BIOMOLECULES AND ENZYMES

BIOLOGY

AMINO ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Select 3 polar, uncharged R groups.
A
Glutamine
B
Lysine
C
Asparagine
D
Threonine
E
Tyrosine
Explanation: 

Detailed explanation-1: -There are five amino acids that are polar but uncharged. These include serine, threonine, asparagine, glutamine and cysteine.

Detailed explanation-2: -Threonine’s R-group is a 2 carbon chain with a hydroxyl attached to the first carbon. Because of its hydroxyl group, threonine can be phosphorylated. Threonine is also a polar, hydrophilic amino acid, with a neutral charge at physiological pH.

Detailed explanation-3: -Ans. Threonine, Serine, asparagine, and glutamine are polar although neutral (uncharged) amino acids. Such side chains can outline several hydrogen bonds.

Detailed explanation-4: -The polar group consist of 10 amino acids, two are negatively charged-aspartic acid and glutamic acid, 3 have a positive charge-arginine, lysine and histidine, and 5 are uncharged-asparagine, glutamine, serine, threonine and tyrosine.

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