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)
Biochemistry: Amino Acids Part 3 (MCQ 007)
(1). pH below pI amino acids will be___. (ICMR JRF Exam, 2006)
c. Net charge zero
d. No charge
(2). Naturally occurring proteins are usually polymers of _____.
a. D-amino acids
b. L-amino acids
c. A mixture of D and L amino acids
d. Either D amino acids or L- amino acids
(3). At zwitterionic form, an amino acid will act as_____.
a. Proton donor
b. Proton acceptor
c. Proton donor and acceptor
d. None of these
(4). Which of the following amino acid is more likely to occupy the interior of a globular protein?
e. All of these
(5). Proteins absorb UV light at 280 nm and show a characteristic peak at this wavelength. Which amino acid residue in the protein is responsible for this absorption?