Kerboodle 17

Question 1

a splitting of water into hydrogen ions, oxygen molecules, and electrons at photosystem II

Answer 1

Photolysis

Question 2

b method of separating biochemicals using an adsorptive medium and a solvent

Answer 2

Chromatography

Question 3

c set of reactions comprising carbon fixation, reduction, and regeneration steps

Answer 3

Calvin cycle

Question 4

d factor in shortest supply which controls the rate of reaction in a multi-step process

Answer 4

Limiting factor

Question 5

e area in which hydrogen ions build up inside a chloroplast

Answer 5

Thylakoid

Question 6

2 Describe the differences between:

a photosynthesis and respiration

Answer 6

Photosynthesis uses carbon dioxide but respiration produces it Photosynthesis uses water but respiration produces it Photosynthesis makes, glucose/sugars, but respiration uses, it/them Photosynthesis makes oxygen but respiration uses, it Photosynthesis uses light energy but respiration uses chemical energy to make ATP Photosynthesis occurs in, plants/green protoctists/algae/cyanobacteria, but respiration occurs in all organisms

Question 7

2 Describe the differences between: b the light-dependent and the light-independent reactions of photosynthesis

Answer 7

Light-dependent, requires light/can only happen in day, but light-independent, does not require light/may also occur in the dark Light-dependent makes ATP but light-independent uses ATP Light-dependent makes reduced NADP but light-independent uses reduced NADP Light-dependent occurs on thylakoid membranes but light-independent occurs in stroma Light-dependent rate is limited by light, intensity/wavelength, but light-independent is limited by, CO2 concentration/temperature

Question 8

2 Describe the differences between: c cyclic and non-cyclic photophosphorylation.

Answer 8

In cyclic electrons, flow in a circle/end up back at their starting point, but in non-cyclic electrons follow the Z-scheme Cyclic makes ATP only but non-cyclic makes ATP and reduced NADP

Question 9

ii In addition to the structures seen in Figure 1, a chloroplast also contains DNA and ribosomes. Suggest the role of DNA and ribosomes in this organelle.

Answer 9

(DNA) coding for, gene(s)/protein/enzyme or (ribosome) protein/enzyme, synthesis (Enzymes for production of/proteins for) chlorophyll synthesis/pigment synthesis/photosystem (Protein for) electron , acceptor(s)/carrier(s) ATP synth(et)ase (Enzyme / PSII) for, photolysis/splitting of water (Enzymes for) Calvin cycle/light-independent reaction