keratin
Keratin is tough and resistant. This topic is part of Biology within Science & Nature. This page currently draws on 12 supporting questions, with answers and bonus facts available below.
keratin trivia questions
Keratin is a structural protein found in hair and what?
Answer: Nails
Bonus fact: Keratin is tough and resistant.
Animal horns, claws, and feathers contain large amounts of what protein?
Answer: Keratin
Bonus fact: Different keratins form many protective structures.
Keratin proteins are especially rich in which amino acid that can form disulfide bonds?
Answer: Cysteine
Bonus fact: Disulfide bonds strengthen hard keratin structures.
The casque is made mainly of a keratin covering over what?
Answer: Spongy bony core
Bonus fact: Its internal structure is lighter than solid bone.
What protein makes up most of a bird feather?
Answer: Keratin
Bonus fact: Feathers are composed mainly of beta-keratin.
What protein helps make the outer epidermis tough and water resistant?
Answer: Keratin
Bonus fact: Keratin is abundant in the outer skin.
What protein forms much of reptile scales?
Answer: Keratin
Bonus fact: Keratin reduces water loss.
What covers the bony plates of an armadillo's armor?
Answer: Keratinized scales
Bonus fact: The shell combines bone with a keratin covering.
What feature at the tail gives rattlesnakes their name?
Answer: Rattle
Bonus fact: Interlocking keratin segments vibrate to make the warning sound.
A pangolin is a mammal covered in what?
Answer: Scales
Bonus fact: Pangolin scales are made of keratin.
What is the outermost major layer of skin?
Answer: Epidermis
Bonus fact: The epidermis contains keratin-producing cells.
What feature gives the timber rattlesnake its common warning sound?
Answer: A segmented rattle at the end of its tail
Bonus fact: Each rattle segment is made of keratin and the segments knock together when the tail vibrates.