List of top Life Science Questions asked in GAT-B

The catalytic triad of Chymotrypsin is composed of
Telomerase, an RNA-protein complex, adds telomeres at the end of chromosomes. What kind of enzymatic activity does it possess?
Which one of the following is commonly used for converting cellulose raw materials into glucose?
The degree of inhibition for an enzyme catalyzed reaction at a particular inhibitor concentration is independent of the initial substrate concentration. This is
Which of the following is true for a water sample with a BOD value of more than 50 ppm?

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An enzymatic reaction exhibits Michaelis–Menten kinetics. What will happen if the concentration of enzyme is doubled keeping \( [S_0] \gg [E] \)?
The most widely used method for removing of particulate matter from gas is
Tuberculosis (TB) is caused by Mycobacterium tuberculosis. The TB vaccine is made using

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Of the amino acids listed below, which three amino acids can undergo posttranslational modification?
The presence of excess nutrients in aquatic system will lead to

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A mixture of proteins (A, B, C and D) is separated on a Sephadex G-200 column. The proteins elute in the order of A, B, C and D. Assuming that all proteins are globular and monomeric, the protein with minimum electrophoretic mobility on SDS-PAGE will be
Rancidity in spoiled foods is mainly due to
A suicide plasmid vector lacks the following
In N-linked glycoproteins, carbohydrate moiety is attached to which of the following amino acids?
Which one of the following statements is correct about various microbial culture media?
Which of the following options correctly match the name of gene and its function in cloning vector pBR322?

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Many enzymes catalyze both forward and reverse reactions. Which one of the following statement is NOT correct?
A polymerase chain reaction yields 1.2 billion copies of DNA in 30 cycles. How many cycles would be needed to obtain 300 million copies?
The biocide DDT (a chlorinated hydrocarbon) has a half-life of around
Which one of the following waste treatment system is devoid of any packing material, and it recycles internal biomass based on gravity?
A biochemist is pelleting down the microsomal fraction from a sample using ultracentrifuge at a speed of 20000 rpm. What would be RCF if the diameter of the rotor is 7 cm?