cells

Photosynthesis vs. cellular respiration

Cellular respiration

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photosynthesis

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Energy and the Cell

The World of CellsThe World of Cells

11

• Cells, except bacteria, have organelles called mitochondria (mi tuh KAHN dree uh).

• An important process called cellular respiration takes place inside a mitochondrion.

Energy and the Cell

The World of CellsThe World of Cells

11

• Cellular respiration is a series of chemical reactions in which energy stored in food is converted to a form of energy that the cell can use.

Energy and the Cell

The World of CellsThe World of Cells

11

• This energy is released as food and oxygen combine.

• Waste products of this process are carbon dioxide and water.

Nature's Solar Energy Factories

The World of CellsThe World of Cells

11

• Animals obtain food from their surroundings.

• Plants, algae, and many types of bacteria make food through a process called photosynthesis (foh toh SIHN thuh sus).

Nature's Solar Energy Factories

The World of CellsThe World of Cells

11

• Most photosynthesis in plants occurs in leaf cells.

• Inside these cells are green organelles called chloroplasts (KLOR uh plats).

Nature's Solar Energy Factories

The World of CellsThe World of Cells

11

• During plant photosynthesis chloroplasts capture light energy and combine carbon dioxide from the air with water to make food.

• As the plant needs energy, its mitochondria release the food's energy.

Read the article “Photosynthesis and cellular respiration” http://www.buzzle.com/articles/photosynthesis-and-cellular-respiration.html

and read textbook p. 480-481• Students will categorize information about both

processes using cutout info and blank title papers• After they are checked for correctness, they will record

info on notes

Read the article “Photosynthesis and cellular respiration” http://www.buzzle.com/articles/photosynthesis-and-cellular-respiration.html

and read textbook p. 480-481• Compare

Photosynthesis only Cellular respiration only

Photosynthesis only Cellular respiration

11Section CheckSection Check

Question 3

Where is food energy changed into a form of energy that a cell can use?

A. chloroplastB. nucleusC. mitochondrionD. vacuole

11Section CheckSection CheckSection CheckSection Check

Answer

The correct answer is C. Mitochondria are bean-shaped organelles.