A biologist has mixed the polysaccharide agarose with other components to create a gel.
Which choice best describes the next step in gel electrophoresis?
A.The mixture is poured into a special tray and allowed to cool and solidify.
B.An electric current is run through the gel.
C.The gel is placed in a box with positive and negative electrodes.
D.DNA samples are loaded into wells.
Answer:
a
Explanation:
n.a
If the membrane was completely permeable,the concentration inside the cell would be about the same as the outside. Give reason?
If the cell membrane is permeable to some solute, this means the solute is free to move in or out of the cell, depending on its concentration gradient. The solute will move by diffusion from the area with high concentration to the area with low concentration. So if the concentration of this solute is higher outside of the cell compared to the inside, then it will move into the cell until its concentration is equal on both sides.
The diagram represents several stages of the cell cycle.
G,
s
G
M
During the cell cycle, normal cells exit the G1 phase and enter the Go phase where they rest. Typically,
cells will reenter the cycle at G1 prior to going on to S phase. However, abnormal cells such as cancer
cells, may not be allowed to enter the Go phase to rest.
As a result, these cells will most likely -
F. mutate during G2 phase
G. continuously repeat the cycle
H. die after DNA replication
J. fail to complete mitosis
Abnormal cells such as cancer cells, may not be allowed to enter the G0 phase to rest. These cells will most likely continuously repeat the cell cycle.
What do you mean by Cell cycle?The Cell cycle may be defined as the entire sequence of events happening from the end of one nuclear division to the beginning of the next nuclear division.
The abnormal cell undergoes a repeated cell cycle because they express an enzyme called telomerase that switches the wearing down of chromosome ends.
This happens normally in the cell cycle, and after multiple repeated cycles, such abnormal cell undergoes apoptosis.
Therefore, abnormal cells such as cancer cells, may not be allowed to enter the G0 phase to rest. These cells will most likely continuously repeat the cell cycle.
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Microtubules are groups of proteins that provide structure to cells and are important during cell division. Which of the following pathways produces microtubule proteins in cells?
A. DNA → polypeptide → mRNA → protein
B. DNA mRNA → polypeptide → protein
C. mRNA → DNA → polypeptide → protein
D. mRNA → polypeptide → DNA → protein
explain in the different between barried method of contracetption and hormonal method contraception and given example for contraception method
A barrier method of contraception is a method that prevents the contact of sperm and ovum with the help of barriers. Examples include spermicidal creams, cervical caps, and condoms.
What do you mean by Contraception?Contraception may be defined as the method of restricting the number of children parents have. It is also comprehended as birth control or fertility control. It works in such a way that it prevents the process of successful fertilization.
Hormonal method contraception may be defined as those methods that alter the normal function and effectiveness of hormones like estrogen and progesterone. Examples include intrauterine devices, pills, injections, etc.
Therefore, the difference between the barrier method of contraception and the hormonal method of contraception is described above.
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describe how dna can be used to classify organisms
Scientists can use DNA sequences to help determine if they have discovered a new species. Scientists can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.
What type of forensic evidence was recovered during the bomb set off at the New Mexico facility on the video that was similar to the evidence obtained at the Boston bombings and how did this evidence allow researchers to connect other pieces of evidence to the same bomb
Answer:
they were pressure cooker bombs
Building proteins and DNA is the reason organisms need what substance?
Answer:
Nitrogen
Explanation:
All living organisms need nitrogen in order to build proteins and build DNA.
Some animals (most) get nitrogen by eating plants I believe.
Which statement best explains why DNA is replicated within the cell?
Explanation:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. The replication process relies on the fact that each strand of DNA can serve as a template for duplication.
Some resources are not readily available for conversion to energy. Which choice below would MOST likely limit the amount hydroelectricity that can be produce and used in the area?
A- Sunlight
B-Wind
C-water
D-biomass
The amount of water is MOST likely limit the amount hydroelectricity that can be produce and used in the area.
What is hydroelectricity?Hydroelectricity is the electricity which is generated from the water.
Hydroelectricity converts the kinetic energy of moving water current to electrical energy in a dynamo.
Therefore, the amount of water is MOST likely limit the amount hydroelectricity that can be produce and used in the area.
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The images stored on microfilm and microfiche are so large that they can be read without a microfilm or microfiche reader. Group of answer choices True False
The images stored on microfilm and microfiche cannot be read without a microfilm reader : i.e. statement in the question is False
What is a microfilm ?A microfilm is film which contains photographic records stored in a small scale order than the natural scale of a graphic/printed matter. Images stored on microfilm and microfiche are so small that a microfilm or microfiche reader is required to read them.
Hence we can conclude that statement in the question is False.
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How do you think water can become polluted?
Pleasee help
how is climate change a feedback loop ?
Answer:
tbh i dont even know
Explanation:
The statement : On Earth, objects that are heavier than air will always fall toward the ground is the____ of gravity.
A. law
B. conclusion
C. theory
D. hypothesis
Answer:
a the law of gravity
On Earth, objects that are heavier than air will always fall toward the ground is the law of gravity.
What is gravity?
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
Newton’s law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.it means object are heavier than air will always fall ground because of law of gravitation.
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when does the embryo form?
A. At the end of the third trimester
B. A few days after fertilization
C. In the second trimester
D. At the end of the first trimester
Which statement best describes an interaction with the geosphere?
Glaciers shape a mountain valley.
Rain increases acidity of a lake.
Carbon dioxide dissolves in oceans.
Animals release carbon dioxide into the air.
please answer my question correctly
#1
Sea breeze part
When the land gets warmer in day time the warm air goes up To fill the free space created underneath the middle atmosphere cold air breezes from ocean surface towards land to fill up the free space .This is the reason why humidity remains at peak during day time on beach sides#2
Land breeze part
In night time the opposite of day time appears ,the ocean surface gets warmer.The warm air rises upTo fill up the free space cool air from land surface goes there .Humidity remains less so we feel chill during night timeAnswer:
#1
Sea breeze part
When the land gets warmer in day time the warm air goes up
To fill the free space created underneath the middle atmosphere cold air breezes from ocean surface towards land to fill up the free space .
This is the reason why humidity remains at peak during day time on beach sides
#2
Land breeze part
In night time the opposite of day time appears ,the ocean surface gets warmer.
The warm air rises up
To fill up the free space cool air from land surface goes there .
Humidity remains less so we feel chill during night time
Genes, chromosomes, and DNA are important structures for processes related to heredity and reproduction. How are these structures related?
A
Many chromosomes make up a gene, and many genes make up DNA.
B
A chromosome is the same thing as a gene and both are made of DNA.
C
DNA is made up of chromosomes, and chromosomes are made of genes.
D
Genes are sections of DNA that make up a chromosome.
Answer:
C
DNA is made up of chromosomes, and chromosomes are made of genes.
Which of the following had the highest social hierarchy in Japanese culture during this time period?
A. Peasants and Artisans
B. Merchants
C. Samurai
D. Emperor
The arctic fox is different from the brown fox. the color of the arctic fox’s fur changes to brown during the summer. the fur remains white during winter. the arctic fox lives in snow-bound regions, while the brown fox lives in forests. which three ways do these adaptations enable both foxes to survive in their surroundings? photograph on the left shows an arctic fox on a snow-covered landscape and photograph on the right shows a brown fox in a forest. the brown color camouflages the arctic fox when snow melts during the summer. the white color camouflages the arctic fox during the winter. the brown color camouflages the brown fox in the forest. the white color camouflages the arctic fox when snow melts during the summer. the brown color camouflages the brown fox in snow-bound regions.
The arctic fox is different from the brown fox. why brown color camouflages brown fox in forest and white color camouflages arctic fox in snowy regions.
What is camouflage?Camouflage is the set of techniques and methods that allow a given organism or object to remain indistinguishable from the environment that surrounds it. Examples range from the woody colors of the stick bug to the green-brown spots on the uniforms of modern soldiers.
With this information, we can conclude that the arctic fox is different from the brown fox. why brown color camouflages brown fox in forest and white color camouflages arctic fox in snowy regions.
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why farmers are manuring at the roots of the plant
Answer:healthy plants
Explanation:the farmers use raw manure on their fields because it is an excellent source of nitrogen (N), phosphorus (P) and potassium (K), which are all nutrients necessary for plants to grow and thrive.
Answer:
The reason why farmers put manure at the roots of the plants is because that is how most of the nutrition is taking up into the plant. Most of the minerals in the earth are absorbed into the plant for usage by the roots which is why the manure would be placed where the roots are. However, it's important to not put too much because that can actually cause the roots to get burned because there is too much minerals so it's important to keep a balance.
Mackenzie notices that her best friend can apply paint in a perfectly straight line on a ceramic pot. Mackenzie knows
that paint is hard to control at times, but she tries it anyway and ends up stroking a straight line on first try, just like her
best friend. Did Mackenzie successfully model her best friend's painting skills?
No, because she didn't ask her friend for help.
Yes, because she observed her friend and knew she could do better.
Yes, because she was able to draw a straight paint line just as her friend did.
No, because she didn't have to try more than once.
what kind of mutation does this image represent
Answer:
A. Deletion
Explanation:
The kind of mutation that this image represent is deletion. The correct option is A.
What is mutation?A variation in the usual DNA sequence at a specific gene locus. Although the term has a negative connotation, mutations (including polymorphisms) can have a negative, positive, or neutral effect on cell function.
Mutations can occur as a result of errors in DNA replication during cell division, mutagen exposure, or viral infection.
Germline mutations (those found in eggs and sperm) can be passed on to offspring, whereas somatic mutations cannot.
In genomics, a deletion is a type of mutation that involves the removal of one or more nucleotides from a segment of DNA. A deletion can result in the loss of any number of nucleotides, ranging from a single nucleotide to an entire chromosome.
Thus, the correct option is A.
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Your question seems incomplete, the missing part is attached below as image:
Name the organelles.
Answer:
A: Nucleus
B: Cytoplasm
C: Vacuoles
D: Cell Membrane
E: Mitochondria
Explanation:
What is the best part about biology
Answer:
it is life
Explanation:
it provides an in depth scientific understanding of how living and non-living organisms interact
Which describes how viruses reproduce
when using a living host?
A. they cannot reproduce
B. slowly
C. with non-living material
D. quickly
Answer:
c.po
correct me if I'm wrong but Mao jdt aho NASA isip nho..tnx
What are Exxon-Valdez and Deepwater Horizon?
A. The new desalination plants in California to fight the drought.
B. The source of massive oil spills.
C. Solar energy companies set to end reliance on oil.
help please
BIOLOGY!!
Answer:
provides protection and support
Explanation:
PLEASE HELP FAST I AM ON A TIMER THANK YOU!!
When we analyzed haplotypes detected in mtDNA from the various sites where juncos lived, we found patterns in the data. We noticed that the more time that passed, the more mutations occurred. Mutations in DNA lead to differences in the juncos. Examine the data from the site below and circle the best claim.
(PLEASE LOOK AT PICTURE TO SEE THE DATA)
A.) Junco A and Junco G are very closely related—their DNA does not show many mutations.
B.) Junco A and Junco F are very closely related—their DNA does not show many mutations.
C.) Junco A and Junco N are not very closely related—their DNA shows many mutations.
D.) Junco A and Junco M are not very closely related—their DNA shows many mutations.
Answer:
The answer is c. Here is why. Look at my explination below
Explanation:
When you look at the table you can see which one is most looked at, and use the answer to find the data table, use that and you shall get your answer, my friend!
based on the data, what can you infer about the relative pH of the stomach?
The pH of stomach is important as it helps to induce the digestive enzyme called pepsin. The presence of HCL i.e., hydrochloric acids in stomach results in the pH of stomach to become acidic which range from 1.5 to 6.5 values.
What is the pH level of stomach?When the bolus enters the stomach, it aids the release of gastric juice having enzymes, mucous and HCL.
The upper and lower parts of stomach have varying pH values. Upper part has a pH of 4−6.5, while the lower part is with a pH of 1.5−4.0 which is highly acidic due to HCL.
Thus, the relative pH of stomach is acidic ranging from value 1.5 to 6.5.
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