MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The diagram shows how nicotine is transported from the blood plasma into a cell using a type of cotransporter mechanism.In the phloem tissue, there is...

2024 Summer

4

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Which process always takes place without the involvement of energy from ATP?

2024 Summer

3

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

What is the correct range of measurements for the width of the cell surface membrane?

2024 Spring

3

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The diagram shows the entry of molecule X into a cell. Which row shows a property of molecule X and the effect of the concentration of ATP in the cyto...

2024 Summer

3

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

A student observed the effect of two different concentrations of salt solution on blood cells.The student added each concentration of salt solution to...

2024 Summer

4

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Where in the cell surface membrane are the carbohydrate chains of glycoproteins and glycolipids mainly located? [Table_1]

2024 Spring

3

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The electron micrograph shows some human blood cells.Which row correctly shows the net movement of water by osmosis and the water potential of the cyt...

2024 Summer

4

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The diagram shows part of a cell surface membrane. Which row correctly identifies the molecules labelled 1 and 2?

2024 Winter

3

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Sodium ions can enter cells across the cell surface membrane.Which methods could be used by sodium ions to cross a cell surface membrane and enter a c...

2024 Spring

4

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Which statement correctly describes facilitated diffusion?

2024 Summer

4

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