Proteins found in human have amino acids with configuration. D L meso A & B none

Question

Proteins found in human have amino acids with configuration. D L meso A & B none of these Which of the following is a correct structure for L- valine I II III IV V Which of the following is a predominant form of serine at Physiological PH? I II III IV V Disulfide bridges are formed by: oxidation of thiol groups joining cysteine residues within a peptide joining cysteine residues between two strands of a peptide all of these The secondary structure of a protein is due to between amino acid hydrophobic interactions hydrogen bonding salt bridges disulfide linkage none of these Which of the following is a secondary structure of keratin found in hair? beta-pleated sheets alpha-pleated sheets alpha-helix beta-helix

Explanation / Answer

Q20

proteins have all amino acids with... "L" since body prefers "L" cnofiguration in the proteins...

Q21

Find L-valine

ignore V since it is not even valine

H3 must go to the right...

so...

ignore I and III due to NH being in the other side

between II and IV

correct methyl count is that of II

so choose II

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