photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

What does energy in an ecosystem have to do with photosynthesis?

The net effect of photosynthesis and respiration is for light energy to be converted to chemical energy. This is the conservation of energy in ecosystems: the sunlight absorbed by plants and microbes ultimately goes on to power the entire ecosystem.

What is the energy captured in the first stage of photosynthesis used for?

During the first stage of photosynthesis, called the light-dependent reaction, sunlight excites the electrons in the chlorophyll pigment. The organism uses this energy to create the energy carrier molecules ATP and NADPH, which are crucial for carbon fixing during the second stage.

Where the 2nd stage of photosynthesis takes place?

The second stage of photosynthesis takes place in the stroma surrounding the thylakoid membranes of the chloroplast. The reactions of this stage can occur without light, so they are sometimes called light-independent or dark reactions.

What happens during Stage One of photosynthesis?

In stage 1, light is absorbed by chlorophyll a molecules bound to reaction-center proteins in the thylakoid membrane. The energized chlorophylls donate an electron to a quinone on the opposite side of the membrane, creating a charge separation (see Figure 16-38).

Photosynthesis: Crash Course Biology #8

26 related questions found

Does photosynthesis release energy?

Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules. The energy used to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as cellular respiration.

What is the energy flow of photosynthesis?

photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

What produces energy through photosynthesis?

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

What are the events occur during the process of photosynthesis?

The three major events that occur during the process of photosynthesis are: > Absorption of light energy by chlorophyll. > Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.

Which gas is released during photosynthesis?

Oxygen is released during the process of photosynthesis.

What type of reaction is photosynthesis?

Photosynthesis is an endothermic reaction. This means it cannot occur without energy (from the Sun). The light required is absorbed by a green pigment called chlorophyll in the leaves. Chlorophyll is found in chloroplasts in plant cells , particularly the palisade and spongy mesophyll cells .

How does energy enter in the ecosystem?

Energy enters the ecosystem via sunlight as solar energy. Primary producers (a.k.a., the first trophic level) turn that solar energy into chemical energy via photosynthesis. ... The energy that has been stored in those organisms' matter is transferred to that next trophic level. Some energy is lost as heat and as waste.

How does energy flow through an ecosystem?

Energy flows through an ecosystem in only one direction. Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. ... Producers are always the first trophic level, herbivores the second, the carnivores that eat herbivores the third, and so on.

What energy is needed by photosynthesis organism during the process of photosynthesis?

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

Is released during photosynthesis True or false?

Photosynthesis takes place in mesophyll cells. From the above information we have found that carbon dioxide is not released during photosynthesis. Instead of it oxygen is released. Hence, the correct answer is option (B).

Is photosynthesis anabolic or catabolic?

Photosynthesis, which builds sugars out of smaller molecules, is a "building up," or anabolic, pathway. In contrast, cellular respiration breaks sugar down into smaller molecules and is a "breaking down," or catabolic, pathway.

Is the energy releasing process in the plants?

Answer: Plant obtain energy from a process called photosynthesis. In this process the plants make their food by taking heat from sunlight and absorbing water from their roots and with carbon dioxide.

What is the flow of energy in an ecosystem called?

There are several different factors that control the primary productivity of energy and biomass flow. Energy flow is the amount of energy that moves through a food chain. The energy input, or energy that enters the ecosystem, is measured in Joules or calories. Accordingly, the energy flow is also called calorific flow.

How does energy flow in an ecosystem quizlet?

Energy flows through an ecosystem in a 1-way stream, from primary producers to various consumers. ... Producers receive chemicals from light rays, 1st-level consumers eat producers, 2nd-level consumers eat 1st-level consumers, and 3rd-level consumers eat 2nd-level consumers.

How do you find the total energy transferred during photosynthesis?

The energy (e) of a photon is given by the equation e = hc/λ, where c is the velocity of light, h is Planck's constant, and λ is the light wavelength. The energy (E) of an einstein is E = Ne = Nhc/λ = 28,600/λ, when E is in kilocalories and λ is given in nanometres (nm; 1 nm = 10⁻⁹ metres).

What forms of energy are entering and exiting during the photosynthesis process?

photosynthesis | Biology Quiz - Quizizz. The equation below shows the process of photosynthesis. What forms of energy are entering and exiting this process? Chemical energy is entering, and light energy is exiting.

Is photosynthesis a combustion reaction?

Combustion is a chain reaction chemically similar to photosynthesis in reverse. Photosynthesis requires a large amount of heat which is furnished by the sun. The Combustion process releases this heat.

What is released from photosynthesis?

In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct. ... Carbon dioxide and water are products of this reaction.

How chemical energy is formed from light energy during photosynthesis?

During the process of photosynthesis, light penetrates the cell and passes into the chloroplast. ... Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP. The third phosphate chemical bond contains the new chemical energy.

How is chlorophyll involved during photosynthesis?

During photosynthesis, chlorophyll captures the sun's rays and creates sugary carbohydrates or energy, which allows the plant to grow.