Biology MCQ (Multiple Choice Questions in Life Science)
(Sample/Model/Practice Questions for JRF/NET Life Science Examination, ICMR JRF, DBT JRF, GATE, ICAR NET, PG Entrance)
MCQ Biochemistry: Amino Acids Part 4 (MCQ 008)
1). Which group of a fully protonated glycine (NH3+ – CH2 – COOH) first release a ‘proton’ when it is titrated against – OH- ions?
a. Carboxyl group
b. Amino group
c. Both at the same time
d. It cannot be predicted
2). pKa is the measure of a group to __________ proton.
a. Take up
3). Which of the following amino acid bears a guanidine group in the side chain?
4). The precursor of glycine synthesis in microbes and plants is_______.
d. None of these
5). Single letter code of selenocysteine is _____.