Building blocks of proteins are the beta-amino acids

[HAYDA]

Which of the following are true ?



(a) Proteins range from a MW from about 3,000 to 1.0e6 g/mol

(b) Fibrous proteins are the main component of Muscle,hair and cartilage

(c) Building blocks of proteins are the beta-amino acids

(d) Polar amino acid side chains are hydrophobic

(e) -COHN- is a peptide linkage

(f) The order of amino acids in a protein chain is the primary structure

(g) The beta sheet is a secondary structure of a protein

(h) The overall shape of a protein, eg globular, is its tertiary structure

I know for sure that e f h are true and most likely c and b but I am not sure. which ones are true?

 

[iansmith]

The statement that is wrong is based on a (bio)chemical property.

If you look at this page you should see a pattern between amino acid and their propertities.
http://folding.stanford.edu/education/AminAcid.html

 

[ravenprp]

All of the options listed are true except for (d) and (g).

(d) Polar amino acid side chains are actually hydrophilic, meaning they are attracted to water. Nonpolar amino acid side chains are hydrophobic and repel water.

(g) The beta sheet is a secondary structure of a protein, but so is the alpha helix. Both are common secondary structures in proteins.