Biotechnology
2020 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE BT 2020 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.
Question 51
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An infinite series S is given as:
S = 1 + 2/3 + 3/9 + 4/27 + 5/81 + … (to infinity)
The value of S is __________ (round off to 2 decimal places).
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Protein A and protein B form a covalent complex. Gel filtration chromatography of this complex showed a peak corresponding to 200 kDa. SDS-PAGE analysis of this complex, with and without beta-mercaptoethanol, showed a single band corresponding to molecular weight 50 and 25 kDa, respectively. Given that the molecular weight of protein A is 25 kDa, the molecular weight of protein B is __________ kDa.
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The concentrations of ATP, ADP and inorganic phosphate in a cell are 2.59, 0.73 and 2.72 mM, respectively. Under these conditions, free energy change for the synthesis of ATP at 37 °C is __________ kJ/mol (round off to 2 decimal places).
Given: free energy change for ATP hydrolysis under standard conditions is -30.5 kJ/mol and R = 8.315 kJ/mol.K
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