Chapter 9 Cellular Respiration and Fermentation

Question 1

The energy stored in the organic molecules of food ultimately comes from the

Answer 1

sun

Question 2

Energy flows into an ecosystem as sunlight and exits as

Answer 2

heat

Question 3

Photosynthesis generates oxygen, as well as organic molecules used by the mitochondria of

Answer 3

eukaryotes as fuel for cellular respiration.

Question 4

Respiration breaks this fuel down, using

Answer 4

oxygen and generating ATP.

Question 5

The waste products of this type of respiration, carbon dioxide and water, are the

Answer 5

raw materials for photosynthesis.

Question 6

the ingredients for photosynthesis are

Answer 6

carbon dioxide and water

Question 7

carbon dioxide is obtained from the air by

Answer 7

plants leaves

Question 8

water is obtained from

Answer 8

the damp soil by a plant’s roots

Question 9

the chloroplasts present in the cells of leaves use energy from sunlight to convert carbon dioxide and water into

Answer 9

organic molecules like glucose

Question 10

the process also releases

Answer 10

oxygen into the environment

Question 11

in eukaryotic cells, many of the steps of cellular respiration takes place in

Answer 11

mitochondria

Question 12

organic molecules and oxygen from photosynthesis are used in

Answer 12

cellular respiration to generate ATP, which powers the work of the cell

Question 13

during cellular respiration, some energy is released as

Answer 13

heat

Question 14

carbon dioxide and water are also released as

Answer 14

waste products

Question 15

they are recycled as the

Answer 15

raw material for photosynthesis

Question 16

in an ecosystem, energy flows in one direction from

Answer 16

sunlight to chemical energy in molecules to heat

Question 17

in contrast, chemicals cycle between

Answer 17

organisms and the physical environment

Question 18

three key pathways of respiration:

Answer 18

glycolysis, pyruvate oxidation and the citric acid cycle, and oxidative phosphorylation