P I and PII are proteic compounds present in the thylakoid membrane that contain about 300 chlorophyll molecules each.
Step IFirst of all light with a wavelength of 690nm is absorbed by P II. The light excites an electron that leads to the photolysis of water(H2O--->2H+ +2e- + 1/2O2). The two electrons released go into the electron transport chain. The second compound in electron transport chain is plastoquinone that is reduced when it accepts electrons then oxidised when it loses them to P I. The next two compounds are cytocromes that make hydrogen protons go inside the thylakoid when they recieve the electrons.(I will mention what happens to the H+ in the second step). The next compound in the electron transport chain is a compound that contains Fe and S. The electrons finally reach the last step: Reduction of NADP+ to NADPH+H+.
Step IIIn the second step is ATP synthesis. Hydrogen protons accumulate inside the thylakoid membrane. An electrochemical gradient is formed. The protons can leave the thylakoid according to this gradient through an enzyme.
When the protons flow through , it turns ADP into ATP.
To sumarize: the role of P II is O2 production through photolysis and ATP synthesis(indirectly) The role of P I is NADPH+H+ synthesis.
what are the parts of a cell and is the nucleus part of the cytoplasm?!
Answer:
part of cell are cell membrane,mitochondria,vacoules,ribosomes and many more ,yes nucleus is the part of cytoplasm because cytoplasm is a jelly like substance where all organelle of a cell are present and nucleus is also present in cytoplasm.
Explanation:
What is a stomata?
A. the little mouths on the leaf of a plant where they take in CO2,and release 02
B. Where the plant takes in water
A. the little mouths on the leaf of a plant where they take in CO2,and release 02
stoma=mouth
Those structures are located on the backside of the leaf
how is the top layer of the ocean different from the deepest layer
Answer:
It gets colder and denser as you go deeper
Explanation:
Answer:
There is way less warmth, and sunlight, And way more pressure.
Explanation:
Please help, if question is right I will give brainliest.
Answer:
Flagella
Explanation:
The flagella or flagellum has a long, tail-like extension.
NEED HELP ASAP!!!!!!
What would be the three amino acids that correspond to the mRNA sequence: GGACACCCG
Question 1 options:
arg, ser, pro
glu, pro, his
gly, his, pro *********
pro, his, pro
HOW DO PROKARYOTIC ORGANISMS MAINTAIN HOMEOSTASIS?
Answer:
Prokaryotes can make proteins to help stop the negative effects of a change in either pH or temperature.
Explanation:
Proton pumps help balance out pH, while heat shock proteins help keep proteins together when temperature climbs too high. hope this helps
Which best explains why metal cooking utensils often have plastic coating on their handles?
O Plastic melts less easily and lasts longer than metal.
O Plastic reduces the transfer of thermal energy to hands holding the utensils.
O Plastic molds more easily into shapes like long, thin handles.
O Plastic increases the rate of conduction from the utensil to the food.
tìm
Answer:
B) Plastic reduces the transfer of thermal energy two hands holding the utensil.
Explanation:
plastic is a good insulator which means it's prevent energy, in this case thermal energy, from conducting into the person holding it. Metal is a very good conductor which is why you wouldn't want it to touch your hand while you're cooking.
Answer:
Plastic reduces the transfer of thermal energy to hands holding the utensils
What’s the answer som1 answers plz
What is NOT an important role of mitochondrial metabolism for accelerated cancer cell growth (you can choose multiple)
It provides ATP
It provides intermediates metabolites for pentose pentose phosphate pathway
It provides intermediates metabolites for lipid synthesis
It provides intermediate metabolites for amino acid synthesis
It provides building blocks for carbohydrate synthesis
Answer: the pentose phosphate pathway and carbohydrate biosynthesis occur in the cytoplasm. Lipid synthesis occurs at the endoplasmic reticulum.
Explanation: the central feature of mitochondrial metabolism is the citric acid cycle which provides ATP and intermediates for amino acid synthesis. The ATP is transported to the cytoplasm to drive other metabolic processes.
44Based on context, the term resistance in paragraph 6 means _______.
A: opposition
B: approval
C: variation
D: individualize
Answer: Its A Opposition
Explanation: Hope it helps
Which happens during crossing over?
A. Two sex cells join together and combine DNA.
B. Genes are exchanged between two alleles.
C. Genes are exchanged between two egg cells.
D. Chromosomes line up randomly during metaphase I.
. In which part of the alimentary canal is water absorbed?
I need a serious answer
Explanation:
Most nutrients and up to 90% of the water has been absorbed by the small intestine. Ascending colon is to absorb the remaining waterAnswer:
small intestine .............
What affect does the toxic algae bloom have on local communities and ecosystems?
Answer:
Algal blooms can reduce the ability of fish and other aquatic life to find food and can cause entire populations to leave an area or even die. Harmful algal blooms cause thick, green muck that impacts clear water, recreation, businesses and property values.
Explanation:
Answer: Algal blooms can reduce the ability of fish and other aquatic life to find food and can cause entire populations to leave an area or even die. Harmful algal blooms cause thick, green muck that impacts clear water, recreation, businesses and property values.
Explanation: hope this helps ! :). What process is shown in the figure below?
Answer: I didn't see it yet
Explanation: I didn't see it yet
What is a buffer?
a solution that can receive any amount of acid or base to form a neutral solution
a solution that can receive moderate amounts of acid or base with little change in pH
a solution that neutralizes acids and increases the pH of bases
Answer:
Buffer,in chemistry, solution usually containing an acid and a base, or a salt, that tends to maintain a constant hydrogen ion concentration
Explanation:
I'm pretty sure its b
glucose is a simple sugar. what is the chemical formula of glucose?
Answer:
Glucose V= has the molecular formula C₆H₁₂O₆.
What form of energy is stored in food? A. heat B. light energy C. energy of motion D. energy in molecules
Answer:
d
Explanation:
Answer:
A hope this helps
Explanation:
1..Why do organisms need
perform respiration?
Answer:
All organisms respire in order to release energy to fuel their living processes.
Explanation:
The respiration can be aerobic, which uses glucose and oxygen, or anaerobic which uses only glucose. Because this process occurs in all life, we call it a universal chemical process.
Explain why plants cells require both chloroplasts and mitochondria to meet their energy needs
Answer:
chloroplast is where photosynthesis takes place, and mitochondria stores and releases the energy, it's like having a battery but no cord to charge anything
Explanation:
what animal is this?
Answer:
It is a flying squril.
Explanation:
According to the visual, which three continents, as of 2004, are the largest consumers or energy per capita?
Answer:
the first largest consumer is china,then next united state and the third is canada
Which state does the seedling do not rely on the cotyledon for growth. Explain how the seedling continues its growth
Explanation:
oviduct dip yucks dizzy icon sick issue sick
Answer:
seedling is a young sporophyte developing out of a plant embryo from a seed. Seedling development starts with seedling of the seed. A typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (embryonic shoot), and the cotyledons (seed leaves). The two classes of flowering plants (angiosperms) are distinguished by their numbers of seed leaves: monocotyledons (monocots) have one blade-shaped cotyledon, whereas dicotyledons (dicots) possess two round cotyledons. Gymnosperms are more varied. For example, pine seedlings have up to eight cotyledons. The seedlings of some flowering plants have no cotyledons at all. These are said to be acotyledons.The plumule is the part of a seed embryo that develops into the shoot bearing the first true leaves of a plant. In most seeds, for example the sunflower, the plumule is a small conical structure without any leaf structure. Growth of the plumule does not occur until the cotyledons have grown above ground. This is epigeal germination. However, in seeds such as the broad bean, a leaf structure is visible on the plumule in the seed. These seeds develop by the plumule growing up through the soil with the cotyledons remaining below the surface. This is known as hypogeal germination.
Explain how water circulates between the hydrosphere and atmosphere to create weather and climate. Use complete sentences and give at least three supporting details.
Answer:
Due to evaporation, weather and climate are created.
Explanation:
Water circulates between the hydrosphere and atmosphere with the help of evaporation. Evaporation occurs on the water bodies where the water molecules evaporate and goes to the atmosphere forming clouds. These clouds are responsible for rainfall and snowfall in different regions and as a result weather and climate are created. This cycle of water in the atmosphere is known as meteorological cycle.
Answer:
This is just so you can mark the other person brainiest!
Explanation:
The spindle apparatus begins to become visible during
O anaphase
Ometaphase
O interphase
O prophase
O telophase
Answer:
answer is prophase
have a nice day
Which of the following is NOT true of Chlorophyll?
A) It reflects all the colors of light but absorbs the green.
B) It reflects the green wavelengths of light and absorbs all the rest.
C) It is essential for photosynthesis?
Answer: A.It reflects all the colors of light but absorbs the green.
Explanation:
Photosynthesis, which gives plants their green hue, requires chlorophyll. Therefore, option (A) is not true.
What is chlorophyll?Chlorophyll, the pigment that gives plants their distinctive green hue, is crucial to the process of photosynthesis, which provides energy for a plant's metabolism, growth, and reproduction. Because chlorophyll does not absorb the green wavelengths of white light, it is chlorophyll that gives plants their green hue. The plant appears green because it reflects that particular light wavelength. Autotrophs are plants that produce their own sustenance through photosynthesis.
The stroma, which is the area between the thylakoid and chloroplast membranes, is where the chlorophyll, the green pigment, is found.
Learn more about chlorophyll, here:
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please help I give lots of points!
Answer:
Opinions A or C is the best answer in my opinion
Explanation:
I'm not 100% sure but I hope it helps!
What may happen if tectonic plates stopped moving?
A) Ocean water will freeze.
B) There will be no new mountain formations.
C) Volcanic activity will increase.
D) Continents will move towards the poles.
Answer:
b
Explanation:
b
Answer:
c
Explanation:
biosphere
Question 5 of 25
How are photosynthesis and cellular respiration related?
A. Photosynthesis releases energy, while cellular respiration stores
energy
B. Cellular respiration is the process animals use to produce glucose,
while photosynthesis is the process plants use to produce
glucose.
C. Cellular respiration breaks down glucose, while photosynthesis
produces glucose.
D. Photosynthesis produces water molecules, while cellular
respiration splits water molecules apart.
SUBMIT
Which crop is preferably harvested by hand?
A. Wheat
B. Rice
C. Potato
D. Grapes
1. How are the colors of the rainbow related to white light from the sun?
White light contains only the four secondary colors of the rainbow.
White light does not contain any of the colors of the rainbow.
White light contains only the three primary colors of the rainbow.
White light is made up of all the colors of the rainbow.
Answer:
And? What is the questIon??
Explanation: