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

MCQ

CH1 - CELL STRUCTURE

What are the appropriate units for measuring diameters of alveoli, diameters of white blood cells and the width of cell walls?[Table_1]

2015 Summer

1

MCQ

CH1 - CELL STRUCTURE

The diagram shows a high-power drawing of a bacterium. Which three components are found in both this bacterium and an animal cell?

2015 Summer

1

MCQ

CH1 - CELL STRUCTURE

The diagram shows a stage micrometer scale on which the small divisions are 0.1 mm. It is viewed through an eyepiece containing a graticule. The st...

2015 Summer

1

MCQ

CH1 - CELL STRUCTURE

Which structures are found in typical eukaryotic cells?1. 70S ribosomes2. 80S ribosomes3. linear DNA (chromosomes)4. circular DNA

2015 Summer

1

MCQ

CH1 - CELL STRUCTURE

What is the function of the nucleolus?

2015 Summer

1

MCQ

CH1 - CELL STRUCTURE

The electronmicrograph shows a cell. What is the actual diameter of the nucleus?

2015 Summer

1

MCQ

CH2 - BIOLOGICAL MOLECULES

A student carried out four tests for biological molecules on a solution. The observations are shown in the table.[Table_1]Which molecules may be prese...

2015 Summer

1

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show different types of bond found in biological molecules.Which combination of bonds could not be found in a protein with a tertiary str...

2015 Summer

1

MCQ

CH2 - BIOLOGICAL MOLECULES

Which row shows the correct match between the descriptions of biological molecules and where they are found?1 a linear polymer of 1,4 linked β-glucos...

2015 Summer

2

MCQ

CH2 - BIOLOGICAL MOLECULES

Which is the correct description for the structure of amylose and cellulose? [Table_1]

2015 Summer

1