Plant cells

Question 1

Function and structure of the cell wall?

Answer 1

Cellulose cell wall; rigid structure; freely permeable; gives it shape; defence from pathogens

Question 2

What is the function of the vacuole?

Answer 2

Membrane lined sacs; maintenance of turgor; the membrane of it is tonoplast (selectively permeable)

Question 3

Structure of chloroplasts? (5)

Answer 3

• Double membrane structure;
• fluid enclosed is called the stroma;
• has internal network of membranes, forming flattened sacs - Thyakoids.
• Several of them are called grona (granum for plural) -joined together by a membrane called lamellae.

Question 4

What do the grana contain?

Answer 4

Chlorophyll for light dependent reactions; starch produced by photosynthesis is turned into grains

Question 5

Similarities and differences between mitochondria and chloroplasts?

Answer 5

Similarities: double membrane, both have own DNA an ribosomes, both make own proteins
- stroma vs matrix