DP Chemistry Questionbank
B.7 Proteins and enzymes (HL only)
Description
[N/A]Directly related questions
- 18M.3.hl.TZ2.8g: A different series of pepsin samples is used to develop a calibration curve. ...
- 18M.3.hl.TZ2.8f: UV-Vis spectroscopy can be used to determine the unknown concentration of a substance in a...
- 18M.3.hl.TZ2.8d: Calculate the pH of a buffer system with a concentration of 1.25 × 10−3 mol dm−3 carbonic acid...
- 18M.3.hl.TZ1.9b: Outline the significance of the value of the Michaelis constant, Km.
- 18M.3.hl.TZ1.9a: Explain with reference to the binding site on the enzyme how a non-competitive inhibitor lowers...
- 17N.3.hl.TZ0.11b.ii: Draw a curve on the graph above showing the effect of the presence of the malonate ion inhibitor...
- 17N.3.hl.TZ0.11b.i: The malonate ion acts as an inhibitor for the enzyme. Suggest, on the molecular level, how the...
- 17N.3.hl.TZ0.11a: Determine the value of the Michaelis constant, Km, by annotating the graph.
- 17M.3.hl.TZ2.13c: Outline the significance of the value of Km.
- 17M.3.hl.TZ2.13b: Sketch a second graph on the same axes to show how the reaction rate varies when a competitive...
- 17M.3.hl.TZ2.13a: Determine the value of the Michaelis constant, Km, including units, from the graph.
- 17M.3.hl.TZ2.8c.ii: Calculate the pH of a buffer solution which contains 0.700 mol dm–3 of the zwitterion and 0.500...
- 17M.3.hl.TZ1.15c: Outline the action of a non-competitive inhibitor on the enzyme-catalysed reaction.
- 17M.3.hl.TZ1.15b: Enzymes are biological catalysts. The data shows the effect of substrate concentration, [S], on...
- 17M.3.hl.TZ1.15a: Deduce the pH range in which glycine is an effective buffer in basic solution.
- 16N.3.hl.TZ0.14b: (i) Outline what is meant by product inhibition as it applies to hexokinase. (ii) Product...
- 16N.3.hl.TZ0.14a: (i) Estimate the Km values of the two enzymes. (ii) Suggest, with a reason, which enzyme will...
- 16N.3.hl.TZ0.13c: Amino acids act as buffers in solution. In aspartic acid, the side chain (R group) carboxyl has...
- 16M.3.hl.TZ0.12b: Enzyme solutions are prepared in buffers. Determine the pH of a buffer solution containing...
- 16M.3.hl.TZ0.12a: The graph below shows a Michaelis–Menten plot for an enzyme. Sketch and label two curves on the...
- 15M.1.hl.TZ1.29: Which mixture will form a buffer in aqueous solution? A. ...
- 15M.1.hl.TZ2.27: The \({\text{p}}{K_{\text{a}}}\) of ethanoic acid is 4.8 at 298 K. Which combination will produce...
- 15M.2.hl.TZ1.8d.iii: Determine the pH of the solution resulting when \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of...
- 15M.2.hl.TZ2.4c: Calculate the concentration, in \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\), of sodium...
- 15M.3.hl.TZ1.8b: Explain how competitive inhibition in an enzyme-catalysed reaction takes place.
- 15M.3.hl.TZ1.8c: Sketch, on the graph on page 13, a curve which shows competitive inhibition occurring in this...
- 15M.3.hl.TZ1.8d: Silver ions bond with sulfur atoms in an enzyme and change its tertiary structure and activity....
- 15M.3.hl.TZ2.11a: Outline the essential features of the structure of a section of one strand of DNA.
- 14M.2.hl.TZ1.7c.iii: Determine the pH of the buffer solution at 298 K.
- 14M.2.hl.TZ2.5b.v: Partial neutralization of chloric(I) acid creates a buffer solution. Given that the...
- 14N.1.hl.TZ0.28: A buffer solution is formed by mixing equal volumes of...
- 14N.3.hl.TZ0.8: Describe three characteristics of enzymes.
- 13N.3.hl.TZ0.9b.iii: Suggest a reason why it is more likely that NO, rather than \({\text{C}}{{\text{N}}^ - }\), acts...
- 13N.3.hl.TZ0.9b.ii: The graph below shows the effect of substrate concentration on the rate of the reaction in the...
- 13M.3.hl.TZ1.B4b.ii: Explain the action of competitive and non-competitive inhibitors on enzymes in terms of where the...
- 13M.3.hl.TZ1.B4b.iii: State how inhibitors affect the values of \({V_{{\text{max}}}}\) and the Michaelis constant,...
- 13M.3.hl.TZ1.B4b.i: State how inhibitors affect the initial rate of reaction of an enzyme with its substrate.
- 13M.3.hl.TZ2.B3b.ii: Explain why a low value of \({K_{\text{m}}}\) is significant.
- 13M.3.hl.TZ2.B3b.iii: State and explain the effect of a competitive inhibitor on the value of \){K_{\text{m}}}\).
- 12N.2.hl.TZ0.3b: Determine the pH of a buffer solution, correct to two decimal places, showing your working,...
- 10N.1.hl.TZ0.26: Which mixtures act as buffer solutions? I. ...
- 09N.3.hl.TZ0.B2c.ii: Draw a line on the graph to represent the effect of adding a competitive inhibitor.
- 09N.3.hl.TZ0.B2c.i: Use the graph to determine \({V_{\max }}\) and the Michaelis constant,...
- 09N.3.hl.TZ0.B2d: State and explain the effects of heavy-metal ions and temperature increases on enzyme activity.
- 10M.2.hl.TZ1.3e: Determine the pH of a solution formed from adding \({\text{50.0 c}}{{\text{m}}^{\text{3}}}\) of...
- 10M.2.hl.TZ1.3f: (if acid added)...
- 10M.2.sl.TZ1.3a.iii: Outline why the polymerization of alkenes is of economic importance and why the disposal of...
- 10M.2.hl.TZ2.7b: (i) Deduce the acid and conjugate base ions that make up the phosphate buffer and state the...
- 09M.3.hl.TZ1.B4b: Enzymes are affected by inhibitors. Lead ions are a non-competitive inhibitor, they have been...
- 09M.3.hl.TZ2.B4b: Determine the Michaelis constant \({K_{\text{m}}}\) from the graph.
- 09M.3.hl.TZ2.B4d: Explain the effect of competitive inhibition on \({V_{{\text{max}}}}\) and \({K_{\text{m}}}\).
- 09M.3.hl.TZ2.B4c: Describe why competitive inhibition may take place.
- 09M.3.hl.TZ2.B4e: On the graph of effect of concentration on rate of reaction on page 10, sketch the expected curve...
- 11M.3.hl.TZ1.B4a: Identify the type of inhibition shown in the graph.
- 11M.3.hl.TZ1.B4b: Determine \({V_{\max }}\) and \({K_{\text{m}}}\) in the absence of the inhibitor and in the...
- 11M.3.sl.TZ2.B2b: Explain, using equations, how the amino acid glycine (Gly) can act as a buffer
- 12M.3.hl.TZ2.B3b: When an inhibitor is added it decreases the rate of an enzyme-catalysed reaction. State the...
- 12M.3.hl.TZ2.B3c: (i) Sketch a graph to show the effect that a change in pH will have on the rate of an...
