Cellular Respiration Quiz

Question 1

Organisms that perform photosynthesis

Answer 1

Plants, algae, and certain types of bacteria

Question 2

Products of Photosynthesis

Answer 2

Glucose (C6H12O6) and Oxygen (O2)

Question 3

Reactants of photosynthesis

Answer 3

Carbon dioxide and water

Question 4

What is the purpose of photosynthesis

Answer 4

change the energy in sunlight to kinds of energy that can be stored for later use

Question 5

Organisms that perform cellular respiration

Answer 5

all living things

Question 6

Products of cellular respiration

Answer 6

Carbon Dioxide, water and ATP

Question 7

Reactants of cellular respiration

Answer 7

Glucose, Oxygen

Question 8

describe the purpose of cellular respiration

Answer 8

to generate usable energy in the form of ATP (adenosine triphosphate) by breaking down glucose molecules

Question 9

what is the purpose of glycolysis

Answer 9

breaks down glucose to from two pyruvates which are then used in the krebs cycle

Question 10

where does glycolysis take place

Answer 10

cytosol

Question 11

what reactant is used during glycolysis

Answer 11

glucose, 2 ATP and 2 NAD+

Question 12

What products are formed during glycolysis

Answer 12

two pyruvate molecules, two ATP molecules, and two NADH molecules

Question 13

Describe the first step in glycolysis

Answer 13

1) Energy investment phase: 2 ATP added to glucose, glucose splits into 2 3-carbon molecules, enzymes rearrange these molecules.

Question 14

Describe the 2nd step in glycolysis

Answer 14

2) Energy payoff phase: Electrons from the 2 3-carbon molecules are transferred to 2 NAD+, forming 2NADH, more reactions convert the 2 3-carbon molecules into 2 pyruvate, 4 ATP is made.

Question 15

Describe the 3rd step in glycolysis

Answer 15

3) Products: 2 NADH move into mitochondria to go to the ETC, net 2 ATP are produced, 2 Pryuvate move into Krebs cycle.

Question 16

Describe the purpose of the krebs cycle

Answer 16

Produce electron carriers/energy carrying molecules which are transferred to the final stage of cellular respiration

Question 17

Where does the krebs cycle take place

Answer 17

The matrix of mitochondria

Question 18

What reactants are used in the krebs cycle

Answer 18

acetyl-CoA and oxaloacetate

Question 19

What are the products of the krebs cycle

Answer 19

ATP, NADH, FADH2, CO2 (waste product) and Water

Question 20

Describe what happens in the pre-krebs cycle

Answer 20

Pyruvate is broken down to acetyl (2 carbon mol.). During the breakdown: CO2 is released from each pyruvate. the NADH produced goes to final stage. CoA bonds to acetyl and helps acetyl move into krebs cycle

Question 21

Describe the steps in the Krebs Cycle

Answer 21

Acetyl drops CoA and enters the cycle and is added to a 4-carbon molecule forming citric acid. A series of steps break down citric acid, stripping some electrons and transferring them to NAD+ to form NADH and FADH2. carbon atoms are lossed during this to form CO2.

Question 22

purpose of the electron transport chain

Answer 22

generate a cheiosmotic gradient across the membrane and make a lot of ATP

Question 23

location of the ETC

Answer 23

on and across the inner membrane of the mitochondria

Question 24

Reactants used in the ETC

Answer 24

NADH and FADH2

Question 25

Products formed in the ETC

Answer 25

Water and ATP

Question 26

Describe the 1st step of the ETC

Answer 26

1) proteins that make up the ETC take high energy electrons from NADH and FADH2

Question 27

Describe the 2nd step in the ETC

Answer 27

2) electrons are passed from protein to protein in ETC. At each transfer, energy is released. That energy is used to pump H+ against the gradient. The energy passed is used to run a protein pump. A chemiosmotic gradient is produced, H+ build up and store potential energy.

Question 28

describe the 3rd step in the ETC

Answer 28

3) H+ flows through the the ATP synthase enzyme, powers the enzyme which adds a phosphate to ADP to form ATP.

Question 29

describe the 4th step in the ETC

Answer 29

4) Oxygen inside the matrix is the final electron acceptor in the ETC. It picks up an e- at the end of the chain and bonds with hydrogen ions to form water. Forms around 34 ATP per glucose.

Question 30

How does glycolysis depend on the other stages?

Answer 30

This initial stage breaks down glucose into pyruvate, producing a small amount of ATP and generating NADH, which are then used in the subsequent Krebs cycle.

Question 31

How does the pre-krebs cycle depend on the other stages?

Answer 31

Pyruvate from glycolysis is converted into acetyl-CoA, which is the molecule that enters the Krebs cycle, making this step essential for the continuation of the process.

Question 32

How does the krebs cycle depend on the other stages?

Answer 32

Acetyl-CoA from the pre-krebs cycle combines with a four-carbon molecule to generate further energy carriers like NADH, FADH2, and ATP, while releasing carbon dioxide.

Question 33

How does the ETC depend on the other stages?

Answer 33

The NADH and FADH2 produced in the previous stages deliver electrons to the electron transport chain, which uses their energy to pump protons across the mitochondrial membrane, ultimately generating a large amount of ATP through chemiosmosis.

Question 34

What organisms perform photosynthesis

Answer 34

Plants, bacteria. fungi

Question 35

What reactants are used in photosynthesis

Answer 35

Carbon dioxide and water

Question 36

What products are produced in photosynthesis

Answer 36

Oxygen, glucose and ATP

Question 37

what is the purpose of photosynthesis

Answer 37

change the energy in sunlight to kinds of energy that can be stored for later use

Question 38

What is the purpose of fermentation

Answer 38

It allows the production of a small amount of ATP without oxygen

Question 39

Where does fermentation take place

Answer 39

cytosol

Question 40

Summary of what happens in fermentation

Answer 40

it deals with NADH and pyruvate to form energy. Glycolysis plus reactions that regenerate NAD+, which can be reused by glycolysis. NADH converts back to NAD+ which can make more energy.

Question 41

Summary of what alcohol fermentation does

Answer 41

Pyruvate converted to ethanol in 2 steps, one step releases CO2

Question 42

Summary of lactic acid fermentation

Answer 42

pyruvate converted to lactate as a waste product.