11 Photosynthesis

Question 1

Metabolic Pathway

Answer 1

A series of small reactions controlled by enzymes

Question 2

Phosphorylation

Answer 2

Adding phosphate to a molecule e.g. ADP is phosphorylated to ATP

Question 3

Photophosphorylation

Answer 3

Adding phosphate to a molecule using light

Question 4

Photolysis

Answer 4

The splitting of a molecule using light energy

Question 5

Photoionization

Answer 5

When light energy ‘excites’ electrons in an atom or molecule, giving them more energy and causing them to be released. This release of electrons causes the atom or molecule to become a positively charged ion

Question 6

Hydrolysis

Answer 6

The splitting of a molecule using water

Question 7

decarboxylation

Answer 7

The removal of carbon dioxide from a molecule

Question 8

dehydrogenation

Answer 8

The removal of hydrogen from a molecule

Question 9

redox reactions

Answer 9

Reactions that involve both oxidation and reduction

Question 10

coenzymes

Answer 10

A molecule that aids the function of an enzyme. Used in metabolic pathway to carry hydrogen ions, the one in photosynthesis is NADP.

Question 11

photosystems

Answer 11

Embedded within the thylakoid membrane and is made up of protein and pigments

Question 12

Products LDR creates

Answer 12

ATP and NADPH

Question 13

What’s NADPH made from

Answer 13

NADP+ and 2e-

Question 14

3 functions of LDR.

Answer 14

ATP synthesis, photolysis, and formation of NADPH.

Question 15

What’s the first stage of photosynthesis?

Answer 15

1. The first stage is a light-dependent reaction.
2. It needs light energy and takes place in the thylakoid membranes.