3. How are the long DNA molecules found in eukaryotes packed into short chromosomes?
Explanation:
DNA is tightly wound around histones,forming nucleosomes. Nucleosomes are tightly coiled and supercoiled to form chromosomes.
how soon can a blood test detect pregnancy after conception
Answer:
5 weeks
Explanation:
I think so.
Pls mark as brainliest answer if it helps you
now you’ll examine an operon that undergoes negative and positive control. the ara operon in e. coli codes for enzymes that metabolize the sugar arabinose, which e. coli can use for energy. as you can see in the diagram, the regulatory protein arac can act as both an activator and a repressor of the ara operon.
The lac operon is known to be able to undergoes negative and positive control.
The diagram based on the 4 table arrangement is filled up below (Right to left);
In the presence of arabinose: initiator, activator, yes, yes.In the absence of arabinose: initiator and operator, repressor, no, no.
If a mutation prevents arabinose from biding to AraC: initiator and operator, repressor, no, no.
If arabinose is present but a mutation and AraD enzyme renders it non-functional: initiator, activator, yes, no.
The metabolism of the sugar arabinose is known to be influenced by an operon that is said to undergo both positive control and negative control.
Transcription of the ara operon is lead by the regulatory protein AraC, which then bound to the DNA.
When arabinose is present, it binds to AraC, and both parts of the AraC dimer are then also bound to the initiator, making transcription to move foreword.
When arabinose is absent, one part of the AraC dimer is often bounded to the initiator, while the other part is bounded to the operator, thereby hindering transcription.
See full question below
Now you'll examine an operon that undergoes negative and positive control. The ara operon in E. coli codes for enzymes that metabolize the sugar arabinose, which E. coli can use for energy. As you can see in the diagram, the regulatory protein AraC can act as both an activator and a repressor of the ara operon.
Use the diagram above to fill in the table.
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the movement of water into the atmosphere from plants is
Answer:
Transpiration
Explanation:
Process through which plants lose water into the atmosphere
Answer:
Transpiration
Explanation:
The process by which water moves into the atmosphere from plants is transpiration
QUESTION 7
All of the following cells might be a product of meiosis EXCEPT?
OA) an egg
O B) a liver cell
OC) a spore
OD) a sperm cell
E) a gamete
Answer:
B) Liver Cell
Explanation:
An egg and a sperm cell are reproductive cells that are products of meiosis
A spore is produced by meiosis in the sporophyte
A gamete is produced through meiosis
A fatal central nervous system disorder caused by more than 35 repetitions of a particular set of three base pairs is:
Answer:
Huntington's Disease
Explanation:
A piano player uses her hands for brief quick movements. Which muscle fiber type would you therefore predict to be predominant in these muscles
For brief quick movements, which muscle fiber type would you therefore predict to be predominant in these muscles...Fast twitch muscle fiber type.
There are three types of muscle tissue. 1. Cardiac 2. Smooth 3. skeletal muscles. The skeletal muscle are involved in voluntary movements of the body.
Since the player uses her hand in a voluntary way of movement, therefore she makes use of her skeletal muscles.
With regards to the skeletal muscles, there are two types with regards to speed, we have the slow twitch and the fast-twitch.
The fast-twitch muscle fiber aids in fast movement of the body but for shorter periods compared to the slow twitch.
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What type or piece of material culture do you think gives the most information about your society? Why?
How is genomics related to genes and DNA?
Answer:
A gene consists of enough DNA to code for one protein, and a genome is simply the sum total of an organism's DNA.
Genomic DNA, or gDNA, is the chromosomal DNA of an organism, representing the bulk of its genetic material. ... In research, genomic DNA is useful tools in applications such as PCR, library construction, Southern blotting, hybridizations, SNP analysis, and molecular diagnostic assays.
Answer:
DNA
DNA is the molecule that is the hereditary material in all living cells.
Genes are made of DNA, and so is the genome itself. A gene consists of enough DNA to code for one protein, and a genome is simply the sum total of an organism's DNA.
DNA is long and skinny, capable of contorting like a circus performer when it winds into chromosomes. It's skinny as a whip and smart as one too, containing all the information necessary to build a living organism. In a very real sense, DNA is information.
WHAT IS DNA MADE OF?
DNA is a very large molecule, made up of smaller units called nucleotides that are strung together in a row, making a DNA molecule thousands of times longer than it is wide.
Each nucleotide has three parts: a sugar molecule, a phosphate molecule, and a structure called a nitrogenous base. The nitrogenous base is the part of the nucleotide that carries genetic information, so the words "nucleotide" and "base" are often used interchangeably. The bases found in DNA come in four varieties: adenine, cytosine, guanine, and thymine—often abbreviated as A, C, G, and T, the letters of the genetic alphabet.
How did people find out that DNA is the hereditary material?
DNA was largely ignored for decades after a German chemist, Friedrich Miescher, first isolated the white, slightly acidic substance from the nucleus of cells in 1869. No one knew what DNA's function was—in fact, some doubted that it had a function at all—so they pretty much left the stuff alone.
Very few people thought that DNA could be the hereditary material. Early studies of DNA suggested, erroneously, that the molecule was made up of the same sequence of four bases repeated over and over—ACGTACGTACGT… for example. No one could imagine how such a monotonously simple molecule could contain the information necessary to build a living organism.
But during the 1930s and 1940s, new experiments began to suggest that DNA might, in fact, be important. It turned out that different strains of bacteria can exchange DNA and that when they do certain traits, such as the ability to cause disease in humans, can be passed from one strain of bacteria to another. Scientists also learned that when a virus infects a cell it injects its DNA into the cell, which then produces many copies of the virus, suggesting that DNA contains instructions for building viruses. And they found that different species of organisms have different proportions of bases in their DNA—one species might have DNA that is 30 percent A, 20 percent C, 20 percent G, and 30 percent T, while another might have 20 percent A, 30 percent C, 30 percent G, and 20 percent T. People began to think that genetic information might be written in the differences between the DNA bases of different species.
What does DNA look like?
A DNA molecule is a double helix, a structure that looks much like a ladder twisted into a spiral. The sides of the ladder are made of alternating sugar and phosphate molecules, the sugar of one nucleotide linked to the phosphate of the next. DNA is often said to have a sugar and phosphate "backbone."
Each rung of the ladder is made of two nitrogenous bases linked together in the middle. The length of a DNA molecule is often measured in "base pairs," or bp—that is, the number of rungs in the ladder. Sometimes, this unit of measurement is shortened simply to "bases."The structure of DNA was worked out in 1953 by James D. Watson and Francis Crick, who worked together in the Cavendish laboratory in Cambridge, England. By the time they began their work in the early 1950s, it was clear that DNA is the hereditary material, and scientists were racing to find out more about the long-ignored molecule, picking apart the implications of each new detail. Everyone knew they couldn't really understand how DNA works until they understood how its nucleotide building blocks are put together.
(Im a Really fast Typer and Thinker)
write a paragraph about Balochistan
Explanation:
Balochistan is located at the eastern edge of the lranian plateau and in the difficult to define border region between southwest, central and south Asia.
An example of an organism that demonstrates asymmetry is a??
Answer:
Some of the animals exhibiting asymmetry are flounders and hermit crabs. Adult flounders have both eyes on one side. Hermit crabs have a large claw on one side. In flowering plants, the thanksgiving cactus (Schlumbergera truncata) has irregular, asymmetrical flowers.
Explanation:
Answer:
hermit crabs
Explanation:
The definition of asymmetry means that two parts of something are not exactly the same. A fiddler crab has one claw that is bigger than the other so that is an example that a fiddler crab's body has asymmetry.
If the birth rate and death rate are balanced in a population, how might a population increase in size?
a. By doubling
b. By emigration
c. By immigration
d. By an increase in density
these tiny blood vessels transport absorbed nutrients.
Answer:
we called them capilary
Answer:
Capillaries
Explanation:
Capillaries are tiny blood vessels which transport absorbed nutrients, blood, and oxygen to all cells in the human body. They also connect arteries and veins together.
In ________ the gametophyte is more obvious than the sporophyte. A. grasses B. mosses C. conifers D. ferns
Answer:
Mosses is the correct answer
importance of blood circulation
Answer:
Proper circulation is key for maintaining optimal health. It ensures that blood and oxygen continuously flow throughout the body, allowing every organ to function properly. It helps to heal wounds faster, it keeps your brain sharp, it keeps your heart healthy, and it even gives your complexion a natural flush.
Explanation:
would you mind to brainliest my answer?
what insects don't have piercing and sucking mouth parts?
.
Answer:
lice
Explanation:
they bite and chew on their host skin
gene expression is determined by several factors, including
Hi! Thanks for asking your question here on Brainly!
Answer:
Chemicals in the body of a living organism is one of the many factors determined in gene expression.
Explanation:
The presence of drugs and/or chemicals in a living organism's environment, this can also influence gene expression in the organism.
Hope this helps :D Happy Holidays!
Expressivity can be impacted by a number of elements, such as genetic make-up, exposure to dangerous chemical substances, other environmental effects, and age.
What are the factors that affect gene expression?The level of transcription is where the majority of control over gene expression is exerted, and this is mostly due to the fact that proteins bind to certain locations on DNA.
It is possible for environmental elements such as nutrition, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens to have an effect on which of an animal's genes are expressed, which in turn has an effect on the animal's phenotype.
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how much blood is filtered by the kidneys each day?
Answer:
Many times a day, your blood circulates through your kidneys.
Explanation:
Approximately 170 liters per day and 7 liters per hour. About 150 quarts of blood are filtered by your kidneys in a single day relavent to 44 gallons. The tubules are responsible for returning water and other substances to your blood following their filtering through your glomeruli. Approximately one or two quarts of the water becomes urine.
How do human beings affect the carbon dioxide and oxygen cycle?
Answer:
Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. The ocean absorbs much of the carbon dioxide that is released from burning fossil fuels.
Answer:
By breathing.
Explanation:
Humans inhale oxygen, and when they need to release it, (exhale) that oxygen is no longer oxygen and is now carbon dioxide. Trees and plants are what helps oxygen to exist in our world even though we breathe it in and convert it to carbon dioxide. Hope this helps ^^
in translation, the dehydration synthesis reaction is catalyzed by which enzyme?
Answer:
hydrolysis
Explanation:
hydrolysis is the reverse of dehydration because it breaks a covenant bond by adding a water molecule
hope this was helpful ☆☆
In translation, the dehydration synthesis reaction is catalyzed by DNA polymerase enzyme. Therefore, the correct option is B.
What is DNA polymerase?DNA polymerases are a group of enzymes that are responsible for catalyzing the synthesis of DNA. Their main function is to replicate the DNA. These enzymes work in pairs and a responsible for replicating two strands of DNA in a tandem. DNA polymerases α and δ are primarily responsible for nuclear DNA replication. There are at least 15 DNA polymerases known to exist in humans.
Translation is the process by which the genetic code carried by mRNA is decoded to produce a specific sequence of amino acids that will form a protein. This process involves the ribosome, which is responsible for assembling the protein chain by joining amino acids in a specific order dictated by the mRNA sequence. Therefore, the correct option is B.
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The question is incomplete, but most probably the complete question is,
In translation, the dehydration synthesis reaction is catalyzed by which enzyme?
A. Ribosome
B. DNA polymerase
C. Peptide
D. RNA polymerase
E. Ligase
F. Topoisomerase
What is needed by all living things to carry out all of life's processes?
Answer:
Living organisms need energy to carry out all of life's processes.
What is a chemical reaction from your teeth
Explanation: Calcium phosphate and hydrogen ions undergo a reversible reaction with calcium ions, phosphoric acid and water. The products of the reaction are calcium ions, phosphoric acid and water. All of these exist in chemical equilibrium with the crystalline calcium phosphate.
Answer:
calcium ions, phosphoric acid and water
Explanation:
Calcium phosphate and hydrogen ions undergo a reversible reaction with calcium ions, phosphoric acid and water
A soccer player is running at a rate of 6m/s. He then stumbles over an opponent's foot falling & rolling to a stop. This took 4 seconds. What was his acceleration?
Answer:
His acceleration was -1/5 m/s²
Explanation:
why is Ten dollars and Ice not a kinetic energy ?
Answer: They aren't kinetic energy
Explanation: They are not because it is either motionless or at rest.
Explain why bacteria and archaea are prokaryotic cells and all other organisms are eukaryotic cells
Answer:
Archaea and bacterial cells lack organelles or other internal membrane-bound structures. Therefore, unlike eukaryotes, archaea and bacteria do not have a nucleus separating their genetic material from the rest of the cell.
Explanation:
two impacts of climate change on agriculture.
Answer:
OKAY FIRST IMPACT:
Crops either get to much sunlight during droughts or to much water during floods
SECOND IMPACT:
Crops may not have the right amount of nutrients or vitamins because of heat produced by the sun every day
BRAINLIST ???
what part of the autonomic nervous system is represented in the given image?
NEED URGENT HELP!
A. What are three things that can create microclimates?
B. What characteristics of these things help create a microclimate?
Topography (height), large bodies of water and urban areas can create microclimates
in a hot place, if theres a mountain there, the top of the mountain can be cold
cement in an urban area can absorb a lot of heat during the day and then release it at night
valleys can have cold air
how do you collect maple leaves in animal crossing
Answer:
Explanation:
Similarly to how Cherry Blossom Petals work during the Spring, you can get Maple Leaves by searching for a large orange leaf falling from the sky on your island during this limited period in the Autumn. It's random when and where these leaves will fall on your island, so always be on the look out for one to appear!
how is the scientific method used in earth science (it was due yesterday)
Answer: The steps used in scientific methods are to ask a question, form a hypothesis, test the hypothesis, analyze the results, draw conclusions, and communicate results. A controlled experiment tests only one factor at a time so that scientists can determine the effects of changes to just that one factor.
Answer:
The scientific method is the gold standard for exploring our natural world. You might have learned about it in school, but here’s a quick reminder: It’s the process that scientists use to understand everything from animal behavior to the forces that shape our planet—including climate change.