Chapter 07 Core Content

Which of these equations best summarizes photosynthesis?

6 CO2 + 6 H2O → C6H12O6 + 6 O2

Where does the Calvin cycle occur?

e

The light reactions of photosynthesis use _____ and produce __

water .... NADPH

Can you fill in the photosynthesis equation?

CO2 source of carbon & Oxygen
H2O source of electrons & hydrogen
Light energy that drives photosynthesis
Glucose sugar
O2 - Gas produced from splitting water

Part A - Two stages of photosynthesis
Drag the labels onto the diagram to identify the inputs and outputs of the two stages of photosynthesis. Use only pink labels for pink targets.

left: light
light Reactions
O2

middle: ATP

right: CO2
Clavin Cycle
glucose

Which of the following equations represents photosynthesis?

6CO2 + 6H2O → C6H12O6 + 6O2

In which of the following organelles does photosynthesis take place?

Chloroplast

What connects the two photosystems in the light reactions?

An electron transport chain

What two molecules are produced by the light reactions and used to power the Calvin cycle?

ATP and NADPH

What provides electrons for the light reactions?

H20

What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?

Carbon dioxide (CO2)

What transports electrons from the light reactions to the Calvin cycle?

NADPH

The light reactions take place in the _________ and the Calvin cycle takes place in the _

thylakoids; stroma

First drag labels to the appropriate targets at the left to identify the parts of the chloroplast in this diagram. Then drag labels to the appropriate targets to identify the structures involved in the light reactions

a. stroma
b. thylakoid membrane
c. thylakoid space
d. photosystem II
e. electron transport chain
f. photosystem I
g. ATP synthase

The radioactive isotope used in the Calvin experiments was __

carbon 14

The Calvin cycle describes the conversion of

carbon dioxide to carbohydrates

Paper chromatography is used to ___

separate components in a material of interest

What type of organism was used in Calvin's experiments?

algae

First drag the blue labels to blue targets to identify the steps of the Calvin cycle.

Then drag the white labels to white targets to identify the molecules involved in the cycle. Some labels are used more than once

a. carbon fixation
b. reduction
c. release of one G3P
d. regeneration of RuBP
e. RuBP
f. CO2
g. rubisco
h. ATP
i. NADPH
j. G3P
k. G3P
l. G3P
m. ATP

Plants are photosynthetic autotrophs. What does this mean?

They use light energy to drive the synthesis of organic molecules.

The ultimate energy source that supports most life on Earth is __

sunlight

Where does the energy for the Calvin cycle come from?

NADPH and ATP

The overall function of the Calvin cycle is ___

making sugar

When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by other electrons obtained by ___

splitting water