Q. Which one of the following techniques is used to monitor RNA transcripts, both temporally and spatially? (A) Northern blotting (B) In situ hybridization (C) Southern blotting  (D) Western blotting Ans: In situ hybridization

Q. Standard error is (A) the probability of a type I error in a statistical test (B) the error in estimating a sample standard deviation (C) the standard deviation of a variable that follows standard normal distribution (D) the standard deviation of distribution of sample means Ans: ...

Q. Which one of the following statements is true for actin? (A) Actin filament is structurally polarized and the two ends are not identical (B) De novo actin polymerization is a single-step process (C) The pointed end of the actin filaments is the fast growing end (D) Actin forms ...

Q. Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the molecule X by expressing protein Y. Which one of the following modes of signaling represents the interaction between A and B? (A) Autocrine                          (B) Juxtacrine ...

Q. Which one of the following bioreactor configurations is the basis for a trickling biological filter?  (A) Stirred tank                        (B) Packed bed (C) Air lift                                (D) Fluidized bed Ans: Packed bed

Q. Which of the following technique(s) can be used to  study conformational changes in myoglobin? P. Mass spectrometry Q. Fluorescence spectroscopy R. Circular dichroism spectroscopy S. Light microscopy (A) P only           (B) P and S only              (C) Q and R ...

Q. Which one of the following is NOT a principal component of innate immunity? (A) Mucosal epithelia (B) Dendritic cells (C) Complement system (D) Memory B-cells Ans: Memory B-cells

Q. Which one of the following metabolic processes in mammalian cells does NOT occur in the mitochondria? (A) Citric acid cycle                          (B) Oxidative phosphorylation (C) Fatty acid β-oxidation                (D) Glycolysis Ans: Glycolysis

Q. Which one of the following is INCORRECT about protein structures? (A) A protein fold is stabilized by favorable non-covalent interactions (B) All parts of a fold can be classified as helices, strands or turns (C) Two non-covalent atoms cannot be closer than the sum of their van der ...

Q. A mixture contains three similarly sized peptides P, Q and R. The peptide P is positively charged, Q is weakly negative and R is strongly negative. If this mixture is passed through an ion-exchange chromatography column containing an anionic resin, their order of elution will be (A) P, Q, ...

Q. Which one of the following BLAST search programs is used to identify homologs of a genomic DNA query in a protein sequence database?             (A) blastp            (B) ...

Q. Which of the following components constitute a molecular mechanics force field? P. Bond stretching Q. Bond angle bending R. Torsional bond rotation S. Non-bonded interactions (A) P and Q only (B) P, Q and R only (C) P, Q and S only (D) P, Q, R and S Ans: P, Q, R and S