Why is uva light considered a mutagen?

it penetrates the skin and can cause mutations.

it can be prevented by wearing a protective vest.

it produces chemicals that can be inhaled.

it is found in synthetic dyes and cosmetics.

An agent able to cause DNA mutations is called mutagen. UV light is the most common source of radiation that affects DNA, but it is a weak radiation and it penetrates only the surface cells of your skin. However, UVA radiation is considered as a mutagen because it penetrates deep into the skin and can cause mutations. 

step 1: replication fork formation.

step 2: primer binding.

step 3: elongation.

step 4: termination.

explanation:

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blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.