Urethritis is the term for inflammation of the Urethra and the correct spelling
No it’s not. It is a problem in most of the first world and in a majority of the second world.
When the skin is exposed to ultraviolet rays, the skin produces a molecule that is turned into Vitamin D.
Sun is the source of ultraviolet rays important for Vitamin D production. Due to this reason, in the case of Vitamin D deficiency, it is recommended by doctor's to absorb sunlight by skin. The Vitamin D production occurs specifically by UV B rays rays which lie in the range of 290-315 nanometer.
The chemical 7-dehydrocholesterol absorbs these rays and convert to previtamin D3. Further, previtamin D3 isomerizes to Vitamin D. Other than sunlight, Vitamin D can be taken through diet. The sources include seafood like fish, fish oil, dairy products, beef liver etc. Vitamin D is required for bone and teeth formation, muscle contraction, immune system etc.
Learn more about Vitamin D -
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<h2>Answer </h2>
A virus consisting of a single strand of RNA, which is transcribed into complementary DNA, is a RNA replication virus.
<u>Explanation </u>
It is the RNA replication virus that is transcribed into complementary DNA. The RNA replication is a process in which the doubling of single strands taking place the RNA is transcribed into the complementary DNA. There are three stages of RNA replication which are an initiation, chain elongation, and termination. There are three types of RNA involved in protein synthesis which are mRNA, rRNA, and tRNA.
