Cell structure

Question 1

What are the structures in the chloroplast?

Answer 1

• stroma = a fluid filled matrix which contains starch grains
• chloroplast envelope = a double plasma membrane that is highly selective of what enters and leaves a cell
• grana = stacks of up to 100 disc like structures called thylakoids which contain chlorophyll

Question 2

What is the function of the chloroplast?

Answer 2

• to carry out photosynthesis

Question 3

What are the adaptations of chloroplasts?

Answer 3

• granal membranes have a large SA for the attachment of chlorophyll, electron carriers and enzymes
• fluid that contains enzymes
• contains DNA and ribosomes which manfacture proteins

Question 4

What is the structure of the endoplamsic recticulum?

Answer 4

A network of flattened sacs and tubules

Question 5

What is the function and structure of the RER?

Answer 5

• has ribosomes on its surface
• provides a large SA for the attachments of proteins
• provides a pathway for the transport of materials( proteins) throughout a cell