Exam 2 Cell Respiration Flashcards
What is the primary purpose of cellular respiration?
To convert biochemical energy from nutrients into adenosine triphosphate (ATP).
True or False: Cellular respiration occurs only in the presence of oxygen.
False.
Fill in the blank: The three main stages of cellular respiration are ________, Krebs cycle, and electron transport chain.
glycolysis
What is the main product of glycolysis?
Pyruvate.
Which molecule acts as the final electron acceptor in aerobic respiration?
Oxygen.
Multiple Choice: Which of the following is NOT a product of the Krebs cycle? A) ATP B) NADH C) FADH2 D) Glucose
D) Glucose.
What is the net gain of ATP molecules from one molecule of glucose during glycolysis?
2 ATP.
True or False: Lactic acid fermentation occurs in muscle cells when oxygen is scarce.
True.
What is the primary role of NAD+ in cellular respiration?
To act as an electron carrier.
Fill in the blank: The process of converting glucose into pyruvate is called ________.
glycolysis
Name the cycle that produces carbon dioxide as a waste product.
Krebs cycle.
Multiple Choice: How many ATP molecules can be produced from one molecule of glucose during aerobic respiration? A) 2 B) 18 C) 36 D) 38
C) 36.
What are the two types of fermentation?
Lactic acid fermentation and alcoholic fermentation.
True or False: The electron transport chain occurs in the mitochondria.
True.
What is the role of ATP synthase in cellular respiration?
To synthesize ATP from ADP and inorganic phosphate.
Fill in the blank: In the absence of oxygen, cells can perform ________ to produce energy.
fermentation
What are the end products of alcoholic fermentation?
Ethanol and carbon dioxide.
Multiple Choice: Which of the following processes generates the most ATP? A) Glycolysis B) Krebs Cycle C) Electron Transport Chain D) Fermentation
C) Electron Transport Chain.
What is oxidative phosphorylation?
The process of ATP generation that occurs during the electron transport chain.
True or False: The Krebs cycle occurs in the cytoplasm of prokaryotic cells.
False.
What is produced during the decarboxylation of pyruvate?
Acetyl-CoA and carbon dioxide.
Fill in the blank: The energy currency of the cell is ________.
ATP
What is the total yield of NADH from one turn of the Krebs cycle?
3 NADH.
Multiple Choice: Which of the following is a byproduct of aerobic cellular respiration? A) Oxygen B) Glucose C) Carbon dioxide D) Lactic acid
C) Carbon dioxide.
True or False: The main function of the electron transport chain is to produce heat.
False.
What is the significance of the proton gradient in cellular respiration?
It drives the synthesis of ATP via ATP synthase.
