5-Cell Structure

Question 1

Two types of electron microscope

Answer 1

TEM(transmission)

SEM(scanning)

Question 2

What is the cell membrane made up of

Answer 2

Phospholipids and protein

Question 3

Functions of cell membrane

Answer 3

Separate cell organelles and cytoplasm from outside
Controls what enters and leaves
Give support
Recognise molecules that touch them

Question 4

Nucleus

Answer 4

Control centre of cell

Question 5

Nuclear pores

Answer 5

Control entry and exit of molecules in and out of nucleus

Allow messenger rna

Question 6

DNA

Answer 6

Found in structures called chromosomes
Humans have 46
Genes located on chromosomes

Question 7

Nucleolus

Answer 7

Makes ribosomes

Question 8

Cytoplasm

Answer 8

Liquid that surrounds nucleus
Organelles suspended in cytoplasm
Most reactions take place in cytoplasm

Question 9

Protoplasm

Answer 9

Cytoplasm and nucleus

Question 10

Mitochondria

Answer 10

Supply energy
Site of respiration
Cells with lots of mitochondria produce lots of energy e.g. Liver
Cells with little mitochondria produce less energy e.g. Fat

Question 11

Ribosomes

Answer 11

Made of rna and protein

Function:make proteins

Question 12

Chloroplasts

Answer 12

Contain chlorophyll

Function:photosynthesis

Question 13

Cell wall

Answer 13

Made of cellulose
Gives plants shape
Permeable
Supports and strengthens

Question 14

Vacuoles

Answer 14

Membrane bound sacs within cytoplasm

Structure,storage,waste disposal,protection,growth

Question 15

Eukaryotes

Answer 15

Membrane enclosed nucleus and organelles eg mitochondria

Eg plant and animal cells

Question 16

Prokaryotes

Answer 16

Do not have nucleus or membrane enclosed organelles eg bacteria