What does a photosystem consist of?

Each photosystem consists of multiple antenna proteins that contain a mixture of 300–400 chlorophyll a and b molecules, as well as other pigments like carotenoids. Cytochrome b6f complex and ATP synthase are also major protein complexes in the thylakoid membrane that work with the photosystems to create ATP and NADPH.

What does a photosystem consist of quizlet?

A photosystem that contains a pair of P680 chlorophyll molecules and uses absorbed light energy to produce a proton-motive force for the synthesis of ATP. Oxygen is produced as a byproduct when water is split to obtain electrons.

Which of the following structures is a component of a photosystem?

A photosystem consists of 1) a light-harvesting complex and 2) a reaction center. Pigments in the light-harvesting complex pass light energy to two special chlorophyll a molecules in the reaction center. The light excites an electron from the chlorophyll a pair, which passes to the primary electron acceptor.

What are the essential parts of a photosystem?

Each photosystem consists of two closely linked components: the first is the antenna complex formed by hundreds of pigment molecules that capture photons and transfer the harvested light energy to the second component named the reaction center, which possesses Chl a molecules in a matrix of protein.

What composes a photosystem Brainly?

Photosystems are functional and structural units of protein complexes involved in photosynthesis that together carry out the primary photochemistry of photosynthesis: the absorption of light and the transfer of energy and electrons. Photosystems are found in the thylakoid membranes of plants, algae and cyanobacteria.

Whats the process 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 is the function of a photosystem quizlet?

[The key function of each of the two photosystems is to absorb light and convert the energy of the absorbed light into redox energy, which drives electron transport.

Which of the following is associated with photosystem 1?

The light reaction of photosynthesis. High-energy electrons, which are released as photosystem I absorbs light energy, are used to drive the synthesis of nicotine adenine dinucleotide phosphate (NADPH). Photosystem I obtains replacement electrons from the electron transport chain.

What is the function of the first photosystem quizlet?

Photosystem I produces NADPH, which is similar in function to the NADH and FADH2 produced by the citric acid cycle. NADPH is an electron carrier that can donate electrons to other compounds and thus reduce them.

How many parts of photosystem are there?

two parts Each photosystem has two parts: a reaction center, where the photochemistry occurs, and an antenna complex, which surrounds the reaction center. The antenna complex contains hundreds of chlorophyll molecules which funnel the excitation energy to the center of the photosystem.

Where are photosystem 1 and 2 located?

Location. Photosystem 1: Photosystem 1 is located on the outer surface of the thylakoid membrane. Photosystem 2: Photosystem 2 is located on the inner surface of the thylakoid membrane.

Which of the following materials are products of photosynthesis?

The products of photosynthesis are glucose and oxygen.

What are the three components that are present in a photosystem?

Components of PSI (protein subunits, lipids, pigments, coenzymes, and cofactors). Related large transmembrane proteins involved in the binding of P700, A0, A1, and Fx. Part of the photosynthetic reaction centre protein family.

What are the essential parts of a photosystem quizlet?

Terms in this set (5)

What composes a photosystem describe each?

Each photosystem is composed of a core complex and a peripheral antenna system, light harvesting complex I (LHCI) for PSI and light harvesting complex II (LHCII) for PSII, respectively.

What are the stages of photosynthesis in order?

It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) generation of ATP, and (4) conversion of CO2 into carbohydrates (carbon fixation).

What is plant photosynthesis?

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar. 5 – 8.

What are the 7 steps of photosynthesis?

Terms in this set (7)

What are the four things needed for the process of photosynthesis?

The process of photosynthesis Photosynthesis takes place in the part of the plant cell containing chloroplasts, these are small structures that contain chlorophyll. For photosynthesis to take place, plants need to take in carbon dioxide (from the air), water (from the ground) and light (usually from the sun).

Which of the following describes the structure of a chloroplast?

Chloroplasts are enclosed by an envelope of two membranes which encompass a third complex membrane system, the thylakoids, including grana and lamellae. In addition, starch grains, plastoglobules, stromules, eyespots, pyrenoids, etc. are also important structures of chloroplasts.

What is the function of the first photosystem?

Photosystem I receives electrons from plastocyanin or cytochrome c6 on the lumenal side of the thylakoid membrane and uses light energy to transfer them across the membrane to ferredoxin on the stromal side. It can also function in a cyclic electron transport pathway.

Which of the following is a function of photosystem two?

Photosystem II (PSII) is a multi-component pigment-protein complex that is responsible for water splitting, oxygen evolution, and plastoquinone reduction.

What is produced as a result of the electron transport chain associated with photosystem 2?

Photosystem II obtains replacement electrons from water molecules, resulting in their split into hydrogen ions (H+) and oxygen atoms. The oxygen atoms combine to form molecular oxygen (O2), which is released into the atmosphere. The hydrogen ions are released into the lumen.

What is produced in the electron transport system associated with photosystem 2?

What is produced in the electron transport system associated with photosystem II? … The splitting of water molecules provides a source of electrons. ATP is formed. Chlorophyll (and other pigments) absorbs light energy, which excites electrons.

Which of the following observations would be the best indicator that an organism lacks photosystem 2?

Which of the following observations would be the best indicator that an organism lacks photosystem II? It produces glucose in the light and dark.It produces CO2 in the light.

What is the key product of each photosystem?

Each photosystem consists of multiple antenna proteins that contain a mixture of 300–400 chlorophyll a and b molecules, as well as other pigments like carotenoids. Cytochrome b6f complex and ATP synthase are also major protein complexes in the thylakoid membrane that work with the photosystems to create ATP and NADPH.

Where does photosystem 1 get its electrons quizlet?

In photosystem I, energy from sunlight energizes a pair of electrons in the reaction center (replaced by a pair of electrons from photosystem II) and these are passed to molecules of NADP+ to reduce them to NADPH. This molecule carries the electrons (and potential energy) to the carbon reactions of photosynthesis.

What is the role of photosystem 2 in photosynthesis?

Photosystem II is the first link in the chain of photosynthesis. It captures photons and uses the energy to extract electrons from water molecules. … As these electrons flow down the chain, they are used to pump hydrogen ions across the membrane, providing even more power for ATP synthesis.