Cellular Respiration pt 1

Question 1

What do all living things do with energy?

Answer 1

obtain and use it

Question 2

How do they obtain energy?

Answer 2

eating organic molecules or making organic molecules by photosynthesis

Question 3

How do they use energy?

Answer 3

aerobic cellular respiration that requires oxygen or anaerobic cellular respiration that does not require oxygen

Question 4

In simple terms, how would you describe the process of cellular respiration?

Answer 4

it is the process by which all cells break the chemical bonds found between the atoms of organic compounds and produce ATP (cellular energy)

Question 5

How are the reactions of photosynthesis and cellular respiration different?

Answer 5

photosynthesis - energy stored

cellular respiration - energy released

Question 6

What is the formula of cellular respiration?

Answer 6

6O2 + C6H12O6 yields 6CO2 + 6H20 + ATP

Question 7

How do cells make ATP?

Answer 7

they use the chemical energy stored in food to attach a phosphate group to ADP
Energy + ADP + P yields ATP

Question 8

What do cells have to do when the want to use the energy?

Answer 8

they break the bond holding the last phosphate group of the ATP molecule, and energy is released

Question 9

Why would cells need the energy released?

Answer 9

its needed to do work for the cell

Question 10

What are the two stages of cellular respiration?

Answer 10

glycolysis and aerobic respiration

Question 11

Where does glycolysis occur?

Answer 11

in the cytosol of the cell

Question 12

What molecules are needed to start the glycolysis?

Answer 12

two ATPs and one glucose

Question 13

What does glucose produce after it undergoes its chemical reactions?

Answer 13

two pyruvic acids and four ATPs

2ATP + 1 glucose yields 2 pyretic acids + 4ATP

Question 14

What is the net gain of ATP after glycolysis?

Answer 14

two

Question 15

What is NAD+ changed into in glycolysis?

Answer 15

NADH, the high energy form

Question 16

Next, where would the NADH and pyruvic acids go if oxygen was present ?

Answer 16

into the mitochondria for aerobic respiration

Question 17

Where would they go if oxygen was absent?

Answer 17

they would remain in the cytosol and undergo anaerobic respiration called fermentation

Question 18

Where does aerobic respiration occur?

Answer 18

in the mitochondrial matrix

Question 19

What is produced in the Kreb’s cycle?

Answer 19

2 ATPs, more high energy NADH, and the waste product C02

Question 20

Where does the NADH from glycolysis donate its high energy electrons?

Answer 20

to the folded inner mitochondrial membrane called the cristae

Question 21

What happens to NADH after it has donated its high energy electrons?

Answer 21

it becomes NAD+ again and is recycled back into the cytosol to be used again in glycolysis

Question 22

How do the high energy electrons from NADH travel through the cell?

Answer 22

along the cristae through a series of proteins in what is called the electron transport chain

Question 23

How is ATP made in the Kreb’s cycle?

Answer 23

When the electrons are passed from one protein to the next, they give up a bit of energy which is used to create ATP

Question 24

How many ATPs are produced at the end?

Answer 24

32-34

Question 25

How is H20 produced?

Answer 25

when the electrons have given up all the energy brought from glycolysis and Kreb’s, they, along with H+ ions attach to an oxygen to form H20.

Question 26

Why do we have to breath oxygen?

Answer 26

the oxygen serves as the final electron acceptor in the electron transport chain