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3 years ago

What happens during photosynthesis?

Biology

2 answers:

pishuonlain [190]3 years ago

7 0

Answer:

The correct answer will be- option-D

Explanation:

The autotrophs are the organisms which synthesize food material on their own which could be photo-autotrophs or chemo-autotrophs.

Photosynthesis is a process which synthesizes the food molecule using carbon dioxide in the presence of sunlight. The photosynthesis process occurs in photobacteria, green plants and the green algae.

Since photosynthesis is involved in the synthesis of glucose molecule which is an organic compound therefore, option-D is the correct answer.

sashaice [31]3 years ago

5 0

Answer: D. Autotrophs produce organic molecules

During photosyntheis, plants make sugar(an organic molecule and a type of carbohydrate). Photosynthesis occurs in autotrophs only, the organisms which are able to make their food like plants. Plants take air and water and produces glucose in presence of sunlight( a photochemical reaction). The product of the reaction is glucose which is one of the four types of organic molecule which is use by plants to make cells and their parts and growth.

Heterotrophs are the organisms which cannot make their own food and rely on other organisms for nutrients. Hence option 1 and 2 cannot be the part of answer. While the plants consume inorganic nutrients(decayed matter) from soil.

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What would happen to the concentrations of ATP, NADPH and Sugars if PSI stopped

rodikova [14]

Answer:

Concentrations of ATP, NADPH and sugars would decrease

Further Explanation:

Light energy is absorbed and transferred to the reaction center.
A water molecule is split.
Electrons are transferred from photosystem II to photosystem I.
ATP is synthesized from ADP and inorganic phosphate.

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule.
Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
the electron moves down an electron transport chain (ETC) to PS I where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
ATP synthase converts ADP and Pi to the energy storage molecule ATP.
The electron gets to photosystem I where it goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
in the ETC, the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

If PSI is stopped, this disrupts the ETC and prevents regeneration of NADPH along with ATP production. ATP is an energy storage molecule reuired for the producton of several compounds. Additionally, NADP and NADPH are integral to the dark reactions, or Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

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6 0

4 years ago

What would require more land to grow food crops? If all humans ate only vegetables

jasenka [17]

Answer:

If all humans ate only meat, will require more land to grow food crops

Explanation:

1) Currently, over 60% of the world food crops are eaten by animals. Given that food crops are generally consumed more than meat in a proportion of 8:1, if all humans ate only meat, the amount of land required to grow food crops will have to be increased by at least 400%

2) Presently, animal agriculture makes use of 70% of lands allocated to agriculture, such that increasing the livestock by an extra 400% will lead to mass deforestation in order to produce livestock feeds

3) It is more costlier to produce livestock than to produce crops, which will make the availability and allocation of land essential for the raising of livestock in order to reduce costs, thereby taking more land.

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3 years ago

Burning fossil fuels and land use moves 29 Gt of carbon per year into the atmosphere. Which biosphere process is responsible for

salantis [7]

Burning fossil fuels and land use moves 29 Gt of carbon per year into the atmosphere. Which biosphere process is responsible for moving carbon from fossil fuels into the atmosphere<u> a. </u><u>Combustion.</u>

Combustion is a chemical technique in which a substance reacts unexpectedly with oxygen and gives off heat. Combustion refers to the technique in which a substance burns in the presence of Oxygen, giving off heat and light in the manner.

Combustion structures employ the electricity of chemical compounds released at some point of this reactive manner for transportation, to generate electric-powered energy, or to provide warmth for numerous programs. Chemistry and combustion are interlinked in numerous approaches.

learn more about Combustion here

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2 years ago

Why are insects important for flowering the plants ?

pickupchik [31]

The insects have an important role in the pollination of the flowering plants. The insects acts as a carrier of the pollen grains for different flowering plants.

3 0

4 years ago

Help me with the 4 of them i mark u as brainlist 20 points

MakcuM [25]

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3. Normal talking is 40 decibels more intense. You can figure this out by subtracting the decibels of whispering from the decibels of normal talking (60-20)
4. The pain threshold is 120 decibels. This means the jet sounds could be painful because it is 140 decibels, or higher than the threshold.

4 0

4 years ago

Read 2 more answers