5.2.3 - Chloroplasts : Structure & Function

Question 1

What Occurs In The Chloroplasts?

Answer 1

Photosynthesis.

Question 2

Describe The Structure Of Chloroplasts
(5 Points)

Answer 2

~ Surrounded by a double membrane.

~ Filled with the stroma.

~ Contains thylakoids, grana and lamellae.

~ Contains chlorophyll.

~ Contains photosystems.

Question 3

Describe The ‘Double Membrane’ As A Component Of The Chloroplasts
(2 Points)

Answer 3

~ Known as the chloroplast envelope.

~ Encloses the chloroplast, keeping all the components needed for photosynthesis, close by.

Question 4

Describe The ‘Stroma’ As A Component Of The Chloroplasts

Answer 4

Contains all the enzymes, sugar and organic acids, required for photosynthesis.

Question 5

Describe The ‘Thylakoids’ As A Component Of The Chloroplasts
(3 Points)

Answer 5

~ Each, surrounded by a thylakoid membrane.

~ Space between the double membrane, is known as the thylakoid space, which is where a proton gradient can be established.

~ Have a large surface area, to maximise light absorption.

Question 6

Describe The ‘Grana’ As A Component Of The Chloroplasts
(3 Points)

Answer 6

~ Are stacks of thylakoid.

~ Create a large surface area, maximising number of photosystems, therefore light absorption.

~ Provide more membrane space, for proteins and enzymes.

Question 7

Describe The ‘Lamellae’ As A Component Of The Chloroplasts

Answer 7

Connects the grana together.

Question 8

Describe The ‘Chlorophyll’ As A Component Of The Chloroplasts
(2 Points)

Answer 8

~ Absorb light energy.

~ Are found in the thylakoid membrane, where they are attached to proteins.

Question 9

Describe The ‘Photosystems’ As A Component Of The Chloroplasts
(3 Points)

Answer 9

~ There is PSI and PSII.

~ Both contain different combinations of photosynthetic pigments.

~ Both, absorb light energy at different wavelengths, maximising light absorption.