There are 180 adenine bases in the given DNA molecule if DNA molecule contains total of 600 bases and 20% of the bases are cytosine.
In general , 20% of the bases are cytosine, we know that 20% of the bases are also guanine, since C+G=T+A=100%. Thus, the total percentage of cytosine and guanine in the DNA is 40%. To determine the percentage of adenine, we can subtract the total percentage of cytosine and guanine (40%) from 100% to get the percentage of thymine and adenine. 100% - 40% = 60%.
Also, percentage of adenine in the DNA molecule is also 30% (since adenine pairs with thymine). To find the actual number of adenine bases, we need to multiply this percentage by the total number of bases in the DNA molecule: 0.30 x 600 = 180 So, there are 180 adenine bases in this DNA molecule.
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a hair is long, has a cross section that is circular, and has a uniform color. where did it most likely originate?
If a hair is long, has a circular cross section as well as a uniform color then it must have been originated in the head.
Hair is present in different parts of our body. They are not just present on the head but also on the skin on our hands, legs, face etc. The hair which is given is long in length, has a uniform color on its entire length, the cross section of the hair is circular.
The hair which is found in the head also has scales which are flat as well as narrow. The hair which are obtained from other areas of the body might vary in length, color, textures as well as the scales which are present.
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Vitamin A is a relatively small, lipid-soluble molecule that can behave as a hormone. Most likely its receptor
A. Is an ion channel receptor
B. Is a protein kinase receptor
C. Involves a G protein
D. Is not connected to the plasma membrane
E. Does not exist; vitamin A does not have a receptor
Vitamin A is a relatively small, lipid-soluble molecule that can behave as a hormone. Most likely its receptor involves a G protein.
What is Vitamin A?
Vitamin A is a crucial nutrient that is beneficial to human eyesight, a healthy immune system, and cell growth. It is known for promoting healthy vision, skin, and mucous membranes. Vitamin A Receptor: Vitamin A receptor is a type of nuclear receptor protein, it is a zinc-finger transcription factor.
Vitamin A receptor is a mediator of retinoid signals, which are in charge of regulating biological processes such as development, cell differentiation, and homeostasis. Vitamin A receptor binds the retinoic acid, which can modify the DNA transcriptional activity.
The receptor most likely to be involved in Vitamin A is a G protein. Lipid-soluble hormones are hormones that can diffuse into the cells. They bind to receptors inside the cells, which can then modify gene expression to produce a response.
G protein-coupled receptors are transmembrane receptors that are bound to a G protein. G proteins are a family of proteins that are activated by G protein-coupled receptors. They interact with effector proteins to produce second messengers. As a result, the response is sent via intracellular signaling pathways.
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Which statement is correct concerning hereditary information?(1) A chromosome is composed of many genes.(2) A gene is composed of many chromosomes.(3) Each chromosome carries the same information.(4) Each gene carries the same information.
Answer: (1) A chromosome is composed of many genes.
A gene is a sequence of DNA, which are instructions on how to make proteins for the cell. Proteins are then used as building blocks to make tissue or other essential things the body needs. Those proteins also determine things like a person's eye color. Each gene has a stop and end point. When you bundle a bunch of genes together, you form a group known as a chromosome. Each chromosome has a different role to play, so not all chromosomes carry the same information.
please hurry ill give brainlest
Answer:
Plant cell bc I did this in school and got it right
What is the colored part of the eye?A) Optic nerveB) CorneaC) PupilD) Iris
The colored part of the eye is called iris, that surrounds the pupil.
how does the rabies virus infect the brain following a bite from an infected animal? be specific and explain how the virus specifically infects the nervous system.
Rabies virus travels through nerves to spinal cord and brain. The process can last approximately 3 to 12 weeks.
The Rabies viruses move on and fix to different nerve cells until ultimately they get to the brain. There the virus can purpose the mind to swell, and the individual with rabies may go right into a coma and die.
The immune response in a rabid animal, in laboratory experiments, suggests each antibodies and cell immunity being activated to clean the virus. however, the issue is the incapacity of the infected animal to decorate the BBB permeability so that immune antibodies and cells can go into the CNS
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What’s the student scientific question?
Answer:
The scientific question posed by the student is, Does compost cause tomato plants to grow faster and taller than artificial fertilizer?
Explanation:
3. Lindsey went to the beach every 7 days and Molly went to the beach every 4 days. How often
did they see each other at the beach?
Answer:
Depending on the time she went an how long she stayed,
Explanation:
Answer:28
Explanation: you need to multiple 7 x 4 = 28
The _____ form of a trait is the one that is not expressed in the F1 generation of a monohybrid cross.
The recessive form of a trait is the one that is not expressed in the F1 generation of a monohybrid cross.
In genetics, the expression of traits is governed by the inheritance of genes from parents to offspring. Each gene has two versions, called alleles, which can be either dominant or recessive. The dominant allele expresses its trait even in the presence of the recessive allele, whereas the recessive allele expresses its trait only when it is present in a homozygous state, that is, when both copies of the gene are the recessive allele.
In a monohybrid cross, two parents are crossed that differ in only one trait controlled by one gene. When two homozygous parents with contrasting traits are crossed, such as a homozygous dominant (AA) and a homozygous recessive (aa), the resulting offspring in the first filial generation (F1) will all be heterozygous (Aa) and show only the dominant trait.
Therefore, the recessive form of a trait is the one that is not expressed in the F1 generation of a monohybrid cross.
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What are the end products of the HYDROLYSIS of a polysaccharide?
Answer:
The most important polysaccharide to man. Upon complete hydrolysis will yield glucose molecules. found as a stored polysaccharide in the liver of man and other animals. This is how our bodies store sugars for later use.
Explanation:
Brainliest please?
Answer:
simple sugar also called monosaccharies like glucose ect...
Check the image for question
What does water vapor rising include?
Water vapor rising refers to the process by which water molecules in the air become more energetic and move more freely, causing them to rise higher in the atmosphere. This can occur as a result of several different factors, including:
1. Temperature: Water vapor will tend to rise in the atmosphere if it is warmer than the surrounding air. As the water molecules absorb heat energy, they become more energetic and are able to move more freely, causing them to rise.
2. Humidity: Water vapor will also tend to rise in the atmosphere if the air is already saturated with moisture. When the air becomes saturated, any additional water vapor that is added to it will be less likely to stay in the air and will instead tend to condense and fall to the ground.
3. Pressure: Water vapor will also tend to rise in the atmosphere if the air pressure is lower at higher altitudes. As the water molecules rise and the air pressure decreases, they become more energetic and are able to move more freely, causing them to rise further.
Overall, water vapor rising is an important process in the Earth's atmosphere that helps to distribute heat and moisture around the planet and to regulate the Earth's climate.
The boatbill is present in a density of at least one pair per 20 acres at the same time that two different types of plants are dominant. What are these plants?
A. Weeds and grasses
B. Grasses and Shrubs
C.Shrubs and small trees
D. small trees and canopy trees
The two types that the boatbill will dominate are grasses and shrubs according to the attached table. So the correct option is B.
What is the boatbill?The boatbill is a type of bird genus that will be predominantly in grasses and shrubs. They can change the composition of these areas as time passes. This type of bird will feed mainly on insects, cicadas being the main ones in its diet. They can also feed on small fish or small animals such as lizards. But its main diet is not other animals but it can also feed on fruits.
As for its reproduction, the female will be in charge of building the nest with sticks and herbs that the male will provide. Once the nest is formed, the female will lay her eggs in it and the incubation period will be given so that the chicks leave this and after a certain time, leave the nest.
Therefore, we can confirm that the correct option is B. grasses and shrubs.
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what is socialisation?write its advantages
Happy Birthday jamila
Answer:
Socialization is the process by which human begin to acquire the skills necessary to perform as a functioning member of their society.
It's advantages are:-
Mental Health.
Confidence and self-esteem. ...
Increased quality of life.
Reduced blood pressure.
Reduced risk of Alzheimer's.
Boost immunity and other physical health benefits.
Increased brain health.
Promotes purpose.
And Happy bithday jamila!!don't understand help
first ones first
PHOTOSYNTHESIS TRAPPING ENERGY
Photosynthesis occurs in two stages: 1) Light-dependent reactions in which sunlight energy is used to produce ATP and NADPH. 2) Light-independent reactions (Calvin cycle) that produce organic molecules. The concept map is attached.
What is photosyntesis?
Photosynthesis is a process that occurs in organisms with chloroplasts. It involves two stages: light-dependent and light-independent reactions.
LIGHT-DEPENDENT REACTION
It occurs in the thylakoids of chloroplasts. Involves the noncyclic pathway which is a flow of electrons along a chain located in the thylakoid membrane.
Photosynthetic pigments like chrorophyll are in charge of light absorption. When sunlight reaches the pigments, electrons get excited and move along the electron transporter chain.
Electrons are provided by water molecules, which splits into oxygen and H+.
During these reactions, oxygen is released, while ATP and NADPH are produced. Both of them are used during light-independent reactions.
LIGHT-INDEPENDENT REACTION
Light-independent reaction is known as the Calvin cycle, and it takes place in the stroma.
During the Calvin cycle, sugars or carbohydrates are synthesized.
When carbon dioxide, CO₂, enters the leaves through stomas, it diffuses to the chloroplast stroma.
Carbon atoms fixate, meaning that they incorporate into organic molecules. These molecules are used to produce 3-C sugars.
The whole process is impulsed by ATP and NADPH coming from light-dependent reactions.
In the attached files you will find the complete concept map.
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Explain the basic steps in the first half of photosynthesis (light-dependent reactions). Describe the movement of electrons and the importance of hydrogen ions in developing a proton gradient that allows for ATP production.
Answer:
Photosynthesis is the process by which plants make their own food in the presence of sunlight by utilizing carbon-dioxide and water and produces oxygen and energy.
The process of photosynthesis has two types of reactions: light-dependent reactions and light-independent reactions.
The light-dependent reactions occur in the thylakoid membranes of chloroplasts in which plants use light energy to form ATP and the reduced electron carrier NADPH.
In this reaction, photosystem II (P700) absorbs lights energy and passed it to reaction center. this energy is then is transferred to photosystem I (P680), that pump an electron to a high energy level. The high-energy electron then travel to an electron transport chain and releases energy. this released energy pump H+ ions into the thylakoid interior from the stroma and build a gradient H+ ions move through gradient and they pass through ATP synthase resulting in the formation of ATP.
The higher energy electron as moves into an electron transport chain, the electron is passed to NADP+ to form NADPH.
Answer:
In the light-dependent reactions of photosynthesis, electrons become excited after photons strike the light-absorbing pigment chlorophyll. These excited electrons are then transferred from the chlorophyll to the electron transport chain. To replace the loss of electrons from the chlorophyll, water molecules present in chloroplasts are split in a process called photolysis. The separate components of water get recycled and used. The freed electrons replace those that supported the electron transport chain. The released hydrogen helps to develop a proton gradient in the thylakoid membranes. This gradient helps to fuel the production of ATP.
Explanation:
Imagine that you find a layer of rock containing many fossil clams. The layer of rock is 50 km from the ocean. The fossils are about 5 million years old. Clams usually live in shallow ocean water. Based on the fossils, what can you guess about the environment in this area 5 million years ago?
Answer:
No ocean is present 5 million years ago.
Explanation:
There is no ocean or sea in this area 5 million years ago because the land is present where these fossils live but with the passage of time the geography of that place changes and the ocean covered the area and these fossils remain below the ocean inside the layer of land. So we can conclude from the presence of these fossils that there is no ocean present in these regions 5 million years ago .
The area that contains many fossil clams used to covered with ocean water 5 million year ago
Clams are the the variety of shel-fish that are usually found in shallow water and are important to maintain the web of the ecosystem
5 million years ago the area of 50 km was covered with shallow water range but with the time and environmental change area with clams got vanished and with time changed into fossil.
Therefore, the area of 50 km used to covered with ocean water 5 million year ago.
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HELP ME PLEASE!!!!!!
climate region of Russia. Coniferous forests are located in the
A.) tundra
B.) subarctic
C.) semiarid
D.) humid continental
Answer:
subartic/b
Explanation:
I took the test! If Im right please mark brainliest!
Answer:
Yes the answer is b.
Explanation:
I took the unit test to
Caterpillars have hair-like bristles on the back side of their bodies. the bristles can be long or short. caterpillars with short bristles have two recessive alleles (ss) for the trait. a Caterpillar that is heterozygous for the bristle trait is crossed with a Caterpillar that has short bristles. the cross produces 220 offspring. how many of the offspring are expected to have short bristles?
Answer:110
Explanation: 220 x .5
The formation of an ionic bond involves the
Select one:
O sharing of neutrons.
sharing of protons.
transfer of neutrons
transfer of electrons
Answer: transfer of electrons
Explanation:
ILL MARK BRAINLIEST FOR REASONABLE ANSWER!!
2) All oxygen in the atmosphere can be traced back to what molecule?
Answer:
In water molecules
Explanation:
"Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesized"
hiv protease is an example of an aspartyl protease; an enzyme that utilizes an aspartate side chain during the catalytic cleavage of a peptide bond. since hiv protease is a relatively small homodimer of a 99-residue protein, it can be directly synthesized, or cloned and expressed in fast growing cells. for this reason, it was targeted for structure-based drug design in order to treat hiv infection.
HIV protease is an example of an aspartyl protease, which is an enzyme that utilizes an aspartate side chain during the catalytic cleavage of a peptide bond.
As a relatively small homodimer of a 99-residue protein, it can be directly synthesized or cloned and expressed in fast-growing cells, which has made it a target for structure-based drug design to treat HIV infection.
HIV protease is an enzyme that is produced by the HIV virus. It is essential for the maturation of the virus, as it cleaves the viral polyproteins at specific sites. As a result, HIV protease is an attractive target for drugs that aim to prevent HIV replication. Structure-based drug design involves the use of structural information about a protein to design drugs that bind to it and inhibit its activity.
This approach was applied to HIV protease in order to identify compounds that could bind to the enzyme and block its activity. By doing so, it was hoped that these drugs could prevent the maturation of the virus and thus reduce the spread of HIV infection.
In conclusion, HIV protease is an example of an aspartyl protease that is targeted for structure-based drug design to treat HIV infection. Its relatively small size and ability to be synthesized or cloned and expressed in fast-growing cells make it an attractive target for drug discovery.
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If fall months in the Northern Hemisphere experience greater cloud cover
compared to the average during a year, which of the following would
likely happen?
Choose all that apply:
-Temperatures would go up in the Northern Hemisphere.
-Temperatures would go down in the Northern Hemisphere.
-The amount of the sun's energy absorbed by Earth would decrease.
-The amount of the sun's energy absorbed by Earth would increase.
Answer: - The amount of the sun's energy absorbed by Earth would decrease.
- Temperatures would go down in the Northern Hemisphere.
Explanation:
The extensor muscles of the upper limb lie almost exclusively in the ______ region of thatlimb.A) posteriorB) anteriorC) medialD) lateral
So, the correct answer to your question is: A) Posterior
The extensor muscles of the upper limb are responsible for extending or straightening the limb. These muscles are primarily located in the posterior region of the limb.
The extensor muscles of the upper limb are responsible for extending the arm, wrist, and fingers. These muscles are located almost exclusively in the posterior region of the limb. The posterior region refers to the back of the upper limb, which is the side opposite to the palm. This region is sometimes referred to as the dorsal region. The extensor muscles originate from the humerus, the ulna, and the radius bones of the arm and forearm. They then insert onto various points on the hand, wrist, and fingers.
The extensor muscles of the upper limb are important for performing activities such as lifting weights, throwing a ball, and typing on a keyboard. They work in opposition to the flexor muscles, which are located in the anterior region of the upper limb. The flexor muscles are responsible for flexing the arm, wrist, and fingers. Together, the extensor and flexor muscles of the upper limb allow for a wide range of movements and activities.
In summary, the extensor muscles of the upper limb lie almost exclusively in the posterior region of that limb, which is the side opposite to the palm. These muscles play a vital role in performing a wide range of activities and movements, and work in opposition to the flexor muscles located in the anterior region of the upper limb.
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What are some components of a chemical reaction?
alveolar cells secrete (name of substance), which reduces surface tension, (increasing or decreasing) lung compliance.
Alveolar cells secrete a substance called surfactant, which reduces surface tension, increasing lung compliance.
The alveolar cells are specialized cells that form the alveoli of the lungs. Alveolar cells can be of two types: type I and type II. Type I alveolar cells are involved in gas exchange in the lungs, while type II alveolar cells produce surfactant. The respiratory epithelium is made up of two types of cells.
The first type is the squamous cells, also known as type I cells, which cover the majority of the alveolar surface. They are extremely thin and aid in gas exchange by minimizing the air-blood diffusion distance.The second type of cell is the cuboidal cells, also known as type II cells, which secrete surfactant.Surfactant decreases surface tension, making it easier for the alveoli to expand and contract during the breathing process. The lungs, therefore, will be more compliant if surfactant is present. In the respiratory system, lung compliance is a measure of how quickly and easily the lungs expand and contract as a result of changes in transpulmonary pressure (the difference between the intrapulmonary pressure and the intrapleural pressure). The lungs are more elastic and compliant when there is less surface tension.
Therefore, the presence of surfactant in the alveoli reduces surface tension and increases lung compliance.
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if all cells contain the exact same copy of DNA, how do they become specialized?
Even if all the cells have the same DNA they biochemical function are different, that's because differents sets of genes must be turned on and off in each cell type by the action of enzymes and other molecules. Each cell have the same 20,000 or so genes but they are biochemically selected by the action of molecules as hormones and chemical signaling. Therefore, different cells use different parts of the DNA code as directions.
Can implantation bleeding be mistaken for a period.
Answer:
Yes
Explanation:
It can be confused for a period because it's similar, but bleeding is lighter and you might also experience cramps
Poem on the effects of the human population on the earth
Some one please do at least 2 stanzas of a great poem on this topic. And please don’t plagiarize anyone, it has to be an original piece.
Answer:
there is an empty expanse
where the forest lays the eggs of man
and breeds villainy into little baskets of life
that prey on mother nature
like leeches on the edge of glory
with the foulmouth tongue of business.
dogs run wild with no leashes:
the same could be said for man,
for there are few waves without the wind.
there is little life without death.
no man without the wild woman of the earth.
and yet we fall from eden
till we crash and burn,
till the forest grows anew,
till the sky is once more blue.
i don't know how to do this one
Answer:
what don't you know how to do?