Structure and function of chloroplasts- Photosynthesis

Question 1

What’s the role of the inner membrane with transport proteins?

Answer 1

• Controls entry and exit of substances between the cytoplasm and stroma

Question 2

What’s the role of grana consisting of stacks of thylakoids?

Answer 2

• gives a large SA for photosynthetic pigment, electron carriers and ATP synthase

Question 3

What’s the role of photosynthetic pigments?

Answer 3

• They’re arranged in photosystems to maximise absorption of light energy

Question 4

What’s the role of the stroma?

Answer 4

• contains enzymes to catalyse the light independent stage

Question 5

What’s the role of the positioning of the grana and stroma?

Answer 5

• grana are surrounded by stroma so that the products of the light dependent stage can easily pass from the grana to the stroma for use in the light independent stage

Question 6

What’s the role of chloroplast DNA and ribosomes?

Answer 6

• Manufacture of the proteins required for photosynthesis