Chloroplast, stroma and thylakoids

Question 1

What cells are chloroplasts only found in?

Answer 1

Plant cells

Question 2

What type of membrane do each chloroplast contain?

Answer 2

Double membrane

Question 3

What is the stroma?

Answer 3

Is a colourless, gelatinous matrix
Contains small (70S) ribosomes, circular DNA belonging to the chloroplast (self-replication), lipid and starch grains

Question 4

What are thylakoids?

Answer 4

Located in the stroma
Are flattened sacs
Are stacked to form grana (singular granum) connected to each other by lamellae

Question 5

What is the main function of chloroplasts?

Answer 5

Site of photosynthesis (conversion of light energy to chemical energy) in plants
Photosynthetic pigments such as chlorophyll are found within each thylakoid