Theory

CH4 - CELL MEMBRANES AND TRANSPORT

(a) With reference to Fig. 3.1 and the information above, explain how flatworms survive without a transport system for respiratory gases. ...............

2009 Summer

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Cystic fibrosis is a disease where $Cl^-$ ions are unable to be transported into cells. Which structure in the cell surface membrane is faulty?

2009 Winter

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Diagrams 1 and 2 show how the transverse section through a leaf changes when moved from one solution W to a different solution Y. How has the water p...

2009 Winter

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The diagram shows a red blood cell and the concentrations of ions, in mmol dm-3, in the plasma and in the cell. Which ions are actively transported in...

2009 Winter

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

In an experiment, 5 cm$^3$ of 1 % salivary amylase are added to 100 cm$^3$ of different concentrations of starch.Which graph shows the results of plot...

2009 Winter

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

During an immune response, plasma cells secrete antibody molecules. Fig.1.1 is a diagram of an antibody molecule. The diagram is not complete. (a) ...

2009 Winter

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

(a) Cell surface membranes are involved with the movement of substances into and out of cells.Calcium pumps in cell surface membranes maintain a conce...

2009 Winter

Theory

CH4 - CELL MEMBRANES AND TRANSPORT

(a) With reference to Fig. 3.1, explain the effect of penicillin V on bacterium A........................................................................

2010 Summer

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

Which molecules, found in the cell surface membrane, have the properties listed? [Table 1]

2010 Winter

MCQ

CH4 - CELL MEMBRANES AND TRANSPORT

The stalk of a dandelion is a hollow tube. Pieces of the stalk are cut as shown and placed in sucrose solutions of different water potentials.Which di...

2010 Winter

MCQ

CH1 - CELL STRUCTURE

A cell organelle measures $4 \times 10^{-1}$ mm in diameter.What is the diameter in $\mu$m?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

In the following table, which is the correct comparison between light and electron microscopes? [Table_1: light microscope and electron microscope co...

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which structures are present in a typical plant cell? [Table_1]

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Plant cells are stained and then viewed through a light microscope.Which structures would be clearly visible at a magnification of ×400?

2011 Summer

MCQ

CH1 - CELL STRUCTURE

Which type of cell will contain the highest proportion of single membrane-bound structures?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Four different fruit juices, A, B, C and D, were tested with Benedict's solution. A second sample of each juice was hydrolysed and tested with Benedic...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which molecular bonds will be broken by hydrolysis when a molecule of glycogen is converted to glucose? [Table_1]

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which set of statements correctly describes haemoglobin?

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Some foods contain 'hydrogenated vegetable oils'. These are unsaturated fats that have been converted to saturated fats.Which property of the fats wil...

2011 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which rows show the chemical groups present in the biological molecules listed?[Table_1]

2011 Summer