Answer:
Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. ... Nucleosomes fold up to form a 30-nanometer chromatin fiber, which forms loops averaging 300 nanometers in length.
Explanation:
Histones help to package chromosomal DNA inside microscopic nuclei. These are positively charged proteins that bind to negatively charged DNA to form complexes known as nucleosomes.
What are nucleosomes?A nucleosome is made up of about 150 base pairs of DNA rolled up around a core of histone proteins.
The nucleosomes recurrently fold in on themselves to tighten and condense the packaged DNA when forming a chromosome.
Histones help to package chromosomal DNA inside microscopic nuclei. These are positively charged proteins that bind to negatively charged DNA to form complexes known as nucleosomes.
Thus, in this way, DNA gets stored.
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Imprinting disorders do not involve changes in DNA sequence, but only the methylated state of the DNA. Does it seem likely that imprinting disorders could be treated by controlling the maternal environment in some way, perhaps by dietary changes?
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.
another term for consumer
A. Autotroph
B. Stroma
C. Heterotroph
D.chemical energy
Look at the map below. The mountains in the Pinnacles National Monument and the mountains at Tejon Pass were once located next to each other and
a part of the same mountain range Now however, they are separated by over 240 kilometers Explain how the mountains at Pinnacles National Monument
and the mountains at Tejon Pass became separated from each other koi
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.
Divergent limits: two plates get separated.Convergent limits: These movements occur when two plates collide.Transforming limits refer to geological structures related to the seafloor expansion and associated in general with the oceanic ridge, although they might also occur in the continental plate. These limits are known as geological faults, where no rocky material is either destroyed or formed. When the plates move and produce a displacement of one transforming limits from side to side, earthquakes occur. The movement breaks the crust and originates pronounced fractures. The San Andrés fault is an example of these plate ridges.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.
what are the two components of an ecosystem
Answer:
The Ecosystem is comprised of two basic components: - Biotic and Abiotic components.
give two lysosome function
Answer:
They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.
Explanation:
Hope this help :)
Through what process does bacteria acquire the energy they need to survive ?
Answer:
Photosynthesis
Explanation:
Bacteria can obtain energy and nutrients by performing photosynthesis, decomposing dead organisms and wastes, or breaking down chemical compounds.
What do you think happens when there is
not enough food available for all of the
animals living in an ecosystem? Write your
answer below.
Answer:
Competitiveness between species will increase
Explanation:
When there is less resources available to a species that means no every animal can survive so the species will have to compete for survival
Hope this helps :)
Which Two process is it Giving brainliest Please explain
Answer:
B and C
Explanation:
Freezing: because matter is slowing down
Condensing is just like Freezing
Sorry if wrong trying my best
What is the structure of prokaryotic chromosomes
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
Visible Body Biology
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.
Related Articles
Explanation:
Prokaryotic chromosomes are found in the nucleoid of prokaryotic cells, and they are circular in shape.
Enter the answer in the space provided.
The chart lists a few structural characteristics of viruses.
1. Viruses are extraordinarily small in size.
2. Viruses are not specific to their hosts.
3. Viruses contain either DNA or RNA as genetic material.
4. Viruses lack cellular organization.
Based on the information, enter the number of the characteristic that explains why viruses are unable to reproduce on their own.
“The virus cannot reproduce itself outside the host because it lacks the complicated machinery that a [host] cell possesses.” The host's cellular machinery allows viruses to produce RNA from their DNA (a process calledtranscription) and to build proteins based on the instructions encoded in their RNA.
The blood carries _________________ to the cells from the lungs, and then picks up the _____________________ waste to carry back to the lungs to be released out of the body.
Question 10 options:
glucose, oxygen
oxygen, glucose
oxygen, carbon dioxide
carbon dioxide, oxygen
what type of food would be best for learning in school
Answer:
oatmeal, eggs, fruit, smoothies
Explanation:
What is the growth rate for a population of 1000 penguins if 500 are born and 200 die each year?
0.2
0.3
0.7
1.0
Dont answer this one
Answer:
im going to answer it just bc you told me not to :)
in a plant what is formed by a group of xylem vessels
A an oragan
B tissue
C organ system
Answer:
it might be tissue
its tissssssssue
:(( I need more help! ASAP please
Which specialized structure do nocturnal primates use to see better at night?
a tapetum lucidum
a grooming claw
a fused jaw
a tooth comb
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
Does anyone know what numbers are inside of ALL PHONES? Hint only 2. WILL GIVE BRAINLEST!
the answer is 0 and 1 like a computer
someone please help me ! i’ll mean a lot 90 points given
Answer:
Explanation:
Option D: Increasing the mass by sitting people inside
Hope this helps, mark me brainiest
Most cells in our body have two sets of chromosomes, or are Answer . Our gametes are the exception; they are:___________
Answer:
23 chromosomes
Explanation:
gametes has 23 chromosomes.
What is water called when it has a high concentration of iron, magnesium, or
calcium?
hard
a lake
groundwater
soft
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.
In the diagram below, which letter would you use to label the continental rise? *
At what point during mitosis has the nuclear membrane reformed?
Guys I need help pls
Am begging you help me
DONT JUST TYPE HEHEHDHEHEHEHEBEHE
THANK YOU
Answer:
separates the interior of all the cells
Argue whether or not pandas are at the top of their food chain in the following scenario.
Pandas are herbivores that live in the mountainous regions of China. They are peaceful and docile and spend about 18 hours a day eating bamboo. They have only one natural predator: the leopard. However, adult pandas are so large that they are never hunted. Leopards will eat only baby pandas that are left alone, and this occurrence is very rare. Most baby pandas are killed accidentally when their mothers roll over.
In this ecosystem the Leopard usually eats the Giant Panda bear cubs because the adult pandas are very intimidating out in the wild because of their size. The Leopard is then eaten by the Bengal Tiger which in this situation is the Tertiary Consumer and is at the top of the Panda Bears food chain.
The Panda comes under the secondary consumer, as it uses photosynthesis to produce its food – Bamboo. Cubs become a prey to other animals such as Leopards and tigers, which are known as the primary consumer. However adults intimidate other predators because of their great size.
When rocks are broken down by heat and pressure, chemical weathering has taken place.
Please select the best answer from the choices provided.
T (True)
F (False)
Answer:
T (True)
Explanation:
if any animal of euphotic zone has to survive in abyssal zone, what adaptations are required to survive there
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
What is true about the offspring of yeast?
They have genes that are identical to those of the parent.
They have half of the genetic information of the parent.
They have genes that are different from those of the parent.
They have organelles that are not found in the parent.
please hurry :)
Answer:
B
Explanation:
Answer:
b
Explanation:
explain how humans are solar powered (this is a 9th grade question)
Answer:
well the sun has vitamin D, and we need vitamin D to live. So going out and getting sun is necessary to live, so we are solar powered.
Explanation:
Which type of anatomy names the body parts, the location of body parts and the
relationship of two or more body parts?
a. Gross
b. Physical
c. Microscopic
d. Morphology
Answer:
b
Explanation:
Hope this helps
identify and explain if cloning is a form of asexual reproduction or sexual reproduction
[Written response] [45 POINTS!!!] Please help
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.