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Photosynthesis

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Photosynthesis is the

a)

The process of converting light into sound

b)

The process of converting light into energy for plants

c)

The process of converting water into oxygen

2.

Chloroplasts are found mainly in cells of

a)

mesophyll

b)

chlorophyll

c)

cytokinesis

d)

thylakoid

3.

A typical mesophyll cell has _____ chloroplasts

a)

20-50

b)

30-40

c)

10-20

d)

20-30

4.

The chlorophyll is in the membranes of

a)

Thylakoid

b)

mesophyll

c)

chloroplast

5.

Photosynthesis can be summarized as the following equation

a)

6 CO2 + 12 H2O + Light energy ->

C6H12O6 + 6 O2 + 6 H2O

b)

C6H12O6 + 6 O2 + 6 H2O + Light energy ->

6 CO2 + 12 H2O

c)

CO2 + H2O →

C6H12O6 + O2

6.

Photosynthesis is a redox process in which H2O is

a)

oxidized

b)

reduced

7.

Photosynthesis is a redox process in which CO2 is

a)

reduced

b)

oxidized

8.

what are the 2 stages of photosynthesis

a)

Transcription and translation

b)

Light reaction and Calvin cycle

c)

Glycolysis and Krebs cycle

d)

Anaerobic and aerobic phases

9.

Substances that absorb visible light are known as

a)

Invisibleators

b)

See-throughizers

c)

pigments

d)

Transparency enhancers

10.

leaves are green because Chlorophyll molecules of chloroplast absorb ____ and emit green light

a)

blue- violet and red light

b)

X-rays and transmit rainbow light

c)

Infrared and transmit black light

11.

Spectrophotometer is an instrument for

a)

measuring the ability of a pigment to absorb various wavelengths of light

b)

Counting the number of cells in a sample

c)

Analyzing the chemical composition of rocks

12.

The light reactions in the thylakoids Generate ATP from ADP by

a)

Photoshopping them

b)

photophosphorylation

c)

Frying them in sunlight

d)

Utilizing the power of dance

13.

(3 types of pigments)
• participates directly in the light reactions
• Absorbs light
• Can be found in all photosynthetic plants, algae and cyanobacteria.

a)

chlorophyll a

b)

chlorophyll b

c)

Carotenoids

14.

(3 types of pigments)

• the accessory pigment
• Absorbs light
• Can be found in plants and green algae

a)

chlorophyll a

b)

chlorophyll b

c)

Carotenoids

15.

(3 types of pigments)

• group of accessory pigment

• Absorb violet and blue-green light
• Absorb excess energy and dissipate it as heat

a)

chlorophyll a

b)

chlorophyll b

c)

Carotenoids

16.

Photosystem is

a)

composed of a reaction- center complex surrounded by several light-harvesting complexes

b)

A secret society of plants that love taking selfies

c)

A new smartphone app for nature photography

17.

(Thylakoid membrane ps I & ps II)

The reaction-center chlorophyll a of photosystem II is known as

a)

P680

b)

P700

c)

P99

18.

(Thylakoid membrane ps I & ps II)

• the reaction-center complex of photosystem I is called

a)

P200

b)

P700

c)

P680

19.

(3 Phases of Calvin Cycle)

The Calvin cycle incorporates each CO2 molecule, by attaching it ribulose bisphosphate (abbreviated RuBP). The enzyme that catalyzes this first step is RuBP carboxylase, or rubisco. The product of the reaction is a six-carbon intermediate

a)

Phase 1: Carbon Fixation

b)

Phase 2: Reduction

c)

Phase 3: Regeneration of the CO2 acceptor (RuBP)

20.

(3 Phases of Calvin Cycle)

Each molecule of 3- phosphoglycerate receives an additional phosphate group from ATP, becoming 1,3 diphosphoglycerate. Next, a pair of electrons donated from NADPH reduces 1,3 diphosphoglycerate, which also loses a phosphate group, becoming G3P. There are six molecules of G3P formed (G3P is a sugar—the same three- carbon sugar formed in glycolysis by the splitting of glucose).

a)

Phase 1: Carbon Fixation

b)

Phase 2: Reduction

c)

Phase 3: Regeneration of the CO2 acceptor (RuBP)

21.

(3 Phases of Calvin Cycle)

G3P are rearranged by the last steps of the Calvin cycle into three molecules of RuBP. To accomplish this, the cycle spends three more molecules of ATP. The RuBP is now prepared to receive CO2 again, and the cycle continues.

a)

Phase 1: Carbon Fixation

b)

Phase 2: Reduction

c)

Phase 3: Regeneration of the CO2 acceptor (RuBP)

22.

For the net synthesis of one G3P molecule:

The Calvin cycle consumes a total of:

How many molecules of ATP?

How many molecules of NADPH?

a)

The Calvin cycle consumes a total of 6 molecules of ATP, and 9 molecules of NADPH

b)

The Calvin cycle consumes a total of 9 molecules of ATP, and 6 molecules of NADPH

c)

The Calvin cycle consumes a total of 8 molecules of ATP, and 2 molecules of NADPH

d)

The Calvin cycle consumes a total of 12 molecules of ATP, and 9 molecules of NADPH

23.

This mechanical analogy involving photosystem I

& photosystem II is an analogy for?

a)

Cyclic electron flow

b)

Linear Electron Flow

24.

An alternative path that uses photosystem I

but not photosystem II

a)

Linear Electron Flow

b)

Cyclic Electron Flow

25.

In this alternative path there is no

production of NADPH and no

release of oxygen

a)

Cyclic Electron Flow

b)

Linear Electron Flow