Name:______________________________
Period:_____
Date:______________
Respiration Reading Questions
Pg 221 to 222, pg 232
1.) What is cellular respiration?
The process where a cell releases energy by breaking down glucose (in the
presence of oxygen).
2.) Who performs cellular respiration?
All living organisms, in other words all plants, animals, bacteria, fungi, algae
and so on.
3.) What is ATP?
A chemical compound (or molecule) which stores and releases energy in
cells
4.) How is glucose related to cellular respiration?
Cellular respiration releases the energy stored in glucose
5.) How are mitochondria related to cellular respiration?
Cellular respiration occurs in the mitochondria.
6.) How is ATP related to cellular respiration?
ATP is the end product of cellular respiration
7.) Write the chemical formula for cellular respiration using symbols and words
6O2 + C6H12O6
Oxygen +glucose
6CO2 + 6H2O + energy
Carbon dioxide + water + energy
Reactants
Products
8.) Photosynthesis and cell respiration are usually thought of as opposite
processes. Explain why this is so.
Photosynthesis uses energy to combine carbon dioxide and water to make
glucose (and oxygen)
Cellular respiration takes glucose apart (in the presence of oxygen) to
release energy, carbon dioxide and water.
Name:______________________________
Period:_____
Date:______________
9.) The Law of Conservation of Matter states that matter cannot be created or
destroyed; it can only be rearranged. Explain how the chemical equations
for photosynthesis and cellular respiration illustrate this.
The reactants in each reaction are simply rearranged to produce the
products. No matter disappears or appears.
10.)
Starting with the sun, explain how energy flows through
photosynthesis and cellular respiration.
The sun’s energy gets stored in glucose through photosynthesis. Plants and
animals (and other living things) break the glucose down through cellular
respiration to get energy. The energy is used up in all the different things
living organisms do to stay alive.
11.)
Why is it that we die without oxygen? What do your cells do with
oxygen that your life depends on it?
We die because we have no way to release energy without it. No energy =
no life.
Our cells use the oxygen as part of cellular respiration, in other words as
part of breaking down glucose to get energy.
12.)
What is a calorie?
A measure of energy. In specific, the amount of energy needed to raise the
temperature of 1 gram of water by 1 degree Celsius.
13.)
How is a calorie different from a kilocalorie? Which one is used on
food labels at the store?
A calorie is 1/1000 of a kilocalorie OR 1,000 calories = 1 kilocalorie.
Food is measured in kilocalories. A candy bar with 300 Calories actually has
300,000 calories and would raise 300 kg of water one degree Celsius.
14.)
Thinking back to breathing – what is the connection between our
respiratory system and cellular respiration? (see page 956 if you need a
hint)
Our respiratory system brings in the oxygen we need for cellular respiration
and gets rid of the carbon dioxide produced by cellular respiration.
Name:______________________________
15.)
Period:_____
Date:______________
Mark “Yes” or “No” in the boxes below
Animals, Fungi,
Bacteria
Photosynthesis
NO
Respiration
Yes
Plants, other
organisms with
chlorophyll
Yes
Yes
16.)
One of the basics principles of biology is that life runs on sugar.
Apply what you have learned about photosynthesis and cell respiration to
explain what this means in your own words.
Sugar is how living things store energy and breaking it down is how they
access it. Plants convert the energy of the sun into sugar and then the
plants themselves and all other organisms ultimately use cellular
respiration to break the sugar down and get the energy needed to live.