Unit 5 Lesson 7: Cellular Respiration and MAtter

Question 1

Where do animals get there enrgy

Answer 1

In animals, energy comes from the food they eat.

Question 2

Wherre do palnts store energy

Answer 2

In plants, energy comes from the sugars stored within the tissues.

Question 3

Where is enrgy stored in animals and how si the energy relased

Answer 3

Energy is stored within the chemical bonds of food molecules. This chemical energy is released when the chemical bonds are broken.

Question 4

What is cellular respiration

Answer 4

Cellular respiration is the process of combining food molecules with oxygen and using the chemical energy from these molecules to power all the activities that sustain life.

Question 5

What do both animal and plant cells have

Answer 5

Remember that animal and plant cells both have cytoplasm and mitochondria.

Question 6

What is Cytoplasm

Answer 6

Cytoplasm is a thick solution, made up of water, salts and proteins, that fills each cell and is within the cell membrane.

Question 7

What is mitochondria

Answer 7

The mitochondria are membrane bound organelle that make most of the chemical energy needed to power the cell.

Question 8

Where does cellular respiration happen

Answer 8

Cellular respiration takes place in the cytoplasm and the mitochondria of each cell.

Question 9

What does cellular respiration use and do

Answer 9

Cellular respiration uses matter from the food we eat and oxygen from the atmosphere to fuel our bodies.

Question 10

What are the porducts of cellular respiration

Answer 10

The products of cellular respiration are water, carbon dioxide and energy stored as ATP, a molecule that stores energy in its bonds.

Question 11

What is ATP

Answer 11

adenosine tri-phosphate; a molecule that carries energy inside cells; the energy currency of a cell

Question 12

Where is ATP stored

Answer 12

ATP is stored in the mitochondria until it is needed by the cell.

Question 13

There are many reactions and steps in the process of cellular respiration. The process can best be modeled with this equation:

Answer 13

C6H12O6 + 6O2 → 6H2O + 6CO2 + Energy
In words, the equation says:

glucose + oxygen → water + carbon dioxide + energy

Question 14

What are the reactants and products of cellular respiration

Answer 14

The reactants are oxygen and, in this case, a sugar called glucose that came from food. The products of the reaction are water, carbon dioxide, and energy.

Question 15

How is enrgy ffrom food relased

Answer 15

Energy from food is released in small amounts in the form of ATP.

Question 16

What usable energy is made during cellular respiration?

Answer 16

The energy made is ATP.

Question 17

Draw a model for cellular respiration showing the inputs and outputs.

Answer 17

C6 H12O6 + 6O2 → 6H2O + 6CO2 + Energy

Question 18

What does 6H2O
represent in the chemical equation for cellular respiration?

Answer 18

It represents six water molecules.

Question 19

What are calories

Answer 19

The energy stored in food is measured in units called calories

Question 20

What does one calorie mean

Answer 20

One calorie is the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius

Question 21

What is a Calorie

Answer 21

A Calorie is the same as 1000 calories.

Question 22

How can cells use molecles

Answer 22

Cells can use these types of molecules as fuel. Each type of molecule stores the calories in chemical bonds.

Question 23

Do moleclues stores differnt numbers of claoreis?

Answer 23

Because each molecule has a different chemical structure, they store a different number of calories.

Question 24

How many calories from one gram of glucose

Answer 24

For example, one gram of glucose releases about 4000 calories (4 Calories) of heat energy when it is burned.

Question 25

Calaoreis relasied from one gram of chicken

Answer 25

One gram of chicken also releases about 4000 calories (4 Calories) of heat energy when burned.

Question 26

Calories relased from one gram of butter

Answer 26

Fats have a higher amount of energy. One gram of fat (such as butter) releases about 9000 calories (9 Calories) of heat energy when burned.

Question 27

A serving of chicken is about 113 grams and is mostly protein. How many Calories are in that serving of chicken?

Answer 27

Grams × Calories/gram = Calories 113 x 4 = 452 Calories

Question 28

Which has more stored energy, a kilogram of butter or a kilogram of lean beef?

Answer 28

A kilogram of butter has more stored energy, at 9000 Calories than a kilogram of lean beef, at 4000 Calories, because fats have 9 Cal/gram and proteins have 4 Cal/gram.