32. Some cells possess peptides which contain D-form of amino acids. How do they arise? (1) These peptides are produced by ribosomes by incorporating D- amino acids at specific positions. […]
Tag: post translational modification pyq
No posts found.
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Prokaryotic Stress Response: PerR, RecA, Heat Shock Proteins, and Chaperonins in Oxidative, Acidic, and Thermal Stress
31.Following statements were made about stress response in prokaryotes: A. PerR functions as a major peroxide sensor in many Gram- positive bacteria. B. Extreme acidic pH induces RecA-mediated DNA damage, […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding the Role of Bacterial Stress Proteins: DnaK, DnaJ, GroEL, GroES, and GrpE in ATP-Dependent Protein Folding
In a form of stress response, bacteria synthesize a group of proteins called stress proteins (or heat shock proteins) such as DnaK,DnaJ, GroEL, GroES, and GrpE. DnaK is an ATP […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
The Role of Protein Modifications: Acetylation, Hydroxylation, and Glycosylation in Degradation, Folding, and Protein-Protein Interactions
In bacteria, N-formyl methionine is the first amino acid to be incorporated into a polypeptide chain. Accordingly, one would think that all bacterial proteins have a formyl group at theiramino […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
The Role of Protein Modifications: Acetylation, Hydroxylation, and Glycosylation in Degradation, Folding, and Protein-Protein Interactions
The following statements were made regarding the role of protein modifications A. Attachment of acetyl groups to the amino termini of proteins makes it more resistant to degradation. B. Attachment […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Prokaryotic Protein Initiation: The Role of Formyl Methionine, Deformylase, and Aminopeptidase in Translation and N-Terminal Processing
In prokaryotes, the initiator t-RNA is first charged with a methionine, followed by the addition of a formyl groupto the methionine by the enzyme Met-tRNAtransformylase. Given below are several statements […]
Education
Understanding Post-Translational Modifications in Mammalian Systems: Palmitoylation, Glycosylation, Phosphorylation, and Peptidylation
Which of the following is NOT a post-translational modification in a mammalian system? (1) palmitoylation (2) glycosylation (3) peptidylation (4) phosphorylation Introduction to Post-Translational Modifications Post-translational modifications (PTMs) are chemical […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding Co-Translational Protein Modification: Myristoylation vs. Palmitoylation, Farnesylation, and Cholesterol Addition
Which one of following modification of proteins is co translational? (1) Palmitoylation (2) Myristoylation (3) Famesylation (4) addition of cholesterol Introduction to Protein Modification Proteins undergo a variety of modifications […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Understanding mRNA Premature Termination: How Transition Mutations in UAA Stop Codon Can Reverse Immature Termination
In m-RNA immature termination occurs due to stop codon UAA. Which of the following transition mutation will lead to its reversal? (1) Change at first U (2) Change at first […]
CSIR NET Life Science Previous Year Questions and Solution on Molecular Biology
Prokaryotic Translation Termination: Mechanism of Release Factors RF1, RF2, and RF3 in Stop Codon Recognition and Polypeptide Release
During translation in prokaryotes, when ribosomes reach the termination codon, the termination codon is recognized by the class I release factors (RF1 or RF2) leading to the release of the […]
