Answer:
NH4+ and aspartate are the two molecules of the urea cycle contribute these two nitrogen.
Explanation:
Two nitrogen-containing groups are used to make urea in liver cells. The nitrogen atoms enter the urea cycle as NH4+ and aspartate. The first step of the urea cycle take place in liver mitochondria. In liver mitochondria, NH4+ combines with HCO3- to form carbamoyl phosphate.
So,
NH4+ and aspartate are the two molecules of the urea cycle contribute these two nitrogen.
Ammonia and aspartate are the two molecules of the urea cycle contribute
these two nitrogen used in the formation of urea.
These compounds are produced in the liver through the breakdown of
amino acids in the liver. The amino acids undergo transamination and
deamination reactions which results in the formation of these compounds.
The ammonia which is highly toxic is converted into urea which is then
excreted from the body.
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It is known that some tumors are associated with tumor viruses. It remains unknown, however, whether or not other tumors such as those induced by chemical carcinogens are also associated with tumor viruses. Design a series of experiments to test the hypothesis that a chemical carcinogen-induced tumor cells contain altered genome (as compared to its unaltered state in the normal cell counterparts) and this genomic DNA alteration is responsible for the transformed phenotypes of the tumor cells. Include in your experimental design the following:
1) the overall strategy,
2) the reagents chosen including controls and why they are chosen,
3) at least four types of transformation assays, including both in vitro and in vivo assays, to be used to measure the properties of transformed cells, and
4) the strategy to interpret the results and to draw a conclusion.
Answer:
Experimental procedure:
1- To expose cell lines to both chemical carcinogens and viruses known to produce cancer (e.g., Epstein-Barr virus, hepatitis B virus, human papillomavirus, herpesvirus-8, etc) simultaneously.
2- By using real-time PCR (RT-PCR), to amplify mRNAs for specific target oncogenes both in normal cells and in cells that acquired cancer traits such as, for example, cell proliferation and survival. During this experimental procedure, it is required to include in vitro transformational assays including 1-anchorage independence, 2-morphological transformation (where the cells are scored for lack of contact inhibition), 3-focus formation and 4-immortalization.
3- Also by RT-PCR, to amplify mRNAs for specific viral mRNAs (i.e., to determine the viral load) in cancer-related cell lines.
4- To determine if there is a statistical significance between specific oncogene mRNAs versus viral expression in cancer-related cell lines
Experimental controls:
- Negative control: normal cells (i.e., cells non-exposed to chemical carcinogens and viruses)
- Positive control: immortalized cell lines where it has been found that the target oncogenes are expressed. It is possible to obtain this genetic data from other studies (i.e., by searching this information in the corresponding scientific publications)
Explanation:
By using this experimental procedure, it is possible to identify if there exists a correlation between the presence of viral mRNA and oncogenes previously recognized for being amplified in different types of cancers in cell lines that were capable of developing cancer traits.
What is blue and white inside?
Explanation:
light blue combining color
Scientists warn that rising CO2 levels will have what effect on the Earth?
A
cause sea levels to drop
B
trap heat in the atmosphere causing the greenhouse effect
C
cause acid rain
D
speed up the next ice age
Answer:
B
Explanation:
Because Molecules of carbon dioxide (CO2) can absorb energy from infrared (IR) radiation. This animation shows a molecule of CO2 absorbing an incoming infrared photon (yellow arrows). ... This ability to absorb and re-emit infrared energy is what makes CO2 an effective heat-trapping greenhouse gas. And it will lead to green house effect...
Scientists warn that rising CO2 levels will have trap heat in the atmosphere causing the greenhouse effect on the earth. Thus, option B is correct.
What are scientific thinking?Scientific thinking is a type of information that includes intentional information seeking, including asking questions, testing hypothesis and making observations as well as recognizing pattern.
The scientific or scientists are clear as to the purpose at hand and questions at the issue. The scientific essential standards that should be implies on the elements of scientific thought such as clarity relevance depth, breath, logic and accuracy.
The scientific thinking prefers to thinking about the content of science and the set of reasoning process.The example of scientific thinking is that question information, conclusions and points of view which is strive to be accurate, relevant and precise.
Therefore,Scientists warn that rising CO2 levels will have trap heat in the atmosphere causing the greenhouse effect on the earth. Thus, option B is correct.
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How do each growing stage of an insect vary?
Answer:
Most insects change in form during their development, and the successive stages are not all alike. This change in form is called metamorphosis. It is controlled by a juvenile hormone secreted by glands in the insect's head. The juvenile hormone is released during each molt, but the amount decreases each time.
Explanation:
Essential nutrients move through a cell membrane by both passive transport and
active transport. Which of the following correctly describes the transport of
materials across a cell membrane?
A. Active transport requires chemical energy to move nutrients from areas of
low concentration to areas of high concentration.
B. Passive transport requires chemical energy to move nutrients from areas of
low concentration to areas of high concentration.
C. Active transport moves nutrients from areas of high concentration to areas
of low concentration without the use of chemical energy.
D. Passive transport moves nutrients from areas of low concentration to areas
of high concentration without the use of chemical energy.
Answer:
Your correct answer would be A
Explanation:
Identify the charges of the different parts of an atom.
Answer:
The parts of an atom are protons, electrons, and neutrons. A proton is positively charged and is located in the center or nucleus of the atom. Electrons are negatively charged and are located in rings or orbits spinning around the nucleus.
Explanation:
emilythompson35464
hope this helps srry if it doesn't tho
5) Explain why the organisms at the top of a food chain (Eagles, for example) are more affected
by pollution in the ecosystem than organisms lower on the food chain (snails, for example)
Answer:
if pullution occurs, Fish may be consumed by birds and other animals and the pollution gets transferred through the food chains until it reaches humans.
compare and contrast the rate of photosynthesis in two areas.
Explanation:
its the 3 for the answers
What causes mass wasting?
Answer: What causes mass wasting is rain, or even earthquakes. These events can occur rapidly and move as a flow.
Explanation:
Answer:b
Explanation:
An element with 13 protons has an atomic mass of 27. Its number of neutrons is
The muscles that laterally rotate and depress the scapula, as in shrugging and lowering the shoulders, are the __________.
Guys please help me I really need to pass this test :( I will give branliest !!
Answer:
D. ability to sense and respond to change
its probably wrong but youll always be right if you stan bts :))) just kpop in general lol
Answer:
B
Explanation:
Not all living things take in oxygen, while the 5 characteristics of life include the ability to grow/develop, use energy for daily functions, and respond to changes in their environment. Therefore, B is the only option that is not a characteristic of all organisms. Hope this helps!
how religion influenced the causes and outcomes of the Salem Witch Trials.
Answer: They thought the cause was the devil speaking to these people and making them his "witches." The outcome was that people were afraid that the witches would do something to them so they put them on trial and hung them as well.
Hope this helps! :)
What is the process that leaves sediment in a new area called
Answer:
Deposition
Explanation:
Answer:
B
Explanation:
The answer is deposition
What does the cytoplasm do?
Answer:
The cytoplasm provides a medium for the organelles to remain suspended. The cytoplasm acts as a buffer and protects the genetic material of the cell and also the cellular organelles from damage caused due to movement and collision with other cells.
Explanation:
Which argument is correct about the growth of an organism?
Only genetic factors affect the growth of an organism.
Only environmental factors affect the growth of an organism.
The combination of genes and environmental factors affects the growth of an organism.
Genes remove the environmental factors that affect the growth of an organism.
Answer:
The answer is C
Explanation:
Just think about it. How do you grow?
If a tree grows 1/4 a foot in 1/12 of a year. How much will it grow in 3 years?
Answer:
3 feet
Explanation:
The tree grows 1/4 foot each month (1/12 of a year)
So the tree grows (1/4)(12) feet in a year. That is 3 feet.
In math:
(1/4) / (1/12)
(1/4) · 12 to divide by a fraction, invert and multiply
3
DNA is genetic material that makes up living things and folic acid
Answer:
The correct answer is option (C) The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
DNA or the deoxyribonucleic acid is made up of the nitrogenous bases called the purines and pyrimidines. Folic acid or the vitamin B9 is essential for the synthesis of these nitrogen bases of the DNA. A scientific experiment conducted always has two parameters, a dependent and a independent variable. A dependent variable in an experiment is a variable which is being tested and measured. In the experiment Jon is conducting, the amount of DNA becomes an dependent variable which is being tested and measured in presence of folic acid. An independent variable in an experiment is the variable that is changed or controlled in the scientific experiment to test the effects on the dependent variable. Here, folic acid becomes an independent variable as the amount of it is varied and tested to check the formation on DNA in bacteria. Thus, an independent variable always changes to check its effect on the dependent variable.
Explanation:
why is the matrix of the bone hard ?
Answer:
Due to the presence of mineral salt in the osteoid matrix, which is a crystalline complex of calcium and phosphate (hydroxyapatite). Calcified bone contains about 25% organic matrix (2-5% of which are cells), 5% water and 70% inorganic mineral (hydroxyapatite).
Explanation:
I think you answered on of my questions before or was on one of mine lol.
I am not sure but I recognize the pfp
The appearance of mineral salt in the osteoid matrix, which would be a crystalline complex of calcium and phosphate, contributes to bone hardness and rigidity.
What are osteoid matrix?The osteoid is the unmineralized, organic portion of the bone matrix that constructs prior to bone tissue maturation.
It usually initiate the formation of bone tissue by secreting the osteoid as a series of specific proteins.
Thus, due to this, matrix of bone is hard.
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Which type of organism can obtain energy
directly from any of the other organisms in an
ecosystem?
(1) herbivore
(3) producer
(2) decomposer (4) carnivore
Answer:
2 decomposer or 3 producer
Explanation:i kinda forgot lol
Option 2. Decomposers are the organisms that can obtain energy from any other organisms in an ecosystem as they breakdowns all type of dead organisms.
In an ecosystem, there are various kinds of organisms on the basis of their feeding behavior such as:
Producers: make their food and energy on their own.Herbivore - a primary consumer that depends upon producers for its energy and food. Carnivore - a secondary consumer that depends on herbivores or other consumers.Decomposers: organisms that get their energy and nutrition from any organism are dead or organic matters such as animal and plant wastes.Thus, the correct answer is - 2) decomposers.
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How do the potential energy and the kinetic energy change when the skateboarder is at the top or the bottom of the hill? Why do you think this change occurs?
Answer:
Potential at the top. Kinetic when going down the hill.
Explanation:
Its basically mechanical energy! While at the top you have the potential to go down and race down using kinetic energy.
Answer:
The potential energy (P.E) and the kinetic energy (K.E) are two types of distinct energy that is commonly observed in our day-today's life.
Usually, K.E is defined as a type of energy that is produced when an object is in motion. Where, as P.E is a type of energy that is stored in an object when that object is placed at a certain height.
In the given condition, when the skateboarder is at the top of the hill, then at that position, it is comprised of maximum P.E. As the he slowly comes down the hill, then the P.E gradually decreases, and the K.E gradually increases. This shows the P.E is slowly changing into the K.E. And as it comes down, the K.E increases, and eventually when he stops, then both the K.E and P.E becomes zero.
This changes occurs because energy can never be created nor destroyed, and it changes from one form to another.
Explanation:
What I wonder about movement of the Earth, sun, & moon?
Answer:
moon rotates and revolves around earth
earth rotates and revolves around sun
this rotation and revolution takes place in an oval shaped orbit..
Plant and animals cells have a lot in common. Compare and contrast the two cells. Select the features that you find in BOTH types of cells. A). Membrane,nucleus,cytoplasm. B). Membrane,chloroplast,nucleus. C). Cell wall, cell membrane, nucleus. D). Cell membrane and cell wall, chloroplast
Answer:
Membrane, nucleus, cytoplasm are found in both plants and animal cells because they are Eukaryotes.
HELPP :(
Which statement describes the most common ways in which students and professional scientists communicate the
results of their scientific research?
A.Students communicate results in oral reports to the class, and professional scientists communicate results in written
reports.
B.Students communicate results in scientific journals, and professional scientists communicate results in laboratory
reports.
O Students communicate results in laboratory reports, and professional scientists communicate results in scientific
journals.
O Students communicate results through secondary sources, and professional scientists communicate results through
primary sources.
The correct answer is C. Students communicate results in laboratory reports, and professional scientists communicate results in scientific journals.
Explanation:
Both students and scientists can carry out scientific research that involves studying a phenomenon by using the scientific method and scientific instruments. However, professional scientists and students differ in their level of knowledge and expertise in science. This makes scientific research made by scientists to have some differences in comparison to scientific research by students.
One of these differences is the way results are communicated. Indeed, students develop simple scientific research and the results are communicated in laboratory reports at school, colleges, etc. On the other hand, professional scientists develop complex research. Due to this, results are communicated in academic texts with strict criteria and that can be seen by other scientists, these are known as scientific journals.
Which parts of the water cycle require the water molecules to give away heat energy (cool
down)?
The part of the water cycle that require the water molecules to give away heat energy is : Condensation
Meaning of water cycle and condensation
A water cycle can be defined as the cycle that entails the continuous and consistent movement of on the the earth surface, which is above the earth surface and below the earth surface.
Condensation is a process where gasses changes to liquid. it is the cooling down of water molecules that are in form of vapor and converting to water in its liquid form.
In conclusion, The part of the water cycle that require the water molecules to give away heat energy is Condensation
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Directions: The diagram below shows how El Niño occurs when Pacific trade winds that are blowing east to west weaken. Use the diagram and your knowledge of science to answer any questions that follow.
The weaker trade winds cause
A
water off the coast of North America to become cooler.
B
water off the coast of Australia to become warmer.
C
water off the coast of Indonesia to become cooler.
D
water off the coast of South America to become warmer.
Answer:D
Explanation:
The diagram below shows how El Niño occurs when Pacific trade winds that are blowing east to west weaken water off the coast of South America to become warmer.
What is Pacific trade?The focus of American policy was the Trans-Pacific Partnership (TPP). a geopolitical shift by President Barack Obama toward Asia.
The TPP was slated to become the greatest free trade agreement in history, encompassing 40% of the world economy, but President Donald Trump withdrew the United States in 2017.
According to those who supported it, a deal of this nature would have increased American investment and trade abroad, boosted economic growth, reduced consumer prices, and produced new employment, all while furthering American strategic objectives in the Asia-Pacific area.
Therefore, The diagram below shows how El Niño occurs when Pacific trade winds that are blowing east to west weaken water off the coast of South America to become warmer.
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Hello please help will give brainliest to the correct answer!
Answer:
B, the cell membrane
Explanation:
The cell membrane dictates what enters and exits the cell. It keeps the important stuff (such as organelles) inside the cell, allows nutrients to enter the cell, and keeps unwanted ¨things¨ from entering. The tea bag does roughly the same thing.
It keeps the important contents inside (in this case the tea leaves), allows water to come inside, and keeps whatever is in the water outside of the teabag. Obviously the cell membrane is much more complicated than a tea bag, but the tea bag works as a nice analogy.
Which scenario best describes how climate trends might affect animal migration?
Animals found in the Arctic may move south.
Animals found at the equator may move north.
Animals found in higher elevations will move to lower elevations.
Animals found in lower elevations will stay in the same location.
Answer:
Answer is B
Explanation:
Animals either migrate northward or to higher elevations during rising temperatures as stated in the lesson
Radio and cell signals are bent around objects like mountains and tall buildings. This can allow you to still have a signal, even without a straight line to the tower. This bending of waves around a barrier or through a slit is called ______.
Group of answer choices
interference
refraction
reflection
diffraction
The bending of waves around a barrier or through a slit is called ( D ) ; Diffraction
Diffraction is the term used to describe the situation/phenomena whereby waves ( radio or cell signals ) emanating from an antenna is bent around obstacles between the antenna and the signal receiver.
Diffraction of waves is usually caused by the interference of waves with itself due to the presence of an obstacle. in order to get to the intended receiver the waves bends around the barrier through diffraction after constructive interference within itself.
Hence we can conclude that the bending of waves around a barrier or through a slit is known as diffraction
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Briefly explain what properties of the atoms in water (H2O) give water the ability to form hydrogen bonds. Your answer should include the words: electronegativity, hydrogen, oxygen, electrons, protons.
Answer:
Water molecules are polar, so they outline hydrogen bonds. This gives water great properties, such as a for the most part high bubbling or boiling point, tall specific warm, cohesion, grasp, and thickness. Hydrogen has an electronegativity of 2.0, though oxygen has an electronegativity of 3.5. The refinement in electronegativities is 1.5, which infers that water can be a polar covalent molecule. In water, an electron from each of the hydrogen particles is drawn towards the oxygen particle. Protons, as unequivocally charged hydrogen particles, move outstandingly rapidly in water from one water molecule to the taking after, which is why the conductivity of water is modestly tall.