Cellular respiration test questions
- What is the name of the high-energy molecule used by cells?
- Glycolysis occurs in which part of the cell?
- During glycolysis, glucose is split into two molecules of what?
- If oxygen is not present, pyruvate molecules undergo what?
- The diagram shows the citric acid cycle.
How does cellular respiration Work AP Bio?
AP Biology 🧬 Cellular Respiration is a chemical process with the following equation: C6H12O6 + O2 → H2O + CO2. The overall reaction breaks down a carbohydrate, most frequently modeled by glucose, and converts the energy stored in that molecule into the most basic cellular energy, ATP.
Which phase of cellular respiration occurs in the cytoplasm whether oxygen is present or not?
glycolysis
Stage one of cellular respiration is glycolysis. Glycolysis is the splitting, or lysis of glucose. Glycolysis converts the 6-carbon glucose into two 3-carbon pyruvate molecules. This process occurs in the cytoplasm of the cell, and it occurs in the presence or absence of oxygen.
Which of the following reflects a function of fermentation?
Which of the following reflects a function of fermentation? Explanation: Fermentation oxidizes molecules of NADH to NAD+ so the cell can have oxidizing agents for any subsequent glycolysis reactions. Fermentation leads to the production of ethanol in yeast cells and lactic acid in muscle cells.
What does cellular respiration produce?
During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.
How do you test cellular respiration?
Measuring Respiration Scientists can measure the rate of cellular respiration using a respirometer by assessing the rate of exchange of oxygen.
How is CO2 produced in cellular respiration?
How fast does cellular respiration occur?
It is very hard to quantify and say exactly how long it takes for one round of cellular respiration. We do know that it occurs very quickly. Cells do not stockpile ATP which means that as soon as ATP is used up more needs to be made. Cellular respiration, more than likely, occurs in milliseconds.
Why does fermentation supply less energy than cellular respiration?
In the absence of oxygen, some organisms go through a process called fermentation, which allows them to produce energy under anaerobic conditions. Fermentation produces relatively less energy than respiration, because fermentation does not result in the complete oxidation of glucose.
How is lactic acid formed?
Lactic acid is mainly produced in muscle cells and red blood cells. It forms when the body breaks down carbohydrates to use for energy when oxygen levels are low. Times when your body’s oxygen level might drop include: During intense exercise.
What are the 4 stages of cellular respiration?
Glycolysis
What is cellular respiration and why is it important?
Cellular respiration is important because it provides the energy for living organisms to perform all of the other necessary functions to maintain life. Most single-celled organisms, such as bacteria, do not require much energy and are able to survive on glycolysis and fermentation.
What are the four steps in cellular respiration?
In chronological order, the four steps of cellular respiration are glycolysis, a transition reaction, the Krebs Cycle and an electron transport chain.
What are the main processes of cellular respiration?
Glycolysis pathway (Embden–Meyerhof pathway)
