Cellular Respiration

Question 0

Cellular respiration definition

Answer 0

The aerobic harvesting of chemical energy from organic fuel molecules

Question 1

What does a cell require to break down its fuel?

Answer 1

Oxygen

Question 2

Cellular respiration requires a cell to…

Answer 2

Exchange two gases with its surroundings

Question 3

The cell takes in ______, and gets rid of waste in the form of ________.

Answer 3

Oxygen, carbon dioxide

Question 4

What is the common fuel molecule for cellular respiration?

Answer 4

Glucose

Question 5

How many ATP molecules can be produced from one glucose molecule through cellular respiration?

Answer 5

38

Question 6

During cellular respiration hydrogen and its bonding electron change partners from….

Answer 6

Sugar to oxygen, forming water as a product

Question 7

What is a redox reaction?

Answer 7

A chemical reaction that transfers electrons from one substance to another substance

Question 8

What is redox reaction short for?

Answer 8

Oxidation-reduction reaction

Question 9

What is the loss of electrons during a redox reaction called?

Answer 9

Oxidation

Question 10

What is the acceptance of electrons during a redox reaction called?

Answer 10

Reduction

Question 11

What does oxygen accept during cellular respiration?

Answer 11

Electrons and hydrogen lost from glucose

Question 12

What does an oxygen atom attract more strongly than almost any other type of atom?

Answer 12

Electrons

Question 13

When electrons move from glucose to oxygen, ________ energy is released.

Answer 13

Potential

Question 14

What does it mean when an electron “falls”?

Answer 14

It’s energy is released explosively in the form of heat and light

Question 15

Redox reactions also releases a large amount of energy as the electrons of the hydrogen _____ into their new bonds with oxygen.

Answer 15

Fall

Question 16

Cellular respiration unlocks chemical energy in ________ _________ that cells can put to productive use.

Answer 16

Smaller amounts

Question 17

The first stop on the path electrons take on their way down from glucose to oxygen is

Answer 17

A positively charged electron acceptor called NAD+

Question 18

What does the transfer of electrons rom organic fuel to NAD+ reduce NAD+ to?

Answer 18

NADH

Question 19

What is each link in the electron transport chain?

Answer 19

A molecule, usually a protein

Question 20

Using a series of redox reactions, what does each member of the electron transport chain do?

Answer 20

First accepts and then donates electrons

Question 21

What do the electrons do during each transfer?

Answer 21

Give up a small amount of energy that can be used to generate ATP from ADP

Question 22

The first molecule of the chain accepts electrons from…

Answer 22

NADH

Question 23

NADH carries electrons from glucose and other fuel molecules and deposits them….

Answer 23

At the top of an electron transport chain

Question 24

The electrons at the top of an electrons transport chain...

Answer 24

Cascade down the chain from molecule to molecule

Question 25

The molecule at the bottom of the chain...

Answer 25

"drops" the electrons to oxygen. The oxygen also picks up one hydrogen, forming water.

Question 26

Oxygen is an electron...

Answer 26

"Grabber" that drives the cascade of electrons "downhill"

Question 27

Metabolism is the general term...

Answer 27

For all chemical processes that occur in cells

Question 28

How many reactions are involved in cellular respiration?

Answer 28

More than two dozen

Question 29

What are the three main metabolic stages?

Answer 29

Glycolysis, the citric acid cycle, and electron transport

Question 30

What happens to a molecule of glucose during glycolysis?

Answer 30

A molecule of glucose is split into two molecules of pyruvic acid

Question 31

Where are the enzymes for glycolysis located?

Answer 31

The cytosol of the cell

Question 32

The citric acid cycle/Krebs cycle completes the breakdown of...

Answer 32

Sugar all the way to carbon dioxide, the waste product of cellular respiration

Question 33

The enzymes for the citric acid cycle are dissolved in...

Answer 33

The fluid within the mitochondria

Question 34

What do glycolysis and the citric acid cycle generate a small amount of directly?

Answer 34

ATP

Question 35

How do glycolysis and the citric acid cycle generate more ATP indirectly?

Answer 35

Through redox reactions

Question 36

Where are the proteins and other molecules that make up electron transport chains embedded?

Answer 36

Within the membrane of the mitochondria

Question 37

Where does most of the energy your cells use to make ATP come from?

Answer 37

The electron transport chain