No. Carotene is a pigment. Beta-carotene is a form of Vitamin A. Keratin is a protein which makes up hair and fingernails. http://en.wikipedia.org/wiki/Keratin
No, but carotene can.
It is called Keratinocyte, which is in the outermost layer of the epidermis.
Melanin and carotene are skin pigments that help block damaging rays from the sun. The more of these pigments in the skin the greater the protection.
Foods that contain Keratin protein are poultry, fruits and vegetables such as Brussel sprouts and citrus fruits, kidney and liver. Keratin helps to make up a person's hair, skin and fingernails.
Fingernails are made from a protein called "Keratin".
Keratin (the same as what your fingernails are made of).
Rhinos do not have tusks, but their horns are made from compacted hair and keratin (the same material as fingernails).
The same substance as our fingernails - keratin.
Your hair is made up of a long string of the protein keratin, which is the same protein that is the building blocks for fingernails, feathers, and even claws in many other species. --------------- Our skin is made up of keratin as well.
What hair and nails have in common is that they grow. A hair and nails what they have in command is that they are the same as dogs.
Rhinoceros hair is made of the same material as human hair is, keratin. Keratin also makes up the rhino's horn.