Lecture 2: 11/30/22

Question 1

What is the definition of cellular respiration?

Answer 1

The metabolic harvest of energy by oxidation.

Question 2

What chemical process “runs the show” regarding the process of cellular respiration?

Answer 2

Redox Reaction

Question 3

What is the one main difference between the processes of aerobic and anaerobic respiration discussed in class?

Answer 3

If oxygen is present then you do aerobic if there is no oxygen then you do anaerobic respiration

Question 4

Fermentation is a type of _______________ respiration and takes place when the final electron acceptor is an/a __________ molecule. Fill in the blanks

Answer 4

anaerobic, organic

Question 5

What is the overall equation of aerobic cellular respiration?

Answer 5

C6H12O6 + 6O2 → 6CO2 +6H2O + ATP

Question 6

Why is cellular respiration considered a catabolic process?

Answer 6

Because you are trying to make ATP by breaking bonds.

Question 7

What takes place when one says “substrate-level phosphorylation” has occurred?

Answer 7

Simply means taking something that’s not considered energy and then creating it with the help of enzymes

Question 8

Glycolysis is the first process which occurs during cellular respiration. Where in the cell does this process take place?

Answer 8

Cytoplasm

Question 9

Glycolysis is the first process which occurs during cellular respiration. What is the overall equation of this process?

Answer 9

Glucose(6C) → 2 pyruvates (3C + 3C) + 2 ATP + 4NADH

Question 10

After glycolysis occurs within an organism, what are the two possible processes which can occur afterwards? The presence of what molecule decides which process will take place?

Answer 10

Aerobic or Anaerobic Respiration, depending on if oxygen is present or not

Question 11

What is the overall equation for pyruvate oxidation?

Answer 11

Pyruvate (3C) → Co2 (1C) + 2 Acetyl-CoA (2C coenzyme) + NADH

Question 12

What is the overall equation for the Krebs cycle?

Answer 12

Acetyl - CoA → Co2 + ATP + NADH + FADH2

Question 13

What is the overall equation for the ETC (electron transport chain)?

Answer 13

NADH + FADH2 → H2O + ATP (very concentrated) + NAD +FAD

Question 14

Anaerobic respiration can have many different types of final electron acceptors by the end of this metabolic pathway. What are some examples?

Answer 14

a. Methanogens
b. Sulfur bacteria
c. Lactic Acid / Ethanol

Question 15

Which of these statements describe the reactants and products of the first step called glucose priming?

Answer 15

2 things bond together to produce diphosphate, not split until cleavage (step 2). The word glucose is a sign that you start and end up with 6 carbon sugars.

Question 16

Which of these statements describe the reactants and products of the second step called cleavage and rearrangement?

Answer 16

split the 6 Carbon sugars in two and cut it. A little bit of energy (ATP) is required to begin the process.

Question 17

Which of these statements describe the reactants and products of the third step called oxidation?

Answer 17

removing hydrogen to make NADH

Question 18

Which of these statements describe the reactants and products of the fourth step called ATP generation?

Answer 18

2G3P → 4ATP + 2 pyruvates (3 carbon each)