List of top Biological Science Questions

The number of NADPH molecules required for the synthesis of palmitate (C16:0) from acetyl CoA is ..........
The number of peptide fragments generated from the sequence: Ala-Trp-Val-Ala-Phe-Thr-Gly-Lys-Glu-Tyr-Asp-Ser-Lys on treatment with chymotrypsin is ..........
A ball is dropped from a height of 1 meter. Every time the ball bounces up, it reaches 50% of the height of the previous bounce (i.e., it rises up to 0.5 meters on the first bounce, 0.25 meters on the second bounce and so on). After an infinitely long time, the total distance covered by the ball in m is ...........
The maximum velocity of an enzymatic reaction is 0.4 mole/sec. At 5 mM concentration of the substrate, the reaction velocity was found to be 0.2 mole/sec. If the enzyme shows standard Michaelis-Menten kinetics, the rate of the reaction at 10 mM substrate concentration in mole/sec is ............ (decimal digits up to 3 places)
Ram's mother is thrice his age now. Ten years from now, she will be twice his age. Ram's present age is ............... years
An unbiased coin is tossed 4 times. The probability of getting exactly 2 heads and 2 tails in any order is ........... (decimal digits up to 2 places)
The prevalence of a severe form of sickle-cell anemia (ss) in an African population is 16%. The percentage of the population resistant to malaria because of heterozygous (Ss) genotype for the sickle-cell gene is ............
A chromatin fiber of 40 nm length contains 25 nucleosomes (200 bp per nucleosome). The degree of compaction of DNA associated with this chromatin fiber is .............. fold (decimal digits up to 1 place)
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)
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)
A protein solution gives absorbance of 0.34 at λ280 using 0.5 cm path length cuvette. Given the extinction coefficient of the protein is 3.4 × 10³ M⁻¹ cm⁻¹, the concentration of protein in the solution in mM is ....... (decimal digits up to 2 places)
A pentapeptide consisting of amino acids with molecular weights of 165, 131, 75, 204 and 146 Da has an approximate molecular weight (in Da) of ..........
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 ..........
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
The copy number of a plasmid in bacterial cells can be determined by
Choose the CORRECT statements about a nucleosome core particle
When grown in the presence of glucose and lactose together, E. coli does not utilize lactose first because
Phospho-mimic mutants of proteins can be generated by replacing
Which of the following statements are TRUE for hexokinase and glucokinase?
For accurate determination of evolutionary relationship within elephants, an approach of choice would be to compare