The luminous reactions begin when light reaches photosystem II. The water molecules provide electrons to the photosystem, releasing oxygen and protons. The letter A represents photosystem II that splits water.
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1. Luminous energy is trapped by chlorophyll in Photosystem II.
2. When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
3. The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
4. When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules.
5. Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
6. When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II.
7. When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
8. The released energy is used to produce ATP molecules.
9. Hydrogen ions go back from the stroma to the thylakoid compartment.
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The main function of the
rough endoplasmic reticulum is the production of
The main function of the Rough Endoplasmic Reticulum is the production of membrane and proteins secreted by the cell.
What is Endoplasmic Reticulum?The endoplasmic reticulum serves as the transport system of the eukaryotic cell, with many other important functions such as protein folding. It is a type of organelle made up of two subunits –
1. Rough endoplasmic reticulum (RER)
2. Smooth endoplasmic reticulum (SER)
It has a continuous nuclear envelope. The endoplasmic reticulum contains ribosomal granules anchored to the cytoplasmic surface of the cisternae is involved in the synthesis and secretion of proteins through membrane-bound vesicles called ergastoplasms.
Thus, the main function of the Rough Endoplasmic Reticulum is the production of membrane and proteins secreted by the cell.
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in gene expression, which enzyme is responsible for transcribing the dna sequence into mrna by adding complementary rna nucleotides?
Answer:
RNA polymerase II
D. How is the energy produced by respiration stored?
Answer:
the nucleoside triphosphate ATP
Answer:
Respiration releases energy - it is an exothermic process. The energy is stored in molecules of ATP . ATP can be broken down in other processes in cells to release the stored energy.
Explanation:
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the protein that permits stretching and recoiling of the skin is:
Answer:
Elastin
Explanation:
Hope this helps :)
How many neutrons and protons does carbon have
Answer:
Carbon has an atomic number of 6. That means a carbon atom has 6 protons, 6 neutrons, and 6 electrons.
Explain in your own words the difference between a leading strand and a lagging strand.
Answer:
So basically the primary distinction between the leading and lagging strands is that the leading strand is the DNA strand that develops continuously during DNA replication, whereas the lagging strand is the DNA strand that grows in small pieces known as Okazaki fragments. A leading strand is one that is produced in the 5'-3' direction, whereas a lagging strand is one that is formed in the 3'-5' direction. The leading strand is constantly produced where the other is not.
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biologists think that endosymbiosis gave rise to mitochondria before plastids partly because:
Suggest how the scent from the flowers
spreads out into the air
Answer:
through diffusion
Explanation:
I think so that by diffusion this occurs
Answer:
Pollinators which may be insects, birds, or other animals would reach the flower by being stimulated through their sense of smell. The scent from flowers gets spread through the air everywhere because the scent producing molecules are low weight. The low molecular weight help them spread and diffuse everywhere
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please help for biology
Answer:
the first one
Explanation:
escribe los pasos que le hacen falta al progreso productivo
Answer:
sí
Hablo español con fluidez. ¿Con qué necesitas ayuda?
Explanation:
Write one scientific question about the organism in the photo
Answer:
What's the scientific name of sunflower?
From what did it evolve from?
compare and contrast classical and operant conditioning
In classical conditioning, the involuntary response is seen, while operant conditioning is based upon the learning experience. An organism will perform more or less based on its experience with operant conditioning.
What are classical conditioning and operant conditioning?In classical conditioning, the stimulus is given and an involuntary response is observed. The Pavlov experiment on dogs is one example. He gave food to the dog and rang the bell at the same time for some days. After that, he only rang the bell, and the dog salivated without the food. Here, salvation is an involuntary response to the stimulus (bell ringing).
In operant conditioning, animals perform actions based on their experience. Example: A mouse is put in a box with an electric supply and food supply. When the mouse accidentally presses the electric switch, it gets an electric shock. This is negative reinforcement, and the mouse is less likely to perform the same function again. When it pushes the food lever, the food comes from the food box. This is positive reinforcement. The mouse is more likely to perform this.
Hence, in classical conditioning, the involuntary response is seen. Operant conditioning is based on learned experience.
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which superficial flexor muscle of the forearm is the most lateral?
Answer:
pronator teres
Explanation:
after the blood leaves the heart, through what kinds of vessels and in what order does the blood move?
Answer: the pulmonic valve, into the pulmonary artery and to the lungs.
Explanation:
If two glasses of water are at the same temperature, the average kinetic energy of the particles of water in each glass is the same.True orFalse
Answer:
True
Explanation:
Temperature is the measure of average kinetic energy of objects, in this case it is water in a glass. If both temperatures are the same, then both average kinetic energies are the same.
The human population can maintain an exponential growth rate indefinitely because humans are exempt from population crashes.
True
False
Answer:
Most likely false
Explanation:
Humans aren't exempt from population crashes, if we spent up our recourses, started wars, etc. It HAS happened before, so most likely false.
ماهو تركيب الجينينوم البشري؟
Answer:
لدى البشر جينومان ، نووي وميتوكوندريا
Answer: يشتمل الجينوم النووي على ما يقرب من 32000000 نيوكليوتيدات من الحمض النووي ، مقسمة إلى 24 جزيء خطي ، وأقصر 5000000 نيوكليوتيد في الطول وأطول 260000000 نيوكليوتيد ، كل منها موجود في كروموسوم مختلف.
Explanation:
What is happening to the chromosomes in this phase of mitosis?
Answer: The answer is A
During mitosis (nuclear division), the chromosomes condense, the nuclear envelope of most cells breaks down, the cytoskeleton reorganizes to form the mitotic spindle, and the chromosomes move to opposite poles. Chromosome segregation is then usually followed by cell division (cytokinesis).
what part of the nucleotide forms the rungs of the ladder
Organelles that are surrounded by two membranes and contain DNA are the
a nucleus, the endoplasmic reticulum, and lysosomes.
b. nucleus, the endoplasmic reticulum, and chloroplasts.
c. nucleus and mitochondria.
d. endoplasmic reticulum and the Golgi apparatus.
Answer:
C
Explanation:
The nucleus contains most of the dna and the mitochondria contains a small amount
Mitochondria and nucleus are organelles that are surrounded by two membranes and contain DNA. Therefore, option (C) is correct.
What are cell organelles ?
Cell organelles are specialized structures who's function is to perform various jobs inside the cell. These can be found in either prokaryotic or eukaryotic cells.
Eukaryotes are two membrane bound structure i.e. have cell wall and cell membrane. They contain organelles who are also double membraned in nature for e.g. mitochondria and nucleus.
Apart from these mitochondria and nucleus can undergo DNA replication independently due to presence of DNA . Mitochondria generate most of the chemical energy required to power the cell's biochemical reactions. And nucleus contain genetic information along with instructions required for cellular processes.
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help pls answer the question at the bottom
Answer:
no
Explanation:
the lizerd is cold blooded
during the process of ________, an existing tissue is replaced by bone.
Answer:
Tissues are replaced by bone during the ossification process.
Explanation:
what was the path of darwin’s voyage
Answer:
In 1831, Charles Darwin received an astounding invitation: to join the HMS Beagle as ship's naturalist for a trip around the world. For most of the next five years, the Beagle surveyed the coast of South America, leaving Darwin free to explore the continent and islands, including the Galápagos.
Explanation:
Most of the trip was spent sailing around South America. There Darwin spent considerable time ashore collecting plants and animals. Darwin filled notebooks with his observations of plants, animals, and geology. The trip was an almost five-year adventure and the ship returned to Falmouth, England, on October 2, 1836.
please help its due today 50pts
appreciate it
You may choose either a plant cell or an animal cell. You must include the following parts of the cell:
Cell Wall (Plant only)
Cell Membrane
Cytoplasm
Nucleus
Endoplasmic Reticulum
Golgi
Ribosomes
Lysosomes
Vacuoles
Chloroplasts (Plant only)
Mitochondria
Cell City Map
Draw (or create a drawing using a program like PowerPoint) a city map and label locations that are analogous to the parts of the cell.
Your map should:
Include illustrations of each location.
A legend that identifies each location and explains how it relates to each part of the cell.
Be colorful, clear, and carefully drawn.
(Solo or Group)
Cell Story
Write a story in which the setting or the characters are analogous to parts of the cell. Throughout your story, you will include footnotes linking your setting elements or characters to parts of the cell. Your explanations must highlight a key characteristic of each part of the cell.
Your story should:
Include representations of each part of the cell.
Include footnotes explaining the links between your representations to the parts of the cells
Be written with proper grammar, spelling, and formatting.
Answer: cytoplasm: a thick solution that fills each cell and is enclosed by the cell membrane.
Nucleus:the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Explanation:
why do the functions of many receptor kinases depend on the fluid nature of the plasma membrane?
Complete Question
Why do the functions of many receptor kinases depend on the fluid nature of the plasma membrane?
The generation of cAMP requires a fluid membrane.Binding of ligand to the receptor requires a fluid membrane. The receptor monomers must move together and dimerize to be activated. Phosphorylation requires a fluid membrane.We have that
The reason why the functions of many receptor kinases depend on the fluid nature of the plasma membrane is because
Phosphorylation requires a fluid membrane.
Generally
kinase
This substance is simple defines as a facilitator for phosphate forms to move from a specific energy level to its specific sub levelsNow we recognize this phenomenon as Phosphorylation Phosphorylation being a process that facilitates the movement of phosphates requires a fluid membrane.
Therefore
The reason why the functions of many receptor kinases depend on the fluid nature of the plasma membrane is because
Phosphorylation requires a fluid membrane.
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Joyce and Linda are identical twins who are 50 years old and enjoy exercising daily. Joyce avoids eating any dairy or animal products and eats granola made with canola oil for breakfast. Linda prefers rich foods, and eats bacon, eggs, and buttered toast each morning. Which statement describes a logical inference that can be made from the provided information?
Answer:
The two sisters though identical have some differences while the former avoids fatty meals and cholesterol the latter enjoys fatty meals in contrast with the statement they both exercise daily which burns out the fat
Calculate the magnification of an object with length 4cm , if the length of the drawing is 40cm
Answer:
-0.33
Explanation:
the three main types of scientific investigations are descriptive, comparative, and experimental. Which components are included in all three types of investigations?
Answer:
testing a hypothesis
Explanation:
What is the chemical energy molecules used by cells
Answer:
Adenosine 5'-triphosphate, or ATP
Explanation:
Answer:Adenosine 5'-triphosphate, or ATP
Explanation:
baby jamison was born with . this is a genetic disorder in which the lungs are clogged with large quantities of abnormally thick mucus.
