What is gel electrophoresis used for? Select all that apply.
O A) It is used to sort DNA strands.
B) It is used to produce more DNA strands.
C) It is used to measure DNA strands.
D) It is used to break down DNA molecules.
Answer:
used to separate mixtures of DNA, RNA, or proteins according to molecular size
Gel electrophoresis is used for the separation of genetic material present in the cell such as DNA, RNA and even proteins. Thus, the correct option is A.
What is Gel electrophoresis?Gel electrophoresis is a technique which is used to separate the genetic material such as DNA fragments, RNA and proteins on the basis of their size and charge. Gel Electrophoresis involves running an electric current through a gel containing the molecules of interest in it.
The principle of Gel electrophoresis is that the DNA or protein sample to be separated is loaded on to a porous gel placed in an ionic buffer. On the application of electric charge, each of the molecules having different size and charge will move through the gel at different speeds and therefore separates out.
Therefore, the correct option is A.
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What is the characteristic of tropical rainforest?
Explanation:
The tropical rainforest biome has four main characteristics: very high annual rainfall, high average temperatures, nutrient-poor soil, and high levels of biodiversity (species richness)Choose which assumption must be made in order for this estimate of broad-sense heritability to be correct.
a. The phenotypic variance of the genetically identical plants is the same as the genetically variable population.
b. The genetic variance component is strictly the result of additive genetic variance.
c. The environmental variance of the genetically identical plants is the same as that of the genetically variable population.
d. There is no phenotypic variance associated with the environment.
The assumption 'environmental variance of the genetically identical plants is the same as that of the genetically variable population' is CORRECT. It is used to estimate the variation due to genetic factors.
Heritability (h2) refers to the proportion of the variability of a given phenotypic trait due to genetic factors.
Broad-sense heritability is affected by genetic and environmental factors.
Broad-sense heritability can be estimated as H² = VG/VP, where VG and VP represent genetic variability and phenotypic variability, respectively.
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Explain why water is essential for the light reactions.
Answer:
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Explanation:
Water is important for photosynthesis because it the source of hydrogen for the sugars created through photosynthesis
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Which chemical produced by the burning of fossil fuels causes acid rain?
Water
Nitric oxide
Carbon dioxide
Phosphatys
Answer:
it's carbon dioxide good luck.
Down's syndrome occurs because of a(n)
missing sex chromosome
extra sex chromosome
additional 21st chromosome
additional 18th chromosome
Answer:
C.Additional 21st chromosome
Explanation:
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Drag each item to indicate whether it exhibits fracture or cleavage.
Answer:
From left to right
Explanation:
Cleavage, cleavage, fracture
The first item exhibit a cleavage. The second item exhibit a cleavage. The third item exhibit a fracture.
In mineral science, Cleavage is the process by which a mineral breaks or splits through smooth planes with a pattern because the material is stratified in a layered pattern. It generally seems regular since it fractures along its plane of weakness.
A fracture happens when a mineral splits with fractures and does not produce a particular definite shape. It frequently emerges in an erratic and irregular pattern.
From the three picture given, the first and the second item exhibit cleavage, and the third item exhibit fracture.
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What's biology?
Biology is a natural sciences that deals with the study of living things.
Answer:
True
Explanation:
You study plants, animals, and cells in biology if I'm not mistaken.
The closing on your ad gives details about your services.
True
False
Answer:
True
Explanation:
In the closing, often a brief explanation is given on the company's name what they do how u can contact them and maybe some other information
P.s I do not take this subject
In gymnastics, a gymnast must be able to balance on a balance beam. What is the best explanation for what forces are acting on the gymnast on a balance beam? (2 points)
The forces are balanced when the force of gravity pulling you down is the same as the force of the balance beam pushing you up.
The forces are unbalanced when the force of gravity pulling you down is the same as the force of your legs pushing you up.
The forces are balanced when the force of gravity pulling you down is stronger than the force of the balance beam pushing you up.
The forces are unbalanced when the force of gravity is reduced to the same force as the balance beam pushing you up.
Answer:1
Explanation:Because gravity always pulls you down even when your standing on an object.
A hummingbird may need to consume up to 50% of its body weight in sugar each day, just to meet its energy needs. Some of this energy is stored and some is used for metabolic activities, but much of the energy is
A)
converted into amino acids needed for the production of starch
B)
released as heat energy back into the hummingbird's environment
C)
changed into radiant energy, which can be used by plants for photosynthesis
D)
used to synthesize inorganic compounds necessary for cellular respiration
Answer:
A
Explanation:
Hey, I need help with these questions please:
Answer:
on the human body
Explanation:
i think.....
The small size of cells
A. Allows for efficient transport of materials
B. Causes food to be broken down slowly
C. Slows down the removal of wastes
D. Allows for fewer cell organelles
Answer:
A
Explanation:
this is because, in smaller organism their SA/V ratio is large hence they have efficient transport of materials within their cells
What would most likely happen to a person who is not getting enough essential amino acids in his or her diet?
The body would synthesize the amino acids.
Muscle growth and repair would be limited.
Stored protein would break down.
The formation of proteins would increase
Answer:
Muscle growth and repair would be limited.
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In 3-5 sentences, describe the advantages and disadvantages of these maps in modeling mitosis.
Answer:
Explanation:
you haven't put the image, however mitosis is the splitting of one cell into two identical daughter cells (duplicating the DNA) - hope this helps!
Which side is hypertonic ? A or B ?
Which side will gain water
What is c ?
Answer:
1-b
2-b
3-phospholipid bilayer
B side is hypertonic. It will gain water. C is Phospholipid layer.
What is Hypotonic Solution?
A hypotonic solution is a type of solution that has a lower osmotic pressure than any other solution to which it is compared. It is a solution in which a small amount of solute passes across a semipermeable membrane compared to the amount of solute in the other solution.
If the solute concentration outside the cell is lower than inside the cell, these solutes cannot cross the membrane, so the solution is hypotonic to the cell.
The cell membrane consists of a phospholipid bilayer containing embedded proteins present between these two solutions where a hypotonic solution has a relatively low concentration of solutes.
Thus, B side is hypertonic. It will gain water. C is Phospholipid layer.
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Describe DNA replication. Include all relevant aspects. When does this process occur? and why
What are some possible applications of therapeutic cloning?
Answer:
Hey mate....
Explanation:
This is ur answer....
Other applications of therapeutic cloning include the diagnosis of epigenetically triggered cancer and the tailoring of a treatment using SCNT, the creation of animal models of human diseases, and could eventually lead to tissue engineering of organs de novo.
Hope it helps!
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do you think carbon sinks can ever completely reverse global warming, why or why not?
Answer:
Explanation:
Framed in this way, the problem of climate change becomes not one of simply producing greenhouse gas, but how quickly we do so when compared with the Earth’s natural ability to soak it up again. And it makes that natural ability – the continuing capacity of forests and oceans to act as carbon sinks – as significant a factor in deciding the likely course of rising temperatures in the near future as intended controls on our greenhouse gas emissions. Yet many people are unaware of this side of the carbon balancing equation. And if they are, they take it for granted – they expect that forests and oceans and other carbon sinks will continue to act as our environmental get-out-of-jail-free card.
Or, more accurately, our go-to-jail-slightly-slower card. While sinks have managed to grab about half the carbon released as human pollution in recent centuries, the rest steadily accumulates in the atmosphere. The forests and oceans simply can’t suck it in fast enough. At the last count, atmospheric levels of carbon dioxide registered almost 412 parts per million (ppm) and rising. That’s a 47 per cent jump since the beginning of the industrial age, when the concentration was near 280 ppm, and an 11 per cent rise since just 2000, when it was near 370 ppm. Without our natural carbon sinks working to buffer the impact, that figure would probably be closer to 700ppm today.
It makes sense, then, that the future behavior of Earth’s massive carbon sinks – and specifically the question of whether they will continue to bail us out by taking in carbon dioxide – is a key topic of research for scientists. How will tropical forests respond to warmer temperatures? Will ocean currents continue to carry carbon to the depths? What happens to the pace of climate change if the carbon-catching capacity of these sinks weakens?
Are humans a dead end host for streptococcus pneumonia?
Streptococcus pneumoniae is a major human pathogen responsible for enormous global morbidity and mortality. Despite this, the pneumococcus makes up part of the commensal nasopharyngeal flora.
Streptococcus is a bacterium of a genus that includes the agents of souring of milk and dental decay, and hemolytic pathogens causing various infections such as scarlet fever and pneumonia.
The molecule is illustrated in figure ________.
A) is a saturated fatty acid B) stores genetic information
C) will be liquid at room temperature D) is a carbohydrate
The molecule is illustrated in the figure is an unsaturated fatty acid. These molecules are liquid at room temperature (Option C). It is for that reason that unsaturated fatty acids are called oils.
The unsaturated fatty acids are liquid at room temperature, thereby they are known as oils (they are mainly found in plant fats).
The unsaturated fatty acids have one or more double bonds of carbon to carbon atoms.
Conversely, saturated fatty acids are solid at this temperature and do not have double bonds (they are mainly found in animal fats).
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the location where the restriction enzyme “cuts” is called a..
What is the genetic makeup of offspring resulting from mitosis?
A. They are genetically identical to the parent cell.
B. They have half as many chromosomes as the parent cell.
C. They have twice as many chromosomes as the parent cell.
D. They share half their genes in common with both parents.
Answer:
Mitosis means the offspring is identical! So answer is A!
Which of the following pays a fixed rate of return
Answer:
Reinvestment of coupon payments
una característica que se puede observar o medir sin cambiar la composición de la materia es una propiedad química ¿cierto o falso ?
Answer:
Falso, una propiedad química cambia no solo su apariencia, sino que la cambia por completo. Por ejemplo, la madera sigue siendo madera hasta que la pones al fuego y QUÍMICAMENTE se convierte en col. =)
Explanation:
1. In human beings, a downward-pointed frontal hairline ("widow's peak") is a heritable trait. A
person with a widow's peak always has at least one parent who also has this trait, whereas
people with a straight frontal hairline may occur in families in which one or even both parents
have widow's peaks. When both parents have a straight frontal hairline, all children also have
a straight hairline. Using A and a to symbolize alleles for this trait, what is the genotype of an
individual without a widow's peak? (Show your work)
The genotype of an individual without a widow's peak would be aa.
A person with widow's peak has. at least a parent with the trait. When both parents have a straight frontal hairline, all the children also have a straight frontal hairline.The above features are indications that widow's peak is a dominant trait.
Since A and a are used to represent the alleles, AA or Aa will be the genotype of individuals with widow's peak while only aa will be the genotype of individuals with straight frontal hairlines.
In other words, individuals without a widow's peak will have aa as genotypes.
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What is the difference between diffusion and osmosis?
What makes a membrane semipermeable?
What characteristics of a molecule affect whether it can pass through the plasma membrane of a cell?
In the simulation, when protein molecules were evenly distributed on both sides of the membrane, was the solution isotonic, hypertonic, or hypotonic?
Which direction was water flowing?
In the simulation, when protein molecules were more highly concentrated on the inside of the cell than outside of the cell, was the solution isotonic, hypertonic, or hypotonic?
Which direction was water flowing?
Why is it important that the plasma membrane surrounding cells is semipermeable?
What would happen if it were not semipermeable?
1) Diffusion : Is the movement of molecules / ions from a region of higher to lower concentration. It may or may not occur across a semi permeable membrane.
In diffusion there is no challenge involved as it is along the concentration gradient, but in active transport movement of molecules occur against concentration gradient ie; from lower to higher concentration.
2) For active transport, energy is vital for movement, in this case protein molecules function as molecular pumps to enable the cell accumulate glucose/ions, against concentration gradient. Here metabolic energy ATP is required.
3)Facilitated diffusion is a type of passive transport in which ions/molecules cross the semi permeable membrane because permeases present in the membrane facilitate the transport.
Like simple diffusion facilitated diffusion doesn't require metabolic energy and simply occurs across the concentration gradient.
4) Osmosis : is movement of water from hypotonic solution (lower concentration) to hypertonic solution (higher concentration) through a semi permeable membrane.
The cell membrane being permeable to water allows to and from movement of water molecules along the concentration gradient.
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Your answers may vary, but these sample answers are a model to follow.
Diffusion is the process of a substance moving from an area of high concentration to an area of lower concentration. Osmosis is a type of diffusion where water moves across a semipermeable membrane still from an area of high concentration of water to an area of lower concentration of water. This corresponds to water moving from an area with a low concentration of solute to an area with a higher concentration of solute.
A semipermeable membrane allows some substances to pass through it.
The plasma membrane of a cell allows small uncharged molecules to pass through it, but not large molecules and not charged ions.
The protein molecules were evenly distributed on both sides of the membrane, so this solution was isotonic.
In an isotonic solution, water moves both in and out of the cell, which was observed in the simulation.
The protein molecules were more highly concentrated on the inside of the cell, so this solution was hypotonic.
In hypotonic solutions, water moves into the cell to help dissolve the higher amount of solute inside the cell, which was observed in the simulation.
A semipermeable cell membrane is important to allow some molecules, like proteins, to be more highly concentrated inside the cell than outside the cell. If the cell membrane were permeable, the molecules on the inside of the cell would exit the cell and be evenly distributed in the cell and in its environment.
If the cell membrane were not permeable at all, the cell would not be able to receive nutrients from its environment.
Diffusion and osmosis has one difference which is the presence of semi-permeable membrane.
What is the difference between diffusion and osmosis?Diffusion is the movement of particles from an area of higher concentration to one of lower concentration while on the other hand, osmosis is the movement of particles from a semipermeable membrane.
Cell membrane is selectively permeable which only allows some molecules inside the cell because of its structure. So we can conclude that diffusion and osmosis has one difference which is the presence of semi-permeable membrane.
When protein molecules were evenly distributed on both sides of the membrane, the solution will be isotonic because of the same quantity on both sided. There is no movement of water in the body.
When protein molecules were more highly concentrated on the inside of the cell than outside of the cell, the solution will be hypotonic because of the less amount of water in the body.
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Answer:
- 1). Diffusion is the process of a substance moving from an area of high concentration to an area of lower concentration. Osmosis is a type of diffusion where water moves across a semipermeable membrane still from an area of high concentration of water to an area of lower concentration of water. This corresponds to water moving from an area with a low concentration of solute to an area with a higher concentration of solute.
- 2).
a). A semipermeable membrane allows some substances to pass through it.
b). The plasma membrane of a cell allows small uncharged molecules to pass through it, but not large molecules and not charged ions.
- 3).
a). The protein molecules were evenly distributed on both sides of the membrane, so this solution was isotonic.
b). In an isotonic solution, water moves both in and out of the cell, which was observed in the simulation.
- 4).
a). The protein molecules were more highly concentrated on the inside of the cell, so this solution was hypotonic.
b). In hypotonic solutions, water moves into the cell to help dissolve the higher amount of solute inside the cell, which was observed in the simulation.
- 5).
a). A semipermeable cell membrane is important to allow some molecules, like proteins, to be more highly concentrated inside the cell than outside the cell. If the cell membrane were permeable, the molecules on the inside of the cell would exit the cell and be evenly distributed in the cell and in its environment.
b). If the cell membrane were not permeable at all, the cell would not be able to receive nutrients from its environment.
Albinism is caused by a recessive mutation. If two albino mice mate and produce offspring with normal pigmentation, what could you conclude about the parental mutations
Answer: A geneticist studies a series of families in which both parents are normal and at least one child has albinism. The geneticist reasons that both parents in these families must be heterozygotes and that albinism should appear in of the children of these families. To his surprise, the geneticist finds that the frequency of albinism among me children of these families is considerably greater "Than . Can you think of an explanation for the Thigher-than-expected frequency of albinism among These families?
Explanation:
Some animal species are divided into what
A.varieties
B.sub species
C.identical species
D.twin species
Answer:
YEssir
Explanation:
cause it is
which type of organism can use photosynthesis to make food
Answer:Plants
Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis (Figure 1). Because they use light to manufacture their own food, they are called photoautotrophs (literally, “self-feeders using light”).
Explanation:
Answer:
All plants with green leaves, from the tiniest mosses to towering fir trees, synthesize, or create, their own food through photosynthesis. Algae, phytoplankton, and some bacteria also perform photosynthesis. Some rare autotrophs produce food through a process called chemosynthesis, rather than through photosynthesis.