SB6a Photosynthesis

Question 1

Biomass?

Answer 1

the total mass in living organisms, usually shown as the mass after drying

Question 2

Photosynthesis?

Answer 2

A series of chemical reactions, catalysed (sped up) by enzymes

Question 3

State photosynthesis word equation.

Answer 3

Carbon dioxide + water -> glucose + oxygen

Question 4

Where does photosynthesis occur?

Answer 4

in chloroplasts, which contain chlorophyll that traps energy transferred by light

Question 5

Is photosynthesis an exo or endothermic reaction?

Answer 5

it is an endothermic reaction, as energy enters from the surroundings

Question 6

What is made during photosynthesis?

Answer 6

glucose molecules which link to form a polymer called starch

Question 7

What does the upper and lower epidermis in leafs do?

Answer 7

holds the leaf together and protects

Question 8

Stoma?

Answer 8

a tiny hole in a leaf through which water vapour and oxygen can diffuse into and out of the leaf. It is opened and closed by two specialised guard cells

Question 9

What do the guard cells do in light?

Answer 9

become rigid and open the stoma

Question 10

What do the guard cells do in dark?

Answer 10

lose rigidity and close the stoma