1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vova2212 [387]
3 years ago
9

-

Biology
1 answer:
fiasKO [112]3 years ago
8 0

Explanation:

-Pheophytin

P680 the primary donor of Photosystem II becomes excited and transfers an electron to pheophytin. Pheophytin is the initial intermediate electron acceptor and carrier in Photosystem II; it is a chlorophyll-like molecule that lacks a central magnesium ion.

Further Explanation:

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, like Pheophytin .
  • 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 (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.

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

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

#LearnWithBrainly

You might be interested in
explain how having a haploid number of chromosomes contributes to the function of gametes in a life cycle
kotegsom [21]
Having the haploid number of chromosomes allows the zygote to have the correct number. If gametes weren't haploid, every generation of organisms would have twice as many chromosomes as their parents. I hope my answer has come to your help. God bless and have a nice day ahead!
7 0
3 years ago
Coral reefs cover less than ___ of the ocean floor. <br> A)1% <br> B)2% <br> C)4% <br> D)3%
nikdorinn [45]

Answer:

c

Explanation:

3 0
2 years ago
Which of the following is composed of more dense tissue?
klasskru [66]
C Dermis because it’s not the others ones
4 0
3 years ago
Read 2 more answers
What might happen if some lysosomal enzymes are absent?​
murzikaleks [220]

Answer:

Explanation:

The main fuction of lysosomal enzymes like lipases ,proteases, carbohydrases is to hydrolyse/digest various unwanted material in the cell. And sometimes to digest some nutrient in the cell.

These enzymes are capable of digesting carbohydrates,proteins,lipids and nucleic acids. Lysosomal enzymes are produced by a memberane bound cell organel called lysosome.

WHAT IF LYSOSOMAL ENZYMES ARE ABSENT:

==> If lysosomal enzymes are absent then build up of various unwanted substances increase to a abnormal level, which may increase toxicity in the cell.

==>build up of various dead or unwated cells in the body will increase,since lysosome have the capacity to digest its own cell.

==> absence of lysosome will will cause the cells to starve,since most of the nutrients in the cells are digested by lysosome enzyme.

==> Can cause a high risk of disease,since lysosome digest its own cell if it is infected with some microbial activity.

Read more on Brainly.in - https://brainly.in/question/1148871#readmore

8 0
3 years ago
A dental mouth mirror is an example of a ____________ patient-care item
Lyrx [107]
<span>A dental mouth mirror is an example of a semi-critical patient-care item.

In dentistry, a dental mouth mirror is an important tool. Dentists used this tool to see the locations in the oral cavity.

The instruments which do not penetrate soft tissues or bones but only contact with non-intact skin are Semi-critical instruments. whenever you use these type of instruments, you should sterilize them after each use.
</span><span>
</span>
7 0
3 years ago
Other questions:
  • In which of the following ways do animals get the water that they need to survive? by eating plants and animals that contain wat
    11·1 answer
  • Guys can you help with two questions?
    12·1 answer
  • 50 points and brainleist how can i gain weight if i was born 4 days early than due date DON'T GOOGLE
    9·1 answer
  • What do the stripes in the paper represent?
    14·2 answers
  • When acid comes into contact with calcite, the acid bubbles. How can geologists use acid to confirm that the rock towers are mad
    6·1 answer
  • ''what is the first thing you should do to get toner dust off your clothes
    6·1 answer
  • A cell is treated with a drug that prevents the formation of new lysosomes. The cell continues to transcribe the genes that code
    6·1 answer
  • You learned about wave energy, tidal energy, and current energy. Think about the coastline closest to where you live. Which type
    6·1 answer
  • Only answer if you have an answer to one of the questions. Thank you.
    12·2 answers
  • An organ or tissue may be better able to resist damage from hypoperfusion if the:_________
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!