Tag: DBT JRF PYQ 2020

BLOSUM matrix is used for 1. homology modelling 2. alignment of protein sequence 3. surface electrostatics 4. DNA homology Introduction In the world of bioinformatics, aligning protein sequences is a […]

Which of the following amino acids is most likely to disrupt an 𝜶 − 𝒉𝒆𝒍𝒊𝒙? 1. proline 2. valine 3. lysine 4. arginine   Introduction The α-helix is a common […]

Which histone is NOT a part of the nucleosomes? 1. H2B 2. H2A 3. H3 4. H1   Introduction Histones are fundamental to the structure of DNA within the cell. […]

The broad- spectrum herbicide glyphosate, the active ingredient of Roundup, inhibits this enzyme 1.Shikimate dehydrogenase 2. 5-enolpyruvylshikimate-3-phosphate synthase 3.Chorismate synthase 4. 3-deoxy-7-phosphoheptulonate synthase   Introduction Glyphosate is a widely used […]

Which class of phytochromes is highly abundant in etiolated seedlings and is also light labile? 1.Phytochrome D 2.Phytochrome B 3.Phytochrome A 4.Phytochrome C Introduction Phytochromes are a group of photoreceptor […]

The amino acid residue with the least preference for any quadrant in the Ramachandran map is 1. Valine 2. glycine 3. serine 4. alanine Introduction The Ramachandran map is a […]

Which of the following marine phototrophs can utilise carbon-dioxide as the carbon source? 1. Green sulfur bacteria 2. Halobacteria 3. Chloroacidobacteria 4. Hellobacteria Introduction Marine environments are home to a […]

Which of the following is a chemotherapeutic drug obtained from marine source? 1. adriamycin 2. avastin 3. trabectedin 4. abraxane   Introduction Chemotherapy is a vital part of cancer treatment, […]

Which of the following represents the correct sequence of steps in pathogenesis? 1. adhesion, exposure, infection, invasion 2. adhesion, infection, exposure, invasion 3. invasion, infection, adhesion, exposure 4. exposure, adhesion, […]

Embryonic stem cells are 1. unipotent 2. totipotent 3. pluripotent 4. differentiated Introduction Embryonic stem cells (ESCs) have revolutionized the field of developmental biology and regenerative medicine due to their […]