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Photosynthesis

This category is for questions about the chemical process in which autotrophic organisms use sunlight, carbon dioxide and water to make glucose, water and oxygen. This process is vital to life and is of great importance in biology.

6,415 Questions

What light color causes no photosynthesis?

Green light is typically the least effective color for photosynthesis as plants primarily absorb red and blue light for this process. Green light is reflected or transmitted through the plant, resulting in minimal energy being absorbed for photosynthesis.

What are the 4 methods of artificial vegetative propagation?

The three main methods would be:

rooting cuttings- simply cutting plant bits and giving the right conditions to grow roots

grafting- common in trees but used with soft tissue plants as well

tissue culture- growing plantlets from petri dish cultures, used mostly to ensure virus free plants

If a plant dont have photosynthesis will it die?

It is impossible for a plant not have photosynthesis because photosynthesis occurs in the chloroplast, in the plant cell. There are billions+ cells in a plant. But yes, because photosynthesis is the process where plants use the energy of sunlight to convert it into sugars and starches for energy.

Which cells carry out photosynthesis?

Chloroplasts in plant cells are the organelles that carry out photosynthesis. They contain chlorophyll, the pigment that captures light energy and converts it into chemical energy in the form of glucose. Only plants, algae, and some bacteria have chloroplasts and can perform photosynthesis.

What organisms use cellular respiration but not photosynthesis?

Animals, fungi, and most bacteria are examples of organisms that use cellular respiration but do not perform photosynthesis. These organisms obtain energy by breaking down organic molecules like glucose to produce ATP through cellular respiration.

What are the starting and products of photosynthesis?

In photosynthesis, the starting materials are carbon dioxide, water, and sunlight. The products of photosynthesis are glucose (sugar) and oxygen.

How does carbon dioxide leave the atmosphere and end up in living things?

One big way it leaves the atmosphere is by being consumed by living plants in the process of photosynthesis that results in sugars and other carbon-containing compounds like cellulose. Herbivores (plant-eaters) then consume these and integrate the carbon matter, so to speak, into their own systems.

When light is absorbed by chlorophyll molecules the excited electrons leave the molecule What is the source of electrons that makes chlorophyll stable again?

The source of electrons that makes chlorophyll stable again is water. The process of photosynthesis involves the splitting of water molecules to provide electrons, which are then used to replace the electrons lost from the chlorophyll molecule during absorption of light.

Where are the light energy absorbing molecules used in photosynthesis found?

The light energy absorbing molecules, such as chlorophyll, are found in the chloroplasts of plant cells. These molecules are responsible for capturing light energy and initiating the process of photosynthesis.

What type of food is produced by photosynthesis?

Photosynthesis uses light energy, water, and carbon dioxide to form glucose for the plant and oxygen as a waste product.

6CO2 + 6H2O + light energy ---> C6H12O6 + 6O2

Disregarding the light energy, coenzymes, and ATPs produced, the photosynthetic reaction is the exact reverse of the cellular respiration reaction.

How much ATP is produced in the light dependent reactions?

In the light-dependent reactions of photosynthesis, ATP is produced through the process of photophosphorylation. Each cycle of the light-dependent reactions produces two molecules of ATP.

Which compound is formed as a common part of the process of photosynthesis?

Well as the word equation for the photosynthesis reaction states that:Carbon dioxide + Water (in the presence of light energy) → Glucose + OxygenIn other words, the compound that is formed at the end of the reaction is glucose and oxygen.

Balanced equation to represent photosynthesis:

6CO2 + 6H2O (+light energy)--------> C6H12O6 + 6O2

Why doesn't green light promote photosynthesis?

Green light does not promote photosynthesis because it is reflected off of a plants leaves. While most plants absorb all other wavelengths of electromagnetic rays from the sun, they reflect the wavelength for green light.

Does Mountain Dew affect the grow of plants?

Mountain Dew contains water, sugar, caffeine, and other chemicals that can potentially harm plants if used as a regular watering solution. The high sugar content can attract pests and disrupt the soil's pH balance, while the caffeine may inhibit plant growth. It's not recommended to use Mountain Dew or any other soda as a plant fertilizer. Stick to water or appropriate plant food for healthier growth.

What is the purpose of the ATP and NADPH produced in the light reactions of photosynthesis?

ATP isn't created during the process of photosynthesis. Photosynthesis merely creates glucose, which is afterwards consumed to create the ATP. This ATP, however, serves the purpose all ATP does in the body: energy that the cell can use.

What stages of photosynthesis would be considered a light reaction?

The light reaction of photosynthesis includes the light-dependent reactions: photon absorption by chlorophyll, water splitting, electron transport chain, and the production of ATP and NADPH.

How does photosynthesis produse biomass?

During photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose (a form of sugar) and oxygen. The glucose produced is then used by the plant to create biomass in the form of leaves, stems, roots, and other plant tissues. This process is essential for plant growth and the formation of organic matter in ecosystems.

What is the difference between aerobic and anaerobic respiration and photosynthesis?

Aerobic Respiration takes place in eukaryotic cells, uses oxygen, and produces more ATP(Adenosine Tri-phosphate). Anaerobic Respiration occurs in Prokaryotic cells, does not use oxygen, and produces less ATP than Aerobic Respiration. Photosynthesis does not use oxygen but it does produce it. Aerobic and Anaerobic Respiration both use glucose to make energy, but photosynthesis makes glucose for food. This is because it is an autotroph and makes its own food.

Is artificial photosynthesis possible?

Yes, as it stands scientist have been able to reduce photosynthesis to it's two half reactions (reduction and oxidation reactions, better known as redoes) and complete the light-dependent reactions independently, through photo-electrolysis. A replicator for the Calvin-Benson Cycle (light-independent reactions, which consist of turning water, carbon dioxide and sunlight into carbohydrates -usually glucose- through the use of Adenosine Triphosphate -ATP- and a few other energy producing compounds), however, has yet to be created, there are many issues with the photo-catalyst , but scientist (many are at/from MIT) are attempting to create the catalyst.

What is misleading about the following statement Plants perform photosynthesis and animals perform cellular respiration?

The statement is misleading because both plants and animals perform both photosynthesis and cellular respiration. Plants perform photosynthesis to produce energy, while animals perform cellular respiration to break down energy-rich molecules and release energy.

What is a reactant in the general photosynthesis equation?

In the general photosynthesis equation, carbon dioxide (CO2) is a reactant. It is used by plants, algae, and some bacteria in the process of photosynthesis to produce glucose and oxygen in the presence of sunlight.