Organelles and Compartmentalisation

Question 1

Which three structures are not considered to be Organelles?

Answer 1

Cell Walls, Cytoskeletons, Cytoplasm

Question 2

Why are they not considered to be organelles?

Answer 2

Cell Walls - they are outside the cell membrane
Cytoskeletons - too big
Cytoplasm - too many functions

Question 3

Organelle definition?

Answer 3

An organelle is a subcellular structure that has one or more specific jobs to perform in the cell

Question 4

List Organelles with no membrane

Answer 4

Ribosomes, centrioles, microtubules, proteasome, nucleoli

Question 5

Organelles with a single membrane?

Answer 5

Vesicles, rough endoplasmic reticulum, smooth endoplasmic reticulum, golgi apparatus, lysosomes

Question 6

Organelles with a double membrane?

Answer 6

Nuclei, mitochondria, chloroplasts, amyloplasts, chromoplasts

Question 7

Why do Eukaryotic cells contain membrane bound organelles?

Answer 7

Because biological membranes act as barriers between aqueous solutions and are only permeable to a small number
of substances, allowing for diffusion and osmosis.