Cellular respiration Flashcards
What is cellular respiration?
The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.
True or False: Cellular respiration occurs in all living organisms.
True
What is the primary energy currency produced during cellular respiration?
ATP (adenosine triphosphate)
Fill in the blank: The three main stages of cellular respiration are glycolysis, the Krebs cycle, and __________.
electron transport chain
What is the main purpose of glycolysis?
To break down glucose into pyruvate and produce ATP and NADH.
Which molecule is produced during the Krebs cycle?
NADH and FADH2
Multiple choice: Which of the following is NOT a product of cellular respiration? A) ATP B) Carbon Dioxide C) Glucose D) Water
C) Glucose
True or False: The Krebs cycle occurs in the cytoplasm of cells.
False
What is the role of oxygen in cellular respiration?
Oxygen acts as the final electron acceptor in the electron transport chain.
Fill in the blank: Anaerobic respiration occurs in the absence of __________.
oxygen
What are the two types of anaerobic respiration?
Lactic acid fermentation and alcoholic fermentation.
Multiple choice: Which of the following processes produces the least amount of ATP? A) Aerobic respiration B) Anaerobic respiration C) Both produce the same amount
B) Anaerobic respiration
What is the net gain of ATP from one molecule of glucose during glycolysis?
2 ATP
True or False: Cellular respiration is an exergonic process.
True
What is the main byproduct of cellular respiration?
Carbon dioxide
Fill in the blank: The electron transport chain is located in the __________ of the mitochondria.
inner membrane
What is the function of NADH and FADH2 in cellular respiration?
They carry electrons to the electron transport chain.
Multiple choice: Which stage of cellular respiration produces the most ATP? A) Glycolysis B) Krebs cycle C) Electron transport chain
C) Electron transport chain
What is the importance of the proton gradient in the electron transport chain?
It drives ATP synthesis through chemiosmosis.
True or False: Fermentation occurs only in the presence of oxygen.
False
What is the primary purpose of the Krebs cycle?
To produce electron carriers (NADH and FADH2) for the electron transport chain.
Fill in the blank: The process of converting pyruvate into acetyl-CoA occurs before the __________.
Krebs cycle
What is the total number of ATP produced from one molecule of glucose during aerobic respiration?
Approximately 30-32 ATP
Multiple choice: Which of the following is a result of lactic acid fermentation? A) Ethanol B) Lactic acid C) Carbon dioxide
B) Lactic acid
True or False: ATP is generated during glycolysis.
True
What is the significance of cellular respiration in living organisms?
It provides energy necessary for cellular functions and metabolism.
