MDCAT Pakistan · Chemistry
Biomolecules, Solutions and Kinetics
8 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 8 questions
- What is the molality of a solution prepared by dissolving 18.0 g of glucose (C6H12O6, molar mass = 180 g/mol) in 250 g of pure water?
- At its isoelectric point (pI), in what ionic form does an amino acid predominantly exist in aqueous solution?
- Calculate the osmotic pressure exerted by a 0.020 M aqueous solution of sucrose at 27 °C (300 K), given R = 0.0821 L atm / (mol K).
- Which intermolecular bond type stabilizes the secondary structures (alpha-helix and beta-pleated sheets) of globular proteins?
- If doubling the concentration of reactant A quadruples the reaction rate, what is the order of reaction with respect to A?
- What is the freezing point depression constant (K_f) of water when 1.00 mol of a non-volatile non-electrolyte dissolved in 1.00 kg of water depresses the freezing point by 1.86 °C?
- According to the Arrhenius equation k = A * exp(-E_a / (RT)), what does a graph of ln(k) versus 1/T yield?
- What lipid class consists of three fatty acid molecules esterified to a single glycerol molecule and serves as the primary metabolic energy store in adipose tissue?
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