List of top Biological Science Questions asked in IIT JAM BL

Three sides of a triangle are 1, 1 and 0.5 meters in length. The area of the triangle in m² is ............. (decimal digits up to 2 places)
The sum of the internal angles of a regular pentagon is ............ degrees
The maximum resolution in nm achieved through an oil immersion lens of numerical aperture 1.4 using an incident light of wavelength 380 nm is ........... (decimal digits up to 2 places)
At 2 mg/mL pure tubulin concentration, a microtubule consisting of 13 protofilaments grows unidirectionally at a rate of about 2 µm/min. At this growth rate, the number of tubulin dimers (each 8 nm in length) added to the ends of the microtubule each second is ............ (decimal digits up to 2 places)
The pitch of an α-helix is 5.4 Å. The approximate length of the α-helix consisting of 15 amino acids in Å is .............. (decimal digits up to 1 place)
A plasmid is digested with a restriction enzyme to produce three fragments of sizes 7 kb, 3 kb and 2 kb. To obtain 500 ng of a 3 kb fragment, the amount of plasmid required to be digested in µg is ..........
Choose the CORRECT statements about a nucleosome core particle
A bacterial culture growing at 20°C was shifted to 45°C. Incorporation of which of the following fatty acids in the membrane will be beneficial for its survival?
Which of the following statements are TRUE for phosphoinositide signaling cascade?
Bacterial superantigens
When grown in the presence of glucose and lactose together, E. coli does not utilize lactose first because
The copy number of a plasmid in bacterial cells can be determined by
For accurate determination of evolutionary relationship within elephants, an approach of choice would be to compare
Phospho-mimic mutants of proteins can be generated by replacing
Which of the following statements are CORRECT about meiosis?
Which of the following statements are TRUE for hexokinase and glucokinase?
Which of the following combinations of the statements about photorespiration is CORRECT? (P) Photorespiration generates no ATP
(Q) Photorespiration produces no glucose
(R) Photorespiration releases O\(_2\)
(S) Photorespiration does not occur in C\(_4\) plants
Which of the following statements about mature tRNA and/or mRNA are FALSE?
In human reproduction, (P) spermatogenesis starts at puberty
(Q) oogenesis starts at fetal stage
(R) following meiosis, one oogonium produces 4 eggs
(S) following meiosis, one spermatogonium produces 4 sperms
Which of the following techniques can be used to detect protein-protein interactions in-vivo?
(P) Two hybrid assay
(Q) Fluorescence resonance energy transfer
(R) Fluorescence recovery after photobleaching
(S) Gel-shift assay
The predominant mechanism of microRNA mediated regulation of gene expression is inhibition of:
3'-Azido-2',3'-dideoxy thymidine (AZT) with the structure shown above has potential to work as a drug against HIV because:
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During synthesis of N-linked glycosylated proteins in mammalian cells, which one of the following compositions of sugars is originally added as a core through dolichol-phosphate precursor?
A bacterium that arose 3.5 billion years ago divides once every 12 hours. Under ideal conditions, the number of generations the bacterium has undergone will be approximately:
A dihybrid phenotypic ratio of 15:1 was obtained while making a cross of AaBb × AaBb. This is an example of: