Photosynthesis and respiration

Question 1

What do plants need energy for?

Answer 1

• Photosynthesis, active transport , DNA replication, cell division and protein synthesis

Question 2

Photosynthesis equations?

Answer 2

6CO2 +6H2O -> C6H12O6 +6O2

Question 3

As animals can not “make their own glucose”, how can they get glucose?

Answer 3

By eating plants, and then respire this glucose.

Question 4

Aerobic respiration

Answer 4

C6H12O6+ 6O2 -> CO2 +H2O

Question 5

what is Photophosphorylation? (def)

Answer 5

Adding phosphate to a molecule using light

Question 6

What is photolysis (def)?

Answer 6

The splitting of a molecule using light

Question 7

What coenzyme in photosynthesis carries hydrogen

Answer 7

NADP

Question 8

What are photosynthetic pigments and give some examples?

And where are the pigments found?

Answer 8

Coloured substances that absorb the light energy needed for photosynthesis

e. g: Chlorophyll a, chlorophyll b, carotene
- These pigments are found in the thylakoid membrane

Question 9

What is a photosystem?

Answer 9

A pigment and a protein attached together

Question 10

What are the 2 types of photosynthetic pigments that a photosystem has?

Answer 10

1) primary pigments - reaction centre where electrons are excited.

2) Accessory pigments - Makes up light harvesting systems:
- they surround the reaction centres and transfer light energy to them, to make an electron become excited.

Question 11

PSI ?

Answer 11

Photosystem I

Absorbs light best at a wavelength of 700nm

Question 12

PS2?

Answer 12

Photosystem II

Absorbs light best at 680nm wave length

Question 13

What are carbohydrates that are produced by photosynthesis but not used straight away, stored as?

Answer 13

Stored as starch grain