1. The diagram below shows a simplified diagram of photosynthesis involving C3 plant.

a. Photosystem consists of two main components; chlorophyll molecules and

specialized pigment called reaction centre. State the function of every component

during photoactivation.

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b. U is by-product of photosynthesis. What is U?

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c. Name enzyme V that catalyzed the carbon dioxide fixation in Calvin cycle.

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d. What is the role of NADPH in photosynthesis

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e. In the diagram above, T is the important factor in photolysis. What is T?

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f. What is meant by photolysis of water?

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2. The diagram below shows Calvin cycle in the light independent reaction.

a. Which part of chloroplast that the above reaction occurs?

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b. What is X?

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c. Name the enzyme that fix X to form 3-phosphoglycerate

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d. Y and Z are the products of light dependent reaction.

i. What is Y?

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ii. What is Z? state the importance of Z in Calvin cycle.

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3. The diagrams below show two pathways, P and Q for light independent reaction. These

pathway are ideal for photosynthesis to be carried out in hot and dry condition.

a. Name pathways P and Q

P : ___________________________________________________

Q : __________________________________________________

b. Give two differences between pathway P and Q.

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c. Enzyme S is used by most plant to carry out light independent reaction whereas

plants that used pathways P and Q used enzyme R together with enzyme S.

i. Name enzyme R according to IUB

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ii. Give the advantage of enzyme R compared to enzyme S.

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4. There are two phases in photosynthesis.

a. Where is the location for:

i. Light dependent reaction : _________________________________

ii. Light independent reaction : __________________________________

b. What is the function of chlorophyll?

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c. Name molecule that acts as carbon dioxide acceptor in Calvin cycle?

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d. Name the products of light dependent reaction.

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e. State the function of the products in light independent reaction

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f. State two characteristics that distinguish between cyclic photophosphorylation

and non-cyclic photophosphorylation.

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g. How many cycle of light dependent reaction and light independent reaction to

produce one molecule of glucose?

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5. Diagram below shows one of the cycle in photosynthesis.

a. What is P, Q, R, S, T, U and V?

P: __________________________ Q:___________________________

R: __________________________ S:____________________________

T: __________________________ V:____________________________

U: __________________________

b. Give an example of pelan with the above cycle.

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c. Explain the problem faced by the above plant that causes the plant to have an

alternative cycle.

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6. FIGURE shows the metabolism cycle of plants X.

a. Name the mechanism of carbon fixation of plant X.

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b. State the advantage of plant X.

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c. Substance Y is required to convert OAA to substance Z. Identify Y and Z.

Y:__________________________________________________________

Z: ___________________________________________________________

d. Name cycle W.

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e. List THREE phases of this cycle.

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f. State ONE product from this reaction.

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7. FIGURE shows the summary of the light dependent reaction in photosynthesis.

g. Name the substance A and B.

A :_______________________________________________________________

B :_______________________________________________________________

h. Name the process M and N.

M: _______________________________________________________________

N: _______________________________________________________________

i. Where do PS I and PS II occur?

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j. State the source of electron for non – cyclic photophosphorylations in

photosynthesis.

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k. Give TWO differences between cyclic and non-cyclic photophosphorylations in

photosynthesis.

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8. FIGURE 4 shows a Hatch-Slack pathway found in many tropical plants.

l. Name cell X and cell Y.

Cell X : ___________________________________________________________

Cell Y : ___________________________________________________________

m. Why photosynthesis is difficult for most plant in the very hot condition and dry

environment such as the desert?

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n. What is the advantage of C4 pathway in the photosynthesis process.

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o. State TWO differences between the chloroplast in cell X and cell Y.

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p. Name the CO2 acceptor in :

Cell X : ________________________________________________________

Cell Y : ________________________________________________________

q. Give ONE example of plant that has this pathway.

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9. The diagram below shows the process in photosynthesis.

r. Label the following,

A: _____________________

B: _____________________

C: _____________________

s. Where does the reaction takes place?

i. Light dependent reaction : _______________________

ii. Calvin cycle : ________________________

t. What are the products produced by light dependent reaction?

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u. Give differences between photosynthesis and aerobic respiration.

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A

B

C

10. FIGURE shows a pathway of glucose production in a type of plant.

v. State the type of plant that have the pathway as in FIGURE.

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w. What is the purpose of cycle S?

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x. What is the advantage of enzyme Q?

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y. Name process X.

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z. Give the name of the substances in cycle S.

I

II

III

IV

: _____________________________________

: _____________________________________

: _____________________________________

: _____________________________________

aa. Name the enzyme that is used in cycle T.

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bb. Name the condition which can lead to the above pathway.

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11. Figure below shows the cross-section of a cell organelle.

cc. Label structure A and B

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dd. Which structure carries out the light dependent reaction stage of photosynthesis?

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ee. Name the three products of the light dependent reaction stage of photosynthesis.

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ff. What is the final electron acceptor in the electron transport chain?

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gg. Name the gas that is produce during photosynthesis.

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hh. Explain the process that leads to the production of the gas mention in (e).

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C

B A

12. The diagram below shows some of the processes which occur in the light independent

reaction of photosynthesis.

ii. Name the substances represented by the letters X and Y.

X : _________________

Y : _________________

jj. State the origin of the NADPH + H+ and the ATP used in the light independent

reaction.

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kk. Where in the chloroplast does the light independent reaction occur?

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13. The diagram below shows the dark reaction of photosynthesis.

ll. This cycle of reaction is often named after its discoverer. Give this name.

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5-carbon compound + X

regeneration

Triose phosphate

Glucose phosphate

NADPH + H+

ATP

Y

mm. Name the molecules which enter the cycle at R and T.

R : ________________________

T : ________________________

nn. Give the full names of the molecules S and U.

S : ________________________

U : ________________________

oo. What is produced at V?

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14. FIGURE shows the C4 pathway in C4 plants.

pp. What is another name for C4 pathway?

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qq. What are A, B, C and D?

A: ______________________________________________________________

B: ______________________________________________________________

C: ______________________________________________________________

D: ______________________________________________________________

rr. List THREE major steps in the C4 pathway.

i: ______________________________________________________________

ii: ______________________________________________________________

iii: ______________________________________________________________

ss. Where does the Calvin cycle take place in C4 plants?

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tt. Give an example of a C4 plants.

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