6 Which of the following bonds is not created by a condensat

6. Which of the following bonds is not created by a condensation/dehydration reaction? a) peptide bond ( between amino acids) b) phosphodiesterase bond ( between nucleotides) c) glycosidic bond (between sugars) d) ester linkage (connects glycerol to fatty acid) e) they are all created by dehydration reactions

7. Tertiary structure of a polypeptide is stabilized by all of the following except:

a) ionic bonds

b) hydrogen bonds

c) disulfide bonds

d) covalent bonds

e) there are no exceptions

Solution

Answers :

Question number 6 : The correct answer E (they are all created by dehydration reactions). All these reactions are the examples of dehydration reactions in which the loss of water molecules occurs.

Question number 7 : The correct answer is E (there are no exceptions) are are important for the stabilisation of tertiary structure of a protein.

Explanation : Tertiary structure defines the three dimensional structure/folding of a polypeptide. In this structure non specific hydrophobic interarctions drives the alpha-helixes and beta pleated-sheets into a compact globular structure. Example: Myoglobin.