MCQ

CH3 - ENZYMES

Which row describes the expected effect on $V_{max}$ and $K_m$ when a competitive reversible inhibitor is added to an enzyme-catalysed reaction? [Tab...

2024 Summer

1

MCQ

CH3 - ENZYMES

What is the correct order of locations in the cell for the production of an extracellular enzyme?

2024 Summer

3

MCQ

CH3 - ENZYMES

The graph shows the effect of substrate concentration on the rates of reaction of three enzymes, X, Y, and Z.What is the correct order of affinity of ...

2024 Summer

1

MCQ

CH3 - ENZYMES

Many flowers produce a sweet solution called nectar. Bees provided with nectar use enzyme Q to change the nectar into honey. After testing a sample of...

2024 Spring

4

MCQ

CH3 - ENZYMES

The graph shows the trend from an enzyme-catalysed reaction. Which labels are correct for the x-axis and y-axis?[Table_1]

2024 Summer

2

MCQ

CH3 - ENZYMES

A student carried out investigations at pH 1–8 to look at the effect of pH on an enzyme-catalysed reaction.The optimum condition for this enzyme is ...

2024 Winter

3

MCQ

CH3 - ENZYMES

Which statements about the Michaelis–Menten constant ($K_m$) are correct?1. The higher the $K_m$, the higher the enzyme affinity for the substrate.2...

2024 Summer

4

MCQ

CH3 - ENZYMES

A scientist investigated the progress of two enzyme-catalysed reactions in separate test-tubes, X and Y. Both reactions result in colour changes that ...

2024 Spring

4

MCQ

CH3 - ENZYMES

Which statement is correct for a non-competitive inhibitor?

2024 Winter

3

MCQ

CH3 - ENZYMES

Pyrophosphatase enzymes catalyse a hydrolysis reaction.In experiment 1, a scientist studied the rate of this reaction, using a colorimeter.The absorba...

2024 Winter

1

Theory

CH2 - BIOLOGICAL MOLECULES

(a) Fig. 1.1 shows the breakdown of a molecule of sucrose.(i) Name the bond indicated by T...............................................................

2010 Summer

3

Theory

CH1 - CELL STRUCTURE

(a) Calculate the actual diameter of the alveolus along the line X–Y.Show your working and give your answer to the nearest micrometre.Answer = ........

2010 Summer

3

Theory

CH8 - TRANSPORT IN MAMMALS

(a) Fig. 3.1 shows a cross-section of the heart at the level of the valves.[Image_1: Fig. 3.1](i) Complete the following flow chart to show the pathwa...

2010 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

Malaria and tuberculosis (TB) are two of the most important infectious diseases.(a) Define the term \textit{infectious disease}..........................

2010 Summer

3

Theory

CH6 - NUCLEIC ACIDS AND PROTEIN SYNTHESIS

(a) Name the stage during the mitotic cell cycle when replication of DNA occurs..........................................................................

2010 Summer

2

Theory

CH1 - CELL STRUCTURE

(a) Name the processes that occur at H, J and K.H .......................................................................................................

2010 Summer

3

Theory

CH1 - CELL STRUCTURE

(a) Explain how Fig. 1.1 can be identified as a plant cell...............................................................................................

2010 Summer

3

Theory

CH8 - TRANSPORT IN MAMMALS

Fig. 2.1 is a diagram of a vertical section through a healthy mammalian heart. (a) (i) Label the two chambers of the heart by writing in the boxes pro...

2010 Summer

2

Theory

CH10 - INFECTIOUS DISEASE

(a) Using the ‘without HIV/AIDS’ and ‘with HIV/AIDS’ data shown in Table 3.1, calculate the percentage decrease in life expectancy for Botswan...

2010 Summer

3

Theory

CH2 - BIOLOGICAL MOLECULES

Fig. 4.1 shows the primary structure of a lysozyme molecule, an enzyme found in tears, saliva and in lysosomes. (a) (i) Explain what is meant by th...

2010 Summer

3