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Answer:

1. Prokaryotic chromosomes are found in the nucleoid of prokaryotic cells, and they are circular in shape.

Unlike eukaryotic cells, prokaryotic cells don’t have a membrane-bound nucleus. Instead, their genetic material can be found in a region of the cytoplasm called the nucleoid. A prokaryotic cell typically has only a single, coiled, circular chromosome. However, there are a few prokaryotes that have more than one—Vibrio cholerae, the bacterium that causes cholera, has two circular chromosomes.

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Prokaryotic Chromosome

Prokaryotic cells typically have a single, circular chromosome located in the nucleoid.

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2. Each chromosome contains a molecule of DNA that is supercoiled and compacted by nucleoid-associated proteins (NAPs).

Prokaryotic cells may have only one chromosome, but that one chromosome is a very long DNA molecule that must be condensed to fit inside a tiny space. In a eukaryotic cell, DNA wraps around clusters of histone proteins. However, most prokaryotic cells don’t use histones to help with DNA storage. (Some Archaea do, but they are the exception, rather than the rule.)

Like eukaryotic DNA, prokaryotic DNA undergoes supercoiling, but it is not wound around histone clusters first. Supercoiling uses the application of tension to twist a DNA molecule, so it wraps around itself, creating loops.

The folding of prokaryotic DNA is facilitated by nucleoid-associated proteins (NAPs) instead of histones. NAPs are proteins within the nucleoid that can bind to the DNA molecule, introducing bends and folds, and they are involved with processes such as DNA replication and transcription.

3. Prokaryotic cells are haploid, meaning they do not have chromosomes that occur in homologous pairs.

Most prokaryotic cells have just one chromosome, so they are classified as haploid cells (1n, without paired chromosomes). Even in Vibrio cholerae, which has two chromosomes, the chromosomes are unique from one another. That is, they are not a homologous pair, because they don’t contain the same genes in the same locations.

Many prokaryotes, such as bacteria, reproduce via binary fission. This is a method of asexual reproduction that is similar in its end result to mitosis—two daughter cells result, each with the same number of chromosomes as the parent cell. However, when bacteria undergo binary fission, no mitotic spindle forms. In addition, the replication of the prokaryotic cell’s chromosome can occur during the fission process.

4. Prokaryotic cells can also carry small molecules of DNA called plasmids.

Plasmids are small, circular DNA molecules that contain the cell’s nonessential genes. Although plasmids can occur in a variety of sizes (ranging from around a thousand base pairs to hundreds of thousands), they usually only have a small number of genes. Antibiotic resistance is a trait that is frequently attributed to genes on plasmids.

In addition to their single chromosome, prokaryotic cells often have small, circular DNA molecules called plasmids.

The genetic material of plasmids is separate from that of the cell’s main chromosome, and they can replicate independently of that chromosome. When a prokaryotic cell with a plasmid divides, the daughter cells each receive a copy of the plasmid, along with its regular chromosome.

5. Prokaryotic and eukaryotic chromosomes differ in their shape, size, number, and location within the cell.

Here’s how the characteristics of eukaryotic and prokaryotic chromosomes compare.

 Eukaryotic Chromosome Prokaryotic Chromosome

Shape Linear Circular

Size Large Small

Number Multiple Single

Location Nucleus Nucleoid (region in cytoplasm)

Storage proteins Histones Nucleoid-associated proteins

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 External Sources

“The Precarious Prokaryotic Chromosome” from the Journal of Bacteriology.

A video on DNA topology and supercoiling from the MITx Molecular Biology course.

“Nucleoid Associated Proteins: The Small Organizers That Help to Cope With Stress” from Frontiers in Microbiology.

An article from Scitable/Nature Education on genome packaging in prokaryotes.

An article from Khan Academy about binary fission in bacteria.

“The Vibrio cholerae genome contains two unique circular chromosomes,” from the Proceedings of the National Academy of Sciences.

Definitions of plasmids from Scitable and the National Human Genome Research Institute.

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Explanation:

Prokaryotic chromosomes are found in the nucleoid of prokaryotic cells, and they are circular in shape.

Answer:

b

Explanation:

Hope this helps

the answer is 0 and 1 like a computer

Answer:

I think Hard

Explanation:

Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous iron may also be present; oxidized to the ferric form, it appears as a reddish brown stain on washed fabrics and enameled surfaces.

Answer:

It is confirmed that epigenetic changes play a significant role in imprinting disorders and food like folic acid, vitamin B12 and other certain food can affect the DNA methylation process.

Demethylation of DNA has been effective to human disorders even though methylation is an important and natural process, may be useful for regulating one gene which can lead to various changes that need to be avoided.

Answer:

Your answer should be seafloor spreading

Explanation:

Hope this helped :)

Answer:

If animals of euphotic has to survive in abyss zone, There are adaptions given below ; They must adapt to temperature. They should adapt to water which is marine one. The animals should adapt to pressure in water

Answer: The possible outcomes of septic emboli in the system is it's ability to cause metastatic infections in various organs of the body.

Explanation:

Infective endocarditis is defined as the infection of the lining of the interior surfaces of the heart chambers ( the endocardium). This infection is usually caused by microorganisms such as bacteria and fungi. One of the major types of complications of infective endocarditis is septic embolism.

Septic embolism is the fungal or bacterial infection of a mass ( blood clot, air bubbles or foreign materials) which breaks off from their original location that has been infected for a long period of time ( example is the infective endocarditis).

The possible outcomes of septic emboli in the system is it's ability to cause metastatic infections in various organs of the body. The organs and organ systems that are mostly affected includes:

--> Central Nervous System,

--> Bone and joint structures

--> Liver,

--> Kidney,

--> Sleen,

--> Lungs and

--> Coronary Vessels.

Depending on the location of the detached emboli in the body complications caused by this effect includes: acute diffuse glomerulonephritis, bacterial meningitis,splenic abscess, pleuritic chest pain,hepatic abscess just to mention a few. I hope this helps, thanks.

Answer:

T (True)

Explanation:

Answer:

separates the interior of all the cells

Answer:

it might be tissue

its tissssssssue

Answer:

a. tapetum lucidum

Explanation:

This is a reflective layer behind their eyes that allow them to see much more than diurnal primates

Answer:

Tapetum Lucidum

Explanation:

took the quiz

Answer:

The mountains at Pinnacles National Monument  and the mountains at Tejon Pass became separated from each other after suffering a transforming process, in which plates slid laterally against each other along the fault.

Explanation:

The tectonic plates theory is based on the continual movements of the crust and might explain the movement of the different plates, and their directions and interactions.

Plates are limited by three different ridges or borders that differ in the type of movement they produce.

A subduction process first originated all the mountains. This process took a lot of time and it in different stages. But once it concluded, a new process followed the first one. The transforming process, which occurred when the Pacific plate collided against the occidental ridge of the North American plate until it broke along the tension line. This process involves a movement of plates in which they slide laterally against the others along a line known as a fault.

As you can see on the map, the Pinnacles National Monument and the mountains at Tejon Pass are placed on opposite sides of the fault line. At first, they were together, and then by the transforming process, the plates moved along the fault separating them.

Answer:

B

Explanation:

Answer:

b

Explanation:

Answer:

They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.

Explanation:

Hope this help :)

Answer:

200 to 500 milliseconds

Explanation:

Attentional blink is a phenomenon that puts time-related limitations to the ability to utilize visual attention. When an individual must identify two visual stimuli presented one after another, the accuracy is very poor for the second stimulus if it occurs within 200 to 500 milliseconds of the first stimulus.

So, in our question, the gap is filled by 200 to 500 milliseconds.

Answer:

leaves the crust undeformed

Explanation:

An epeirogenic change is one that leaves the crust undeformed. They are notable for creating the continental craton where little to no tectonic activities forms.

Answer:

B NOT D

Explanation:

Answer:

Photosynthesis

Explanation:

Bacteria can obtain energy and nutrients by performing photosynthesis, decomposing dead organisms and wastes, or breaking down chemical compounds.

Answer:

Explanation:

In any form of experimental research where data is being analyzed, there needs to be only one variable present and each group in the experiment needs to have the same factors and environment as the others. That way the single variable can be isolated and the data properly analyzed. That is why it is important for the mass of each food to be the same, since the foods are already different variables the rest of the factors in the experiment need to be the same including the mass of each food.

Answer:

Organism cloning. Organism cloning (also called reproductive cloning) refers to the procedure of creating a new multicellular organism, genetically identical to another. In essence this form of cloning is an asexual method of reproduction, where fertilization or inter-gamete contact does not take place.

Answer:

oatmeal, eggs, fruit, smoothies

Explanation:

Answer:

The average speed is 60 miles per hour or 1 mile per minute.

Explanation:

If you multiply 30 by 2 to find the miles per hour, you also have to multiply 30 miles by 2. This results in 60 miles per hour. If you want to find the miles per minute, you divide the 30 minutes by 30. You have to do the same to the miles, so the average speed could also be 1 mile per minute.

Answer:

the correct answer is Option, C. DISEASE

Answer:

23 chromosomes

Explanation:

gametes has 23 chromosomes.