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

The actual length of a cell structure is 8 µm. Which steps are used to calculate the magnification of an electron micrograph of this cell structure?...

2019 Summer

MCQ

CH1 - CELL STRUCTURE

What is the typical resolution of a microscope using daylight as a light source with a ×10 eyepiece lens and a ×40 objective lens?

2019 Summer

MCQ

CH1 - CELL STRUCTURE

Two different types of cell, P and Q, were broken up using ultrasound and their contents analysed. Both types of cell contained small circular DNA. Th...

2019 Summer

MCQ

CH1 - CELL STRUCTURE

Which features shown in the diagram can be present in viruses?

2019 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

After boiling a sample of milk with Benedict’s solution, a yellow colour is observed. Which conclusion about the sample of milk is correct?

2019 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which of the statements about polysaccharides can be used to describe amylose and cellulose?1. contains 1,4 glycosidic bonds2. contains 1,6 glycosidic...

2019 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which diagram shows the formation of a peptide bond?

2019 Summer

MCQ

CH3 - ENZYMES

In enzyme-catalysed reactions, the position of the amino acids found at the active site is important. During the synthesis of enzymes, amino acids are...

2019 Summer

MCQ

CH2 - BIOLOGICAL MOLECULES

Which features affect the tensile strength of collagen?1 the helical structure of collagen chains2 the small R group of the amino acids in collagen3 t...

2019 Summer

MCQ

CH3 - ENZYMES

A fixed volume of the enzyme catalase was added to a fixed volume of hydrogen peroxide solution. The diagram shows how the concentration of product ch...

2019 Summer