Bio 101 ATP and Energy Currency
39 flashcards covering Bio 101 ATP and Energy Currency for the BIOLOGY-101 Energy & Metabolism section.
The topic of ATP (adenosine triphosphate) as the energy currency of the cell is fundamental in understanding energy transfer and metabolism in biological systems. This concept is outlined in the curriculum for Introductory Biology I, which emphasizes the role of ATP in cellular processes and its importance in bioenergetics. ATP is produced through cellular respiration and photosynthesis, making it a key focus in both plant and animal biology.
On practice exams and competency assessments, questions about ATP often focus on its structure, synthesis, and role in energy transfer. Common question styles include multiple-choice and short answer formats, where candidates may be asked to identify the processes that generate ATP or explain how ATP facilitates cellular activities. A frequent pitfall is confusing the processes of ATP production, such as oxidative phosphorylation and substrate-level phosphorylation, leading to incorrect answers regarding energy yield or the conditions under which these processes occur.
One practical tip to remember is that understanding the relationship between ATP and metabolic pathways can clarify complex concepts in energy metabolism.
Terms (39)
- 01
What is ATP and its role in cellular metabolism?
ATP, or adenosine triphosphate, is the primary energy carrier in cells, providing energy for various biochemical reactions and processes (Campbell Biology, energy chapter).
- 02
How is ATP synthesized during cellular respiration?
ATP is synthesized primarily through oxidative phosphorylation in the mitochondria and substrate-level phosphorylation during glycolysis and the Krebs cycle (Campbell Biology, cellular respiration chapter).
- 03
What is the structure of ATP?
ATP consists of an adenosine molecule bonded to three phosphate groups, which are key to its role in energy transfer (Campbell Biology, energy chapter).
- 04
What is substrate-level phosphorylation?
Substrate-level phosphorylation is a direct method of synthesizing ATP by transferring a phosphate group from a substrate to ADP, occurring in glycolysis and the Krebs cycle (Campbell Biology, glycolysis chapter).
- 05
How many ATP molecules are produced from one glucose molecule during glycolysis?
Glycolysis produces a net gain of 2 ATP molecules per glucose molecule, after accounting for the 2 ATP used in the preparatory phase (Campbell Biology, glycolysis chapter).
- 06
What is oxidative phosphorylation?
Oxidative phosphorylation is the process of ATP production that occurs in the mitochondria, driven by the electron transport chain and chemiosmosis (Campbell Biology, cellular respiration chapter).
- 07
What role do electron carriers play in ATP production?
Electron carriers like NADH and FADH2 transport electrons to the electron transport chain, facilitating ATP production through oxidative phosphorylation (Campbell Biology, cellular respiration chapter).
- 08
What is the energy yield of the Krebs cycle per glucose molecule?
The Krebs cycle yields 2 ATP, along with electron carriers NADH and FADH2, per glucose molecule processed (Campbell Biology, Krebs cycle chapter).
- 09
What is the function of ATP synthase?
ATP synthase is an enzyme that synthesizes ATP from ADP and inorganic phosphate during oxidative phosphorylation, utilizing the proton gradient created by the electron transport chain (Campbell Biology, cellular respiration chapter).
- 10
How does the proton gradient contribute to ATP production?
The proton gradient created by the electron transport chain drives protons back into the mitochondrial matrix through ATP synthase, facilitating ATP synthesis (Campbell Biology, cellular respiration chapter).
- 11
What is the main difference between aerobic and anaerobic respiration?
Aerobic respiration requires oxygen and produces more ATP, while anaerobic respiration occurs without oxygen and yields less ATP (Campbell Biology, cellular respiration chapter).
- 12
What is fermentation and when does it occur?
Fermentation is an anaerobic process that allows for ATP production without oxygen, typically occurring in muscle cells during intense exercise or in yeast (Campbell Biology, fermentation chapter).
- 13
What are the end products of alcoholic fermentation?
Alcoholic fermentation produces ethanol and carbon dioxide as end products, along with a small amount of ATP (Campbell Biology, fermentation chapter).
- 14
What is the significance of the electron transport chain?
The electron transport chain is crucial for ATP production, as it transfers electrons and pumps protons to create a gradient used by ATP synthase (Campbell Biology, cellular respiration chapter).
- 15
How many ATP are produced during the complete oxidation of one glucose molecule?
The complete oxidation of one glucose molecule can yield up to 30-32 ATP, depending on the efficiency of the electron transport chain (Campbell Biology, cellular respiration chapter).
- 16
What is the role of coenzymes in metabolism?
Coenzymes, such as NAD+ and FAD, assist enzymes in catalyzing reactions by carrying electrons and protons during metabolic processes (Campbell Biology, metabolism chapter).
- 17
What is the purpose of the preparatory phase in glycolysis?
The preparatory phase of glycolysis invests energy to convert glucose into a more reactive form, ultimately leading to ATP production in the payoff phase (Campbell Biology, glycolysis chapter).
- 18
What is chemiosmosis?
Chemiosmosis is the movement of protons across a membrane, driving ATP synthesis as protons flow back into the mitochondrial matrix through ATP synthase (Campbell Biology, cellular respiration chapter).
- 19
What are the two main types of phosphorylation involved in ATP production?
The two main types of phosphorylation are substrate-level phosphorylation and oxidative phosphorylation, both contributing to ATP synthesis (Campbell Biology, cellular respiration chapter).
- 20
What is the role of oxygen in aerobic respiration?
Oxygen serves as the final electron acceptor in the electron transport chain, allowing for the efficient production of ATP (Campbell Biology, cellular respiration chapter).
- 21
How does lactic acid fermentation differ from alcoholic fermentation?
Lactic acid fermentation produces lactic acid as a byproduct, while alcoholic fermentation produces ethanol and carbon dioxide (Campbell Biology, fermentation chapter).
- 22
What is the function of NADH in cellular respiration?
NADH functions as an electron carrier, transporting electrons to the electron transport chain for ATP production (Campbell Biology, cellular respiration chapter).
- 23
What happens to the energy stored in ATP when it is hydrolyzed?
When ATP is hydrolyzed, it releases energy that can be used for cellular work, converting ATP to ADP and inorganic phosphate (Campbell Biology, energy chapter).
- 24
What is the role of the mitochondrial membrane in ATP production?
The mitochondrial membrane houses the electron transport chain and ATP synthase, crucial for ATP production through oxidative phosphorylation (Campbell Biology, cellular respiration chapter).
- 25
What is the significance of the Krebs cycle in metabolism?
The Krebs cycle is significant for generating electron carriers and ATP, as well as providing intermediates for other metabolic pathways (Campbell Biology, Krebs cycle chapter).
- 26
How do high-energy electrons contribute to ATP synthesis?
High-energy electrons from NADH and FADH2 are transferred through the electron transport chain, driving proton pumping and ATP synthesis (Campbell Biology, cellular respiration chapter).
- 27
What is the net gain of ATP from fermentation?
Fermentation typically results in a net gain of 2 ATP per glucose molecule, produced through substrate-level phosphorylation (Campbell Biology, fermentation chapter).
- 28
What is the relationship between ATP and ADP?
ATP (adenosine triphosphate) can be converted to ADP (adenosine diphosphate) by losing a phosphate group, releasing energy for cellular processes (Campbell Biology, energy chapter).
- 29
What is the role of FADH2 in cellular respiration?
FADH2 acts as an electron carrier, donating electrons to the electron transport chain and contributing to ATP production (Campbell Biology, cellular respiration chapter).
- 30
How does the body utilize ATP during muscle contraction?
During muscle contraction, ATP is hydrolyzed to provide the energy needed for the interaction of actin and myosin filaments (Campbell Biology, muscle physiology chapter).
- 31
What is the role of the inner mitochondrial membrane?
The inner mitochondrial membrane contains the proteins of the electron transport chain and ATP synthase, essential for ATP production (Campbell Biology, cellular respiration chapter).
- 32
What is the function of the citric acid cycle?
The citric acid cycle, also known as the Krebs cycle, functions to oxidize acetyl-CoA, producing ATP, NADH, and FADH2 (Campbell Biology, Krebs cycle chapter).
- 33
How do uncouplers affect ATP production?
Uncouplers disrupt the proton gradient in mitochondria, reducing ATP production while allowing electron transport to continue (Campbell Biology, cellular respiration chapter).
- 34
What is the importance of glucose in cellular respiration?
Glucose is a primary substrate for cellular respiration, providing the carbon skeleton and energy needed for ATP production (Campbell Biology, cellular respiration chapter).
- 35
How does the body replenish ATP during exercise?
The body replenishes ATP during exercise through anaerobic pathways like fermentation and aerobic pathways like oxidative phosphorylation (Campbell Biology, energy chapter).
- 36
What is the role of pyruvate in metabolism?
Pyruvate is a key intermediate in metabolism, serving as a substrate for both aerobic respiration and fermentation processes (Campbell Biology, glycolysis chapter).
- 37
What is the function of coenzyme A in cellular respiration?
Coenzyme A is essential for the formation of acetyl-CoA, which enters the Krebs cycle for further oxidation (Campbell Biology, cellular respiration chapter).
- 38
What are the key differences between aerobic and anaerobic pathways?
Aerobic pathways require oxygen and yield more ATP, while anaerobic pathways do not require oxygen and yield less ATP (Campbell Biology, cellular respiration chapter).
- 39
What is the significance of ATP as an energy currency?
ATP is known as the energy currency of the cell because it provides readily available energy for various cellular functions (Campbell Biology, energy chapter).