Cell organelles

Question 1

Describe the cell surface membrane

Answer 1

Made of lipids and proteins and contains receptor molecules.
Regulates movement in and out of cell.

Question 2

Describe the nucleus

Answer 2

Surrounded by a nuclear envelope which contains pores.
The pores allow substances to move between nucleus and cytoplasm.
Controls the cells activities

Question 3

Describe the mitochondria

Answer 3

Contains cristae and matrix.
Site of aerobic respiration.
Where ATP is made

Question 4

Describe the chloroplast

Answer 4

Contains thylakoid membranes, grana, stroma and lamella.
Site of photosynthesis

Question 5

Describe the golgi apparatus

Answer 5

Fluid filled membrane bound flattened sacs.
Processes and packages lipids & proteins.
Makes lysosomes

Question 6

Describe the golgi vesicle

Answer 6

Fluid filled sacs
Produced by golgi apparatus
Stores lipids and proteins, and transports them out of the cell

Question 7

Describe the lysosome

Answer 7

Round organelle (type of golgi vesicle)
Contains digestive enzyme (lyzozymes), which digest invading cells

Question 8

Describe the ribosomes

Answer 8

Made up of proteins and RNA
Site of protein synthesis

Question 9

Describe the rough endoplasmic reticulum

Answer 9

System of membranes covered with ribosomes
Folds and processes proteins

Question 10

Describe the smooth endoplasmic reticulum

Answer 10

System of membranes with no ribosomes
Synthesises and processes lipids

Question 11

Describe the cell wall

Answer 11

Rigid (made from cellulose/chitin)
Supports cells and prevent changes in shape

Question 12

Describe the cell vacuole

Answer 12

Contains cell sap
Helps to maintain pressure
Stops plants from wilting