2.5 Ultrastructure Of Plant Cells

Question 1

What is a plant cell wall made of?

Answer 1

Cellulose

Question 2

Function of the cell wall

Answer 2

Give a cell shape
Make the cell rigid
It’s freely permeable, so substances can pass in and out
Acts as a defence mechanism, protecting against pathogens

Question 3

What are vacuoles?

Answer 3

Membrane lined sacs in the cytoplasm, which contain cell sap

Question 4

Function of vacuole

Answer 4

Maintain turgor pressure, so the contents of the cell push against the cell wall

Question 5

What is the membrane of a vacuole called?

Answer 5

Tonoplast

Question 6

How permeable is the membrane of a vacuole?

Answer 6

Selectively permeable

Question 7

Function of chloroplast

Answer 7

Where photosynthesis takes place

Question 8

Is the chloroplast a single or double membrane structure?

Answer 8

Double membrane structure

Question 9

What is the stroma?

Answer 9

The fluid enclosed in the chloroplast

Question 10

What are the thylakoids?

Answer 10

Internal network of membranes forming flattened sacs

Question 11

What is a granum?

Answer 11

Many thylakoids stacked together

Question 12

How are grana joined?

Answer 12

By membranes called lamellae

Question 13

Where is the chlorophyll pigment found?

Answer 13

In the grana