cellular respiration


Specifically, during cellular respiration, the energy stored in glucose is transferred to ATP ( Figure 1.1). ATP, or adenosine triphosphate, is chemical energy the cell can use. It is the molecule that provides energy for your cells to perform work, such as moving your muscles as you walk down the street. But cellular respiration is slightly more complicated than just converting the energy from glucose into ATP. Cellular respiration can be described as the reverse or opposite of photosynthesis. During cellular respiration, glucose, in the presence of oxygen, is converted into carbon dioxide and water. Recall that carbon dioxide and water are the starting products of photosynthesis. What are the products of photosynthesis? The process can be summarized as: glucose + oxygen carbon dioxide + water. During this process, the energy stored in glucose is transferred to ATP. Energy is stored in the bonds between the phosphate groups (PO4 ) of the ATP molecule. When ATP is broken down into ADP (adenosine diphosphate) and inorganic phosphate, energy is released. When ADP and inorganic phosphate are joined to form ATP, energy is stored. During cellular respiration, about 36 to 38 ATP molecules are produced for every glucose molecule. The structural formula for adenosine triphosphate (ATP). During cellular respi- ration, energy from the chemical bonds of the food you eat must be transferred to ATP.


what is cellular respiration

How does the food you eat provide energy? When you need a quick boost of energy, you might reach for an apple or a candy bar. But cells do not "eat" apples or candy bars; these foods need to be broken down so that cells can use them. Through the process of cellular respiration, the energy in food is changed into energy that can be used by the bodys cells. Initially, the sugars in the food you eat are digested into the simple sugar glucose, a monosaccharide. Recall that glucose is the sugar produced by the plant during photosynthesis. The glucose, or the polysaccharide made from many glucose molecules, such as starch, is then passed to the organism that eats the plant. This organism could be you, or it could be the organism that you eat. Either way, it is the glucose molecules that holds the energy.

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the main reason you need to eat is to get energy.

-->  a. true

b. false

cellular respiration can be described as the reverse or opposite of photosynthesis.

-->  a. true

b. false

which of the following supplies your body with energy?

a) sunlight

-->  b) food

c) carbon dioxide

d) all of the above

the process of obtaining energy from food is

a) photosynthesis.

-->  b) cellular respiration.

c) glucose.

d) atp.

which best summarizes cellular respiration?

a) carbon dioxide + water  glucose + oxygen

b) carbon dioxide + oxygen  glucose + water.

c) glucose + water  carbon dioxide + oxygen

-->  d) glucose + oxygen  carbon dioxide + water.

essentially, what occurs during cellular respiration?

a) energy is released from glucose.

b) atp is formed from glucose and oxygen.

c) the energy stored in carbon dioxide is converted into glucose.

-->  d) the energy stored in glucose is converted into atp.

which of the following is a polysaccharide?

a) atp

b) glucose

-->  c) starch

d) carbon dioxide

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