cell structure and organisation

Question 1

Describe the function of nucleus

Answer 1

gene expression, protein synthesis and stores DNA

Question 2

Describe the function of ribosomes

Answer 2

protein synthesis

Question 3

Describe the function of RER

Answer 3

Covered in ribosomes for protein synthesis and transport.

Question 4

Describe the function of SER

Answer 4

Lipid synthesis and transport

Question 5

Describe the function of mitochondria

Answer 5

Aerobic respiration for energy fibres

Question 6

Describe the function of the golgi body

Answer 6

Modifies and packages proteins

Question 7

Describe the function of lysosomes

Answer 7

Digests invading, unwanted and old parts of the cell

Question 8

Describe the function of chloroplasts

Answer 8

Thylakoids contain chlorophyll for photosynthesis

Question 9

Describe the function of a vacuole

Answer 9

Store sugars and amino acids and bounded by a single membrane

Question 10

What makes a cell prokaryotic?

Answer 10

no membrane bound cell organelles

Question 11

List differences between prokaryotic and eukaryotic cells

Answer 11

Prokaryotes: dna free in cytoplams, 70s ribosomes, peptidoglycan cell wall
Eukaryotes: dna in nucleus, 80s ribosomes, cellulose cell wall

Question 12

Describe the function of a virus

Answer 12

Injects it’s genetic material into a living cell which then creates more virus particles

Question 13

Name the parts of a virus

Answer 13

• Nucleic acids inside DNA or RNA
• Caspid, a protein coat

Question 14

Define a tissue

Answer 14

A group of cells with the same structure and function working together

Question 15

Describe an epithelial tissue

Answer 15

Continuous layers of cells on internal and external surfaces

Question 16

Describe a cubiod tissue

Answer 16

Simplest, one cell thick

Question 17

Describe a columnar tissues

Answer 17

Elongated, have cilia

Question 18

Descrube a squamous tissue

Answer 18

Flattened

Question 19

Define a muscle tissue

Answer 19

Tissue thats able to contract

Question 20

Describe a skeletal msucle tissue

Answer 20

Striped, voluntary and attached to bones for locomotion

Question 21

Describe a smooth muscle tissue

Answer 21

Spindle shaped cells, no stripes, involuntary

Question 22

Describe a cardiac muscle tissue

Answer 22

Heart muscle, striated, short fibred and contracts without nerve stimulation

Question 23

Describe a connective tissue

Answer 23

Separates tissues and organs

Question 24

What’s the most light and electron microscope can magnify to?

Answer 24

Light = x2000
Electron = x100000

Question 25

Name the calculation for Magnification

Answer 25

Magnifcation = image size/actual size

Question 26

Define an organ

Answer 26

a group of tissues working together to perform a particular function

Question 27

Define an organsystem

Answer 27

a sysetm of organs working together with a particular role

Question 28

Define an organism

Answer 28

All of the systems working together forming a discrete individual

Question 29

Define exocytosis

Answer 29

Substances merging with the plasma membrane to exit the cell

Question 30

Define endocytosis

Answer 30

Substances merging with the plasma membrane to enter a cell

Question 31

Describe the function of a xylem tissue

Answer 31

Transports water and minerals up to the stems

Question 32

Describe the function of a phloem tissue

Answer 32

Transports dissolved suagrs around the plants

Question 33

Describe the functions of different parts of a plant cell

Answer 33

Upper epidermis = cells that are found at the surface, lets light in
Plasade Mesophyll = photosynthesis
Spongy Mesophyll = some photosynthesis, provides air space for transport of gases