cellular respiration reactions

what is cellular respiration

Cellular Respiration is the process in which the cells of living things break down the organic compound glucose with oxygen to produce carbon dioxide and water. The overall chemical equation for cellular respiration is: C6 H12 O6 + 6O2 6CO2 + 6H2 O As the Figure 1.1 shows, cellular respiration occurs in the cells of all kinds of organisms, including those that make their own food (autotrophs) as well as those that get their food by consuming other organisms (heterotrophs). Q: How is cellular respiration related to breathing? A: Breathing consists of inhaling and exhaling, and its purpose is to move gases into and out of the body. Oxygen needed for cellular respiration is brought into the body with each inhalation. Carbon dioxide and water vapor produced by cellular respiration are released from the body with each exhalation.


energy changes in cellular respiration

The reactions of cellular respiration are catabolic reactions. In catabolic reactions, bonds are broken in larger molecules and energy is released. In cellular respiration, bonds are broken in glucose, and this releases the chemical energy that was stored in the glucose bonds. Some of this energy is converted to heat. The rest of the energy is used to form many small molecules of a compound called adenosine triphosphate, or ATP. ATP molecules contain just the right amount of stored chemical energy to power biochemical reactions inside cells. Click image to the left or use the URL below. URL:

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organisms that make glucose are called autotrophs.

-->  a. true

b. false

cellular respiration takes place only in the cells of heterotrophs.

a. true

-->  b. false

the chemical reactions of cellular respiration are anabolic reactions.

a. true

-->  b. false

which compound directly powers biochemical reactions in cells?

a) glucose

b) carbon dioxide

-->  c) adenosine triphosphate

d) none of the above

during cellular respiration, chemical energy stored in glucose changes to

a) heat.

b) light.

c) chemical energy in atp

-->  d) two of the above

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