What is the hydrogen acceptor in photosynthesis?
Explanation: NADP (Nicotine amide adenide dinucleotide phosphate) accepts hydrogen in the process of photosynthesis to form NADPH.
Which of the following are hydrogen acceptors during photosynthesis and respiration?
So, the correct answer is ‘ NAD & FAD ‘.
What are the electron acceptors in photosynthesis?
photosynthesis, light reaction The final electron acceptor is NADP+, which is reduced to NADPH. NADPH generated from light reactions is used in sugar synthesis in dark reactions. Light reactions also generate a proton motive force across the thylakoid membrane, and the proton gradient is used to synthesize ATP.
What are hydrogen acceptors?
Any substance that is capable of becoming reduced and accepting hydrogen atoms, which allows the release of energy from such a reaction.hydrogen acceptor –> hydrogen carrier.
How does Chemiosmosis work?
Chemiosmosis involves the pumping of protons through special channels in the membranes of mitochondria from the inner to the outer compartment. The pumping establishes a proton (H+) gradient. After the gradient is established, protons diffuse down the gradient through a transport protein called ATP synthase.
Which of the following are hydrogen acceptors?
The term NAD stands for nicotinamide adenine dinucleotide and NADP stands for nicotinamide adenine dinucleotide phosphate. Both of them are the most common and best hydrogen acceptors. NAD and NADP both act as coenzymes during the process of photosynthesis.
What is the role of NADP+ in photosynthesis?
What is the role of NADP+ in photosynthesis? It is reduced and then carries electrons to the Calvin cycle. As a component of photosystem II, it catalyzes the hydrolysis of water. It acts as the primary electron acceptor for the photosystems.
Which best describes the process of Chemiosmosis?
Which of the following best describes the process referred to as “chemiosmosis”? A concentration gradient of protons across the inner mitochondrial membrane is utilized to produce ATP.
What is Chemiosmosis in cellular respiration?
Chemiosmosis is the movement of ions across a semipermeable membrane bound structure, down their electrochemical gradient. An important example is the formation of adenosine triphosphate (ATP) by the movement of hydrogen ions (H+) across a membrane during cellular respiration or photosynthesis.
How do you identify hydrogen bond acceptors?
Donor sites = the sum of the H atoms connected to the donor atoms. Acceptor count = the sum of the acceptor atoms. An acceptor atom always has a lone electron pair/lone electron pairs that is capable of establishing a H bond. Acceptor sites = the sum of the lone pairs on the acceptor atoms.
What functional groups are hydrogen bond acceptors?
C−O−C (hydrogen-bond acceptor) [some] C−NR (hydrogen-bond acceptor)…That means these parts of these functional groups count:
- ketone ( C=O )
- aldehyde ( C=O )
- alcohol ( C−OH )
- carboxylic acid ( C=O , C−OH )
- ester ( C=O , C−O−C )
- amine ( −N−H , −N−R )
- imine ( =N−H , =N−R )
- amide ( C=O , −N−H , −N−R )
Where does chemiosmosis take place in photosynthesis?
During photosynthesis, chemiosmosis occurs in the chloroplasts, whereas during respiration, chemiosmosis occurs in the mitochondria. Due to chemiosmosis, there is a development of proton gradient across the semipermeable cell membrane, which couples with the synthesis of ATP molecules.
What are the light driven electron transfer reactions of photosynthesis?
The light-driven electron transfer reactions of photosynthesis begin with the splitting of water by Photosystem II (PSII). PSII is a chlorophyll–protein complex embedded in the thylakoid membrane that uses light to oxidize water to oxygen and reduce the electron acceptor plastoquinone to plastoquinol.
What is the structure of photosynthetic pigments in plants?
Major photosynthetic pigments in plants The chemical structures of the chlorophyll and carotenoid pigments present in the thylakoid membrane. Note the presence in each of a conjugated system of carbon–carbon double bonds that is responsible for light absorption.
How do plants and algae respond to photorespiration?
To counter photorespiration, plants, algae and cyanobacteria have evolved different CO2-concentrating mechanisms CCMs that aim to increase the concentration of CO2relative to O2in the vicinity of Rubisco. One such CCM is C4photosynthesis that is found in plants such as maize, sugar cane and savanna grasses.
What are the main organs of photosynthesis in plants?
In land plants, the principal organs of photosynthesis are the leaves (Figure 2A). Leaves have evolved to expose the largest possible area of green tissue to light and entry of CO2to the leaf is controlled by small holes in the lower epidermis called stomata (Figure 2B).