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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

Is it possible there is no photosynthesis?

No, photosynthesis is a fundamental process in plant biology where plants use sunlight to convert carbon dioxide and water into glucose and oxygen. Without photosynthesis, plants would not be able to produce energy and oxygen, which is essential for the survival of many organisms on Earth.

Is oxygen released during photosynthesis?

Oxygen molecules are not necessarily produced during photosynthesis. However, oxygen is needed for photosynthesis, along with sunlight, water, and other nutrients. They are all taken in by the plant through various entrances and converted into the simple sugar, glucose. The bi-product of this production, is carbon-dioxide, which is excreted from the plant's cells back into the environment.

What is post harvest technology and preservation?

Post-harvest technology involves all treatments or processes that occur from time of harvesting until the foodstuff reaches the final consumer. Efficient techniques for harvesting, conveying/transportation, handling, storage, processing/preservation, packaging, etc are components of the post-harvest chain. Harvesting is normally included as a component of the although post-harvest strictly means 'after harvest' because how produce are harvested have a large bearing on the post-harvest life of the produce. Even in some cases, pre-harvest factors that affect post-harvest life (in terms of quality and losses) of the produce are considered As can be inferred from above, preservation is a part of the post-harvest chain. In fact, preservation of the taste, smell, look and feel of food and preventing spoilage is also an important function of food processing. Preservation is accomplished by inactivating basic natural processes in food: * Enzyme action - all food contains natural enzymes that break down proteins, fats and carbohydrates to facilitate animal and plant growth. Once an animal has been killed or a plant harvested, these enzymes, if left uncontrolled, continue to work, breaking down the food itself and resulting in spoilage. * Microbial action - all food can be attacked by bacteria and fungi that cause food to rot or become mouldy. If permitted to multiply, these microbes can cause spoilage. * Oxidation - many food components can be attacked by oxygen in the air, making them go rancid or resulting in an unpleasant taste. This, too, must be controlled.

Does temperature affects the photosynthesis?

Yes it does, The rate of photosynthesis in relation to temperature forms a bell curve. At low temperatures the enzymes responsible for photosynthesis have very little energy so the rate of photosynthesis is very slow. if it is cold enough for water to freeze it can be very harmful to a plant. as the temperature increases, the enzymes get more energy so the rate of photosynthesis increases. If it gets too hot the enzymes begin to lose their shape (denature). this means they are unable to function properly and the rate of photosynthesis decreases again. also at higher temperatures the stomata close to prevent water loss. this also stops gas exchange which slows photosynthesis even further. if it is hot enough for water to boil this can be very harmful.

What role does the sun play in photosynthesis?

The sun provides the energy needed for photosynthesis to occur. During photosynthesis, plants capture sunlight through their chlorophyll pigments and convert it into chemical energy in the form of glucose (sugar), which serves as food for the plant. Without the sun's energy, photosynthesis would not be able to take place.

Comparing and contrasting photosynthesis and cellular respiration?

2 ways alike:

both photosynthesis and respiration occur in organelles of plant cells.

both involve the flow of electrons through the cell membrane in order to harvest energy.

2 ways they are different:

Respiration produces energy, where as Photosynthesis requires energy

Photosynthesis takes place in chloroplasts, respiration takes place in mitochondria

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Best Answer - Chosen by Voters2 ways alike:

What does NADPH add to the Calvin cycle?

NADPH donates high-energy electrons to the Calvin cycle, specifically to help reduce carbon dioxide into carbohydrates. These electrons come from the light-dependent reactions in photosynthesis and are crucial for the production of sugars in plants.

Which part of the plant cell absorbs the energy from the sun and uses it in photosynthesis?

Chloroplasts are responsible for absorbing sunlight and converting it into energy through the process of photosynthesis in plant cells. Within the chloroplasts, the pigment chlorophyll captures the sunlight and initiates the chemical reactions needed for photosynthesis to occur.

What equation best describes photosynthesis?

The overall equation for photosynthesis is: 6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2. This summarizes the process where carbon dioxide, water, and light energy are converted into glucose and oxygen by plants.

What are the 2 main reactions in photosynthesis?

Photosynthesis happens in two stages, also called reactions. The first stage is the light-dependent stage. In this stage light energy is absorbed by chlorophyll and converted into chemical energy, and water is split to produce hydrogen. The unwanted oxygen from the water is released. The second stage is the light-independent stage. In this stage the chemical energy and the hydrogen from the first stage are used to convert carbon dioxide into carbohydrates, such as glucose. More details can be found on this site by searching for photosynthesis.

What is wood botanically?

Wood is a hard, fibrous structural tissue found in the stems and roots of trees and other woody plants. It is primarily composed of cellulose, hemicellulose, and lignin, and serves as a support system for the plant while also conducting water and nutrients.

What substances does photosynthesis produce?

Photosynthesis produces glucose, which is a type of sugar that serves as the main source of energy for plants and other organisms. Additionally, during the process, oxygen is released as a byproduct into the atmosphere.

Is photosynthesis performed by all plants?

All plants that HAVE CHLOROPHYLL. Most plants that have chlorophyll are green.

Photosynthesis is when H20 and C02 is taken in from a plant and using the energy of the sun, turn it into glucose (C6 H12 O6), which is used as food in plants.

Most of the photosynthesis occurring in the plant happens in the leaves. When glucose is created, then phloem (vascular tissue located in the stem) carries it to other places in the plant, thus powering the whole plant.

The sugar from three turns of the Calvin cycle is glyceraldehyde-3-phosphate G3P which is a consequence of this?

G3P is a three-carbon molecule that serves as a critical intermediate in the Calvin cycle. It is used to generate glucose and other carbohydrates that plants need for growth and metabolism. The production of G3P is essential for converting carbon dioxide into organic compounds that fuel plant growth.

Does the Calvin cycle release or absorb energy?

The Calvin cycle absorbs energy in the form of ATP and NADPH in order to convert carbon dioxide into glucose.

Light absorbing pigment in plants and some protists that is required for photosynthesis?

Chlorophyll is the light-absorbing pigment in plants and some protists that is essential for photosynthesis. It absorbs sunlight and converts it into chemical energy that is used to produce sugars from carbon dioxide and water. Without chlorophyll, the process of photosynthesis cannot occur.

What substance needed for photosynthesis does the tree take from the soil?

The tree takes up water and minerals from the soil, which are essential for photosynthesis to occur. Water and minerals are absorbed through the tree's roots and transported to the leaves where photosynthesis takes place.

What vegetables store their food in stem?

Some vegetables that store their food in their stems include kohlrabi, rhubarb, and asparagus. These vegetables rely on their stem structures to store nutrients and energy for growth and reproduction.

In photosynthesis what waste products are produced?

In photosynthesis, the waste product produced is oxygen. Oxygen is released as a byproduct when plants and other photosynthetic organisms use sunlight to convert carbon dioxide and water into glucose and oxygen.

What is palisades job in photosynthesis?

Palisade cells in plant leaves are responsible for photosynthesis. They contain many chloroplasts, where photosynthesis occurs, and are packed with chlorophyll pigments that capture light energy. This energy is then used to convert carbon dioxide and water into glucose, a form of energy that plants can use.

What are 2 energy sources created in the light reactions?

The two energy sources created in the light reactions of photosynthesis are ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate). These molecules carry energy that can be used in the Calvin cycle to produce carbohydrates.

What was the earth's atmosphere before like photosynthesis?

Before photosynthesis, the Earth's atmosphere was primarily composed of carbon dioxide and nitrogen, with very little oxygen. The emergence of photosynthetic organisms led to an increase in atmospheric oxygen levels over time.

Where does the xylem get water?

The xylem gets water from the roots of the plant through the process of transpiration and root pressure. Water is absorbed by the plant's roots from the soil and transported through the xylem tissues to the rest of the plant.

Can ATP be directly derived from sunlight?

No, ATP cannot be directly derived from sunlight. ATP is produced through cellular respiration, a process that converts energy stored in glucose into ATP. Sunlight is required for photosynthesis, which produces glucose through the conversion of sunlight, water, and carbon dioxide.