Question

When you are exposed to sunlight for a long time, your skin, which otherwise appears normal, gets heavily tanned. What could be the reason?

Answer 1

a.The genes for melanin pigmentation remain turned on and prepare more melanin than usual to protect the skin from photo-damage when it is exposed to sunlight for long time.

b.The genes for melanin pigmentation remain turned off and synthesize more melanin than usual to protect the skin from photo-damage when it exposed to sunlight for a long time.

c.The genes for melanin pigmentation are switched off to stop the synthesis of melanin to protect the skin from photo-damage when it is exposed to sunlight for a long time.

Answer 2

first you would need to know if melanin is produced when this gene is turned on or off.

Answer 3

imma be honest i have no idea about biology.. i have to redo this class and 3 others because my old school was unaccredited. i have a 2 months to finish all this or i fell the 9th grade/: (i just started this program)

Answer 4

I think the most plausible answer is A, since a gene has to be activated in order to code for a protein product. Since melanin is a protein that is always needed for the protection against UV rays from the sun, it's likely that this gene is usually activated when the organism has been exposed to a lot of sunlight for a long time. Therefore the gene will remain active and code for more melanin protein than usual.

Answer 5

Perhaps you would find this a useful article.
http://www.sankofa.ch/texts/Melanin.htm

Answer 6

thank you!(: