Question

1.Under anaerobic conditions pyruvate is converted to acetly CoA True or false?
2.Expect for glycine, all of the amino acids in a protein have the D configuration. True or false?
3.The side chain of the amino acid lysine is -CH2-CH2-CH2-CH2-NH2. TO which category does this amino acid belong?
4. which statment below describes the primary structure of a protien?
- peptide bonds join amino acids in a polypeptide chain?
- two polypeptide chains are held together by hydrogen bonds and other forces?
-side chains interact to form disulfide bonds

Answer 1

1. The statement is false.under anaerobic conditions pyruvate is converted to lactic acid or ethanol which depends on the organism. When Pyruvate is converted into the acetyl CoA , decarboxylation occurs and carbon dioxide is removed. It is the link between glycolysis and citric acid cycle. I happens in aerobic condition.

2.The statement is false. Glycine is optically inactive. And except glycine all other amino acids in a protein have the L configuration.

3.We can see that the side chain of the lysine contains the hydrocarbon chain. We know that the hydrocarbon is non-polar, Hydrophobic in nature. So the amino acid,lysine belongs to the hydrophobic amino acid category.

4.Peptide bonds join amino acid in a polypeptide chain- describes the primary structure of a protein.