Steroid hormones affects cells by binding to intracellular receptor
complex that composed of a single polypeptide chains, which promote or inhibit
transcription of specific genes. The receptors for steroid hormones are located
inside the target cells specifically in the nucleus or cytoplasm, which bind to
regions of receptive genes.
<span>Therefore, the function of steroid hormones is to control gene
expression in target cells by selectively affecting the transcription of a set
of genes. The proteins concentration of the target cells are altered, which
could result to the modification of the phenotype of cell. </span>
Which of the following are allotropes of carbon?
a) Buckminster Fullerene
b) Graphene
c) Footballene
d) Steel
The right answer is option a (Buckminster fullerene).
Fullerene is one of the crystalline allotrope of carbon, which was discovered in 1985 collectively by the scientists Richard E. Smalley, Robert F. Curl, Sean O' Brien, James Heath and Harold Kroto. The name 'buckminsterfullerene' was given to the fullerene molecule discovered as a homage to the American architect and scientist Buckminster Fuller.
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<h3>
MORE TO KNOW ABOUT FULLERENE:-</h3>
<u>Properties</u><u> </u><u>of </u><u>fullerenes</u><u>:</u>
- It is found in soot, interstellar dust and in carbon rich rocks.
- They are bad conductors of electricity.
- They are magnetic in nature.
- They are odourless.
- They can be soluble in solvents like chloroform, benzene or toluene.
<u>Uses </u><u>of </u><u>fullerenes:</u>
- They are used as lubricants.
- They are used as insulators.
- Some forms of fullerenes can conduct heat and electricity. So, they are used as superconductors and semiconductors.
- They are used in the process of drug delivery.
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Well, continental drift is the theory that our Earth’s continents slowly float on earth’s mantle. It is actually believed that the earths continents were once a huge landmass, and continental drift caused them to float apart into the landmasses they are today! Plate Tectonics are the movements and changes in the Earth’s land plates, also known mostly as.. continents.
Causes of a DNA mutations by environmental factors such as ultraviolet radiation from the sun or can occur if an error is made as DNA copies itself during cell division