46. A DNA with the sequence 5′CGCATCGATCATGCCCTGA…..AGTCCCATTAGATGCC3′ needs to be PCR amplified. The reverse primer will have the following sequence: 1. 5′GGCATCTA3′ 2. 5′TAGATGCC3′ 3. 5′GGACTCTA3′ 4. 5′CGCATCGA3′ Identifying the […]
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DBT BET JRF 2022 Previous Year Questions and Video solution
Resolution Limits of Conventional Light Microscopy: What Can We Really See?
119. A conventional light microscope allows us to magnify cells up to 1000 times and to resolve details as small as ________. A. 200 μm B. 200 nm C. 0.2 […]
DBT BET JRF 2018 Previous Year Questions and Video solution
The Role of Amino Acids in Enzyme Catalysis: Acid-Base Behavior in Reactions
44. The amino acid that can act both as an acid and a base in an enzyme catalysed reaction is: 1. Tryptophan 2. Lysine 3. Histidine 4. Aspartic acid The […]
DBT BET JRF 2019 Previous Year Questions and Video solution
Understanding Fatty Acid Synthesis: The Reactions Involved and Their Roles
43. Which one of the following reactions DOES NOT occur in fatty acid synthesis? 1. Reduction 2. Dehydration 3. Decarboxylation 4. Phosphorylation The Reactions Involved in Fatty Acid Synthesis Fatty […]
DBT BET JRF 2018 Previous Year Questions and Video solution
Understanding the Role of Hair Cells in the Inner Ear as Receptors for Mechanical Cues
42. Hair cells in the inner ear act as receptors for which one of the following cues? 1. Temperature 2. Chemical 3. Mechanical 4. Orientation Hair Cells in the Inner […]
DBT BET JRF 2022 Previous Year Questions and Video solution
Role and Location of the TATA Box in Transcription Initiation
118. TATA box involved in the initiation of transcription is located in the: A. Promoter region B. Enhancer region C. Exon region D. Intron region Detailed Explanation: The TATA box […]
DBT BET JRF 2022 Previous Year Questions and Video solution
Effects of Serine-to-Aspartic Acid Mutation in Ligand Gated Channels
117. The ligand binding domain of a ligand gated channel (LGC) has a serine residue, phosphorylation of which is essential for ligand binding. By site directed mutagenesis it was replaced […]
DBT BET JRF 2018 Previous Year Questions and Video solution
Understanding the Analogy: Promoter to Transcription and Its Relation to Other Biological Processes
41. Promoter : transcription :: 1. Shine-Dalgarno : translation 2. DNA polymerase:replication 3. Ribosome:translation 4. DnaA:replication Understanding the Analogy: Promoter to Transcription The analogy between a promoter and transcription is […]
DBT BET JRF 2018 Previous Year Questions and Video solution
Mismatch Repair Pathway in E. coli: Identifying Parent and Daughter Strands
40. In E. coli, mismatch during replication is corrected by the mismatch repair (MMR) pathway. For this, the MMR proteins differentiate between the parent and daughter strand by: 1. Identifying […]
DBT BET JRF 2022 Previous Year Questions and Video solution
Calculating Feed Rate in Fed-Batch Reactors: Understanding Exponential Feeding
116. An exponentially increasing feed of concentrated substrate is fed into a fed batch reactor to maintain a constant specific growth rate 0.35 ℎ−1. If the feed is 5 ml/hr […]
