Respiration Flashcards
What is glycolysis?
Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH in the process.
True or False: Glycolysis occurs in the mitochondria of the cell.
False: Glycolysis occurs in the cytoplasm of the cell.
Fill in the blank: The net gain of ATP molecules from one molecule of glucose during glycolysis is _____ ATP.
2 ATP
Which molecule is the end product of glycolysis?
Pyruvate
What is the primary purpose of the Krebs cycle?
To produce energy through the oxidation of acetyl-CoA.
True or False: The Krebs cycle occurs in the cytoplasm of prokaryotic cells.
False; it occurs in the mitochondria of eukaryotic cells.
What molecule initiates the Krebs cycle by combining with oxaloacetate?
Acetyl-CoA
Which gas is produced as a byproduct during the Krebs cycle?
Carbon dioxide
What are the main energy carriers produced in one turn of the Krebs cycle?
NADH, FADH2, and ATP (or GTP)
Multiple Choice: Which of the following is NOT a product of the Krebs cycle? A) NADH B) FADH2 C) Glucose D) CO2
C) Glucose
How many times does the Krebs cycle turn for each molecule of glucose metabolized?
Two times
True or False: The Krebs cycle is part of aerobic respiration.
True
What is the primary function of the link reaction in cellular respiration?
To convert pyruvate into acetyl-CoA and produce NADH.
True or False: The link reaction occurs in the cytoplasm.
False, it occurs in the mitochondria.
What molecule is produced during the link reaction that is essential for the Krebs cycle?
Acetyl-CoA.
Fill in the blank: The link reaction involves the decarboxylation of ________.
Pyruvate.
What is the role of NAD+ in the link reaction?
It acts as an electron carrier and is reduced to NADH.
During oxidative phosphorylation, what is the final electron acceptor?
Oxygen.
Multiple choice: Which of the following processes produces ATP? A) Glycolysis B) Link Reaction C) Oxidative Phosphorylation D) All of the above
C) Oxidative Phosphorylation.
What is chemiosmosis?
The process by which ATP is produced using the energy from the proton gradient across the mitochondrial membrane.
True or False: ATP synthase is an enzyme involved in oxidative phosphorylation.
True.
What is the main purpose of the electron transport chain in oxidative phosphorylation?
To transfer electrons and create a proton gradient.
Fill in the blank: The proton gradient created during oxidative phosphorylation is used to drive ________ synthesis.
ATP.
What is produced as a byproduct of oxidative phosphorylation?
Water.
Multiple choice: Which of the following is NOT a product of the link reaction? A) Acetyl-CoA B) NADH C) Carbon Dioxide D) Glucose
D) Glucose.
Describe the role of coenzyme A in the link reaction.
Coenzyme A helps transport the acetyl group into the Krebs cycle.
True or False: The link reaction occurs before glycolysis.
False, it occurs after glycolysis.
What happens to the carbon dioxide produced during the link reaction?
It is released as a waste product.
Fill in the blank: The energy released during the electron transport chain is used to pump protons from the ________ into the intermembrane space.
Mitochondrial matrix.
Where does oxidative phosphorylation occur
membrane of cristae (mitochondria)
