5.2 Photosynthesis (Overview)* Flashcards

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1
Q

What is Carbon Dioxide reduced to?

A

Carbon Dioxide is reduced as hydrogen and electrons from water are added to it creating a carbohydrate.

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2
Q

What is the process of splitting up water?

A

Photosynthesis uses energy from sunlight to split water

Process is called photolysis of water: involvement of energy from light in the reaction

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3
Q

What can be glucose be converted to?

A
Glucose is converted into a variety of chemical substances needed by the plant
	• Starch
	• Cellulose
	• Fats
	• Amino Acids
	• Proteins
	• Nucleic acids
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4
Q

What are the extra elements and where are they taken up?

A

Extra elements: nitrogen + phosphorous (taken up by the roots from soil)

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5
Q

Why is Photosynthesis important?

A
  1. Organic molecules are passed on through food webs
    1. Animals cannot make all the organic compounds
    2. Plants release oxygen gas into the atmosphere which organisms need for aerobic respiration
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6
Q

What are the two stages of Photosynthesis?

A
  1. Light-Dependent Reactions: Energy from light + hydrogen from photolysis of water: produce reduced NADP, ATP + waste produce oxygen.
    1. Light-Independent Reactions: Use reduced NADP + ATP from the light-dependent reactions to reduce carbon dioxide to carbohydrates.
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