Cellular Respiration

Do assignment on a separate sheet of paper and turn in at the beginning of class tomorrow.

Key Concept

The overall process of cellular respiration converts sugar into ATP using oxygen.

Vocabulary

cellular respiration

anaerobic

aerobic

Krebs cycle

glycolysis

 

Main Idea: Cellular respiration makes ATP by breaking down sugars.

Circle the word or phrase that best completes the statement.

  1. Cellular respiration is a process that releases glucose / energy from sugars
and other carbon-based molecules to make ATP when
oxygen / carbon dioxide is present.

  2. Cellular respiration is called an aerobic process, because it needs oxygen / carbon dioxide to take place.

  3. Cellular respiration takes place in the chloroplasts / mitochondria.

  4. During glycolysis, one molecule of glucose / protein is split into two three-carbon molecules and two ADP / ATP are formed.

Main Idea: Cellular respiration makes ATP by breaking down sugars.

5. Circle the two ways in which cellular respiration seems to be the opposite
of photosynthesis.

a. The reactions occur at either end of the chloroplast.

b. The overall chemical equations are the reverse of each other.

c.   Cellular respiration breaks down sugars to make ATP, and photosynthesis uses ATP to make sugars.

d.   Cellular respiration produces oxygen, and photosynthesis produces carbon dioxide.

6. Circle the two parts of a mitochondrion where cellular respiration takes place.

a. matrix

b  stroma

c. inner mitochondrial membrane

d. outer mitochondrial membrane

7. The overall process of cellular respiration can be written as a chemical equation. Fill in the blanks in the equation below using the appropriate compound from the box.

6O2

6CO2

6H2O

C6H12O6

 

__________ + __________ à ________ + ________

  8. The two reactants in the cellular respiration equation are ________ and _________.

  9. The two products in the cellular respiration equation are ________ and _________.

10. Why is the cellular respiration equation written with several arrows?

a. Because a series of products result from the reaction.

b. Because a series of reactants enter into the reaction.

c. Because a series of chemicals is added to the process.

d. Because a series of chemical reactions occurs.

Question 11 intentionally skipped

Vocabulary Check

Fill in the blank with the word or phrase that best completes the sentence.

12. The prefix glyco- comes from a Greek word that means “sweet.” The suffix
-lysis comes from a Greek word that means “to loosen.” Therefore, during glycolysis, a _________ is broken down (or “loosened”).

13. Glycolysis is an anaerobic process, because it takes place without __________________.

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