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

Which statements about resolution and magnification are correct?[Table_1]

2018 Summer

MCQ

CH1 - CELL STRUCTURE

An eyepiece graticule has a scale with 100 divisions. A stage micrometer has a scale with 50 divisions, each of which is 0.040 mm apart. Using a ×40 ...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

A prokaryotic cell which is 1 µm in diameter, is magnified 50000 times in an electron micrograph. What is the diameter of the cell in the electron m...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

A scientist carried out an experiment to separate cell structures in animal cells. The cells were broken open to release the cell structures. This ext...

2018 Summer

MCQ

CH1 - CELL STRUCTURE

Radioactively-labelled nucleotides are introduced into a cell.In which cell structures will the radioactivity first become concentrated?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

What is the general formula for amylose?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagram shows relationships between some important molecules and bonds. What is represented by circles numbered 1, 2 and 3?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

In unsaturated lipid molecules, where are double bonds located?

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Phospholipids and triglycerides are important biological molecules.Which properties are correct for these molecules?[Table_1]

2018 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

The diagrams show two arrangements of amino acids in a protein. Which row correctly names the bonds at S or T?

2018 Summer