Question

1. To which class do collagen fibers belong? ___________________________

2. What is the monomer for this class of organic molecules? _____________________

3. With what type of reaction breaks down a polymer of this class into monomers? _______________________________

4.Osteoclasts are able to produce the components of a substance that lowers the pH of the surrounding matrix and breaks down hydroxyapatite.

A. proteoglycan

B. sodium chloride

C. alkaline mucus

D. hydrochloric acid

5. list two substances that osteoblast cells should be able to produce:   ______________________________ and ____________________________.

6.Osteoclasts produce an enzyme that break down collagen fibers, what is the name?

Answer 1

Answer 1:

Collagen fibres are Proteins. They provide strength to various part of body like bones, skin, tendons, ligaments, cartilage.

Answer 2:

Amino acids are the monomers of proteins. Proteins are macromolecules containing long chain of amino acids joined together by peptide bonds.

Answer 3:

Proteins are broken down into smaller peptides and then into amino acids by a process called as proteolysis which takes place in presence of Enzymes proteases and hydrochloric acid.

Answer 4: The right choice is D

Osteoclasts secrets hydrochloric acid which lowers the pH and it also secretes enzymes which breaks down hydroxyapatite.

Answer 5: Osteoblasts produces collagen fibres and hydroxyapatite. Collagen fibres are produced along with bone proteins called as osteocalcin and osteopontin which. These forms matrix of bone along with Hydroxyapatite which is bone mineral.

Answer 6: Osteoclasts produces an enzyme called as collagenase which breaks down collagen fibres.