Cellular Respiration Flashcards

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Questions and Answers

Where in the cell does cellular respiration take place?

mitochondria

Write the overall chemical equation for cellular respiration. Label the reactants and products. What is the energy source for cellular respiration?

C6H12O6 + O2 ------> CO2 + H2O + ATP. The reactants are oxygen and glucose. The products are ATP, CO2, and water. The energy source is glucose molecules.

Why is it important to convert the energy in glucose into ATP molecules? Why do we need ATP?

It is important to convert the energy in glucose into ATP molecules because energy is needed to survive. We need ATP because it is the high-energy molecule that stores the energy we need to do just about everything we do.

Compare the amount of energy in the cellular respiration products compared to the cellular respiration reactants.

The amount of energy in the products is the same as the reactants because energy is released for ATP, but not destroyed. The Law of Conservation of Matter says that reactants and products must equal each other. Signup and view all the answers

Explain how photosynthesis and cellular respiration are related.

Photosynthesis and cellular respiration are related because photosynthesis converts light energy into chemical energy (sugars), which is then used in cellular respiration to produce ATP, releasing CO2 and water needed for photosynthesis. Signup and view all the answers

Photosynthesis is ENDOTHERMIC, meaning that it requires input of / to occur. Whereas cellular respiration is EXOTHERMIC, meaning the _____ of energy occurs.

energy/heat, output Signup and view all the answers

In photosynthesis, what energy is going in? How is that energy utilized?

The energy from the sun/heat energy is going in and it is utilized by the plant taking it in to break the bonds of CO2 and H2O to make sugars and oxygen. Signup and view all the answers

In cellular respiration, what energy is coming out? How is that energy utilized?

ATP is coming out and it is utilized when an organism needs to use that energy to perform daily functions. Signup and view all the answers

What is an autotroph? Give an example.

An autotroph is an organism that can produce its own food. Plants are autotrophs. Signup and view all the answers

What is a heterotroph? Give an example.

A heterotroph is an organism that gets its food from plants and other organic substances. Humans and animals are heterotrophs. Signup and view all the answers

Explain how carbon is cycled through the biosphere in relation to cellular respiration.

Cellular respiration releases carbon dioxide that is stored in the atmosphere. Signup and view all the answers

Explain how carbon is cycled through the biosphere in relation to photosynthesis.

Photosynthesis uses that stored carbon dioxide and turns it into oxygen and sugar. Signup and view all the answers

Explain how carbon is cycled through the biosphere concerning decomposers.

Decomposers break down the remains of dead plants and animals, and release carbon dioxide through respiration. Signup and view all the answers

Explain how carbon is cycled through the biosphere concerning fossil fuels.

The pressure of the layers of sediment will result in the decomposed organism becoming a liquid over a period of millions of years. These liquids are fossil fuels such as oil, coal, and gas. The fossilization has produced fossil fuels which we burn, resulting in the release of carbon dioxide. Signup and view all the answers

Explain how carbon is cycled through the biosphere concerning fuel oxidation.

A liquid or gaseous fuel is oxidized, releasing carbon dioxide. Signup and view all the answers

Explain how methane leakage affects CO2 levels.

If methane is leaked or given off from animals, CO2 levels increase. Signup and view all the answers

Study Notes

Cellular Respiration Overview

Cellular respiration occurs in the mitochondria of cells.
Overall chemical equation: C6H12O6 + O2 → CO2 + H2O + ATP
Reactants: glucose and oxygen; Products: carbon dioxide, water, and ATP.

Importance of ATP

ATP is crucial as it is the main energy carrier used by cells for various functions.
Converting glucose to ATP allows organisms to harness energy necessary for survival.

Energy Dynamics

Energy in products equals the energy in reactants, aligning with the Law of Conservation of Matter.
Energy is released during ATP production but not destroyed, demonstrating energy transformation.

Photosynthesis and Cellular Respiration Integration

Photosynthesis absorbs sunlight, CO2, and water to produce sugars and oxygen.
Cellular respiration uses those sugars and oxygen, producing ATP, CO2, and water, thus completing a matter cycling process in ecosystems.

Energy in Photosynthesis and Cellular Respiration

Photosynthesis is endothermic, requiring energy/heat input; cellular respiration is exothermic, resulting in an output of energy.
Energy from sunlight is used in photosynthesis to synthesize glucose from CO2 and water.

Autotrophs and Heterotrophs

Autotrophs, like plants, produce their own food through processes like photosynthesis.
Heterotrophs, such as humans and animals, consume organic substances for energy.

Carbon Cycling in the Biosphere

Cellular respiration releases carbon dioxide back into the atmosphere.
Photosynthesis uses atmospheric CO2 to synthesize oxygen and glucose.
Decomposers break down organic matter, releasing CO2 as they respire.
Fossilization processes convert decomposed organic material into fossil fuels (oil, coal, gas) over millions of years, which also contribute to CO2 emissions when burned.
Combustion of fossil fuels releases carbon dioxide into the atmosphere, impacting environmental carbon levels.
Methane emissions can elevate CO2 levels, illustrating the interconnectedness of biological and geological processes in carbon cycling.

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Description

Test your knowledge on cellular respiration with these flashcards covering key concepts and definitions. From the location of cellular respiration to its chemical equations, this quiz helps reinforce understanding of the cellular process that generates energy. Perfect for students studying biology or related subjects.