Answer:
The RNA carries out these instructions; it copies and transfers the genetic code from the DNA to ensure the relevant proteins are made. So just think of it as “DNA makes RNA make proteins”. Whereas DNA stands for deoxyribonucleic acid, RNA stands for ribonucleic acid.
Explanation:
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The correct answer is true.
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Water-soluble and lipid-soluble hormones that bind to target cells are secreted by endocrine glands.
The interaction between endocrine glands, target cells, water-soluble hormones, and lipid-soluble hormones is accurately described by the aforementioned sentence.
<h3>What functions and how does the endocrine system operate?</h3>
The level of hormones in your blood is regularly monitored by your endocrine system. In order to transmit the message, hormones send their messages by locking into the cells they intend to reach.
When your hormone levels increase, the pituitary gland signals other glands to stop manufacturing and releasing hormones. The pituitary gland has the ability to tell other glands to manufacture and release additional hormone when levels fall below a certain threshold.
Homeostasis is a process that functions similarly to your home's thermostat. Almost every physiological process is impacted by hormones, including:
- Metabolism
- Growth & development.
- Fertility & sexual function.
- Sleep.
- Blood pressure.
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Answer:
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Explanation:
A transcriptional activator is a protein (transcription factor) that increases transcription of a gene or set of genes. Activators are considered to have positive control over gene expression, as they function to promote gene transcription and, in some cases, are required for the transcription of genes to occur. Most activators are DNA-binding proteins that bind to enhancers or promoter-proximal elements.The DNA site bound by the activator is referred to as an "activator-binding site". The part of the activator that makes protein–protein interactions with the general transcription machinery is referred to as an "activating region" or "activation domain".
Most activators function by binding sequence-specifically to a regulatory DNA site located near a promoter and making protein–protein interactions with the general transcription machinery (RNA polymerase and general transcription factors), thereby facilitating the binding of the general transcription machinery to the promoter.Other activators help promote gene transcription by triggering RNA polymerase to release from the promoter and proceed along the DNA. At times, RNA polymerase can pause shortly after leaving the promoter; activators also function to allow these “stalled” RNA polymerases to continue transcription.
The activity of activators can be regulated. Some activators have an allosteric site and can only function when a certain molecule binds to this site, essentially turning the activator on Post-translational modifications to activators can also regulate activity, increasing or decreasing activity depending on the type of modification and activator being modified.
In some cells, usually eukaryotes, multiple activators can bind to the binding-site; these activators tend to bind cooperatively and interact synergistically.
The main factor that determines the stages a star will follow after the main sequence is the star's mass or size.
<h2>What is star?</h2>
An astronomical object referred to as a star is made up of a bright plasma spheroid that is held together by gravity.
- The Sun is that the star that is closest to Earth. Other stars also are visible at night with the unaided eye, but because to their great distances from Earth, they seem as stationary points of light.
- Many of the brightest stars have names, and therefore the most notable stars have been grouped into constellations and asterisms.
- Star catalogues are put out by astronomers that list the known stars and offer standardized stellar labels.
<h3 /><h3>What function does a star serve?</h3>
- Furthermore, stars are crucial because they create life on Earth.
- The Sun is that the most significant since life on Earth wouldn't exist without it.
- Earth would merely be a rock covered in ice.
- As an illustration, ancient mariners relied on the celebs to assist them navigate at sea.
<h3>What causes a main sequence star to form?</h3>
But if the body has sufficient mass, the collapsing gas and mud burns hotter, eventually reaching temperatures sufficient to fuse hydrogen into helium. The star activates and becomes a main sequence star, powered by hydrogen fusion.
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