GATE BT 2019 Paper 1 — page 19

Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.

A UV-visible spectrophotometer has a minimum detectable absorbance of 0.02. The minimum concentration of a protein sample that can be measured reliably in this instrument with a cuvette of 1 cm path length is ______ μM. The molar extinction coefficient of the protein is 10,000 L mol⁻¹ cm⁻¹.

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The difference in concentrations of an uncharged solute between two compartments is 1.6-fold. The energy required for active transport of the solute across the membrane separating the two compartments is ______ cal mol⁻¹ (rounded off to the nearest integer). (R = 1.987 cal mol⁻¹ K⁻¹, T = 37 °C)

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In pea plants, purple color of flowers is determined by the dominant allele while white color is determined by the recessive allele. A genetic cross between two purple flower-bearing plants results in an offspring with white flowers. The probability that the third offspring from the parents will have purple flowers is ______ (rounded off to 2 decimal places).

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2019 · Paper 1

Question 45

Question 46

Question 47