unit 1 key area 1 cell structure and functions

Question 1

functions of a nucleus?

Answer 1

controls all cell activities,
contains DNA,
surrounded by a membrane

Question 2

functions of a cell membrane?

Answer 2

controls the entry and exit of molecules to and from the cell,
selectively permeable,
made of phopholipids and proteins

Question 3

functions of cytoplasm?

Answer 3

the site of many chemical reactions,

has a gel like fluid which makes up most of the cell

Question 4

functions of mitochondria?

Answer 4

the site of aerobic respiration,
produce ATP for all cell activities,
has a folded inner membrane and an outer membrane

Question 5

functions of ribosome?

Answer 5

the site of protein synthesis

found in either the cytoplasm attached to the rough endoplasmic reticulum

Question 6

functions of a cell wall?

Answer 6

provides structure and support to the cell and prevents it from bursting
freely permeable so anything can pass through
made from cellulose fibres

Question 7

functions of vacuole?

Answer 7

helps cell to maintain their water balance
contains a store of water and chemicals
surrounded by a membrane

Question 8

functions of chloroplast?

Answer 8

the site of photosynthesis
contains chlorophyll
surrounded by a double membrane
found only in plants