Chapter 07 Core Content

In which of the following organelles does photosynthesis take place?

Chloroplast

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

thylakoids; stroma

Which of these equations best summarizes photosynthesis?

6 CO2 + 6 H2O → C6H12O6 + 6 O2

Which of the following equations represents photosynthesis?

6CO2 + 6H2O → C6H12O6 + 6O2

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

ATP and NADPH

What connects the two photosystems in the light reactions?

An electron transport chain

Where does the energy for the Calvin cycle come from?

NADPH and ATP

Plants are photosynthetic autotrophs. What does this mean?

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

Where does the Calvin cycle occur?

e

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

The overall function of the Calvin cycle is ___

making sugar

Paper chromatography is used to ___

separate components in a material of interest

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

splitting water

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

sunlight

The light reactions of photosynthesis use _____ and produce __

water .... NADPH

The radioactive isotope used in the Calvin experiments was __

carbon 14

The Calvin cycle describes the conversion of

carbon dioxide to carbohydrates

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

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

Carbon dioxide (CO2)

What provides electrons for the light reactions?

H20

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

NADPH

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

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

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

algae