Advanced Biochemistry MCQ-19 (PG Level)

10mM acetate buffer (pH 4.00) is diluted one million times with distilled water (pH 7.00). The pH of this diluted buffer is: (CSIR_2015_I)

Consider the structure-less oligo-peptide, R-G-P-S-T.K-M-P-E-Y-G-S-T-D-Q-S-N-W-H-F-R. The number of bonds that will be cleaved b trypsin and chymotrypsin treatments separately are: (CSIR_2015_I)

Collagen is most prevalent extracellular matrix protein. Which of the following is NOT true for collagen? (CSIR_2015_I)

Cytochrome-c has only one tryptophan residue (W) which is buried. The protein in cacodylate buffer (pH 6.0) is excited at 280 nm, and its emission spectrum measured in the range of 300-450 nm. The same measurement was repeated on the protein in the buffer containing 6M guanidine hydrochloride. It was observed that there is an increase in the intensity of the emission spectrum of the guanidine hydrochloride treated cytochrome-c. The most probable reason for this increase is: (CSIR_2015_I)

The exact backbone dihedral angles in a folded protein can be obtained by: (CSIR_2015_II)

Which one of the following statements correctly applies to proteins which are translated on the rough endoplasmic reticulum? (CSIR_2015_II)

Lipid rafts are rich in both sphingolipids and cholesterol. Cholesterol plays a central role in raft formation since lipid rafts apparently do not form in its absence. Why do you think cholesterol is essential for the formation of lipid rafts? (CSIR_2015_II)

Which of the following is NOT true for cholesterol metabolism? (CSIR_2016_I)

Penicillin acts as a suicide substrate. Which one of the following steps of catalysis does a suicide inhibitor affect? (CSIR_2016_I)

The -COOH group of cellular amino acids can form which of the following bonds inside the cell? (CSIR_2016_I)