Which structure(s) of proteins remains(s) intact during denaturation process ?
A
Both secondary and tertiary structures
B
Primary structure only
C
Secondary structure only
D
Tertiary structure only
NEET 2019, Medium
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B
Primary structure only
b During denaturation $2^o$ and $3^o$ structures are destroyed but $1^o$ structure remains intact
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A tetrapeptide has $- COOH$ group on alanine. This produces glycine $(Gly)$, valine $(Val)$, phenyl alanine $(Phe)$ and alanine $(Ala)$, on complete hydrolysis. For this tetrapeptide, the number of possible sequences (primary structures) with $- NH _2$ group attached to a chiral center is: