

Produces chemical reaction

Question 5

What does a nucleus do

Answer 5

Controls the activity of cells

Question 6

What does mitochondria do

Answer 6

Site of respiration

Question 7

What do ribosomes do

Answer 7

Site of protein

Question 8

What does the cell membrane do

Answer 8

Controls what leaves and enters a cell

Question 9

What does a cell wall do

Answer 9

Structures and supports the cell

Question 10

What do chloroplasts do

Answer 10

Site of photosynthesis

Question 11

What do vacuoles do

Answer 11

Ensures the cell wall is sturdy

Question 12

How do you work out total magnification

Answer 12

Eyepiece x Objective = Total magnification

Question 13

How do you work out Image size

Answer 13

Actual size x magnification = Image size

Question 14

What is a prokaryotic cell

Answer 14

A single celled organism with no nucleus

Question 15

What is a eukaryotic cell

Answer 15

Any cell that possesses a clearly defined nucleus

Question 16

What is a specialised cell

Answer 16

A cell that has been differentiated to perform a function

Question 17

How are muscles cells differentiated to perform their function

Answer 17

Have many mitochondria for more energy in respiration

Question 18

How are nerves cells differentiated to perform their function

Answer 18

Has myelin insulation to help transmission signals

Question 19

How are sperm cells differentiated to perform their function

Answer 19

Have a tail to allow the sperm to swim to the egg

Question 20

How is a xylem differentiated to perform there function

Answer 20

holes on either side to allow water to move sideways

Question 21

What is a chromosome and how many do humans have

Answer 21

46 chromosomes, Made up of protein and dna

Question 22

What is a stem cell

Answer 22

An undifferentiated cell that can produce specialised cells

Question 23

What is an adult stem cell

Answer 23

Found in bone marrow and can become either a red or white blood cell

Question 24

What is a plant stem cell

Answer 24

undifferentiated cells located in the meristems of plants

Question 25

What is diffusion

Answer 25

Movement of particles from a high concentration to a low concentration, down a gradient through a semi permeable membrame

Question 26

What are factors that can affect diffusion

Answer 26

Temperature, Surface area, Concentration and distance

Question 27

What is osmosis

Answer 27

Diffusion of water molecules from a dilute solution to a concentrated solution through a semipermeable membrane

Question 28

What does hyptonic mean

Answer 28

Low solute

Question 29

What does isotonic mean

Answer 29

Equal solute

Question 30

what does hypertonic mean

Answer 30

High solute

Question 31

What is active transport

Answer 31

partially permeable membrane moves particles from a low concentration to a higher concentration this is against the concentration gradient