7.4 Bio Flashcards
What is the primary function of cellular respiration?
To convert glucose into ATP, the energy for cells.
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 glycolysis, the Krebs cycle, and __________.
ETC
What is glycolysis?
The process of breaking down glucose into pyruvate, producing a small amount of ATP and NADH.
Which molecule is produced during the Krebs cycle?
NADH and 2 ATP
What is the main purpose of ETC?
To produce the majority of ATP through the electron transport chain.
True or False: Fermentation occurs in the absence of oxygen.
True
What are the two main types of fermentation?
Lactic acid fermentation and alcoholic fermentation.
In lactic acid fermentation, what is produced from pyruvate?
Lactic acid
What is the net gain of ATP from glycolysis?
2 ATP
What role does oxygen play in cellular respiration?
It acts as the final electron acceptor in the electron transport chain.
What is the total yield of ATP from one molecule of glucose during aerobic respiration?
Up to 38 ATP
True or False: The electron transport chain occurs in the mitochondria.
True
What is the main difference between aerobic and anaerobic respiration?
Aerobic respiration requires oxygen, while anaerobic respiration does not.
What is produced during alcoholic fermentation?
Ethanol and carbon dioxide
Fill in the blank: The enzyme responsible for ATP synthesis in ETC is?
ATP synthase
Which process is more efficient in terms of ATP yield: fermentation or cellular respiration?
Cellular respiration
What is the primary energy carrier produced during cellular respiration?
ATP
Short Answer: What is the main purpose of the Krebs cycle?
To produce electron carriers for the electron transport chain.
What happens to pyruvate in the presence of oxygen?
It enters the Krebs cycle.
Fill in the blank: The process of converting glucose to energy in the absence of oxygen is called __________.
fermentation
True or False: The byproducts of fermentation can be harmful to cells in high concentrations.
True
