One to four mark questions

One to four mark questions will start with command words such as 'describe' or 'explain'. Some command words are easy to understand such as:

  • 'calculate' or 'determine' for maths questions
  • 'complete' to fill in a gap in a table or graph
  • 'define' to give the meaning of an important word
  • 'suggest' where you use your knowledge in an unfamiliar situation
  • 'compare' where you describe the similarities and/or differences between things

The command words 'describe' and 'explain' can be confusing. If you are asked to describe a graph, you will be expected to write about its overall shape, whether it is linear or curved, the slope of gradients etc. If you are asked to explain why a pattern or trend is seen in a graph, you will be expected to use your science knowledge, not just say what you see (which is a description). For example, 'The graph shows a steep linear increase for the first three hours because...'

Explain 'how and why' questions often have the word 'because' in their answer. Describe questions don't.

The number of marks per question part is given in this form '[2 marks]'. It is essential that you give two different answers if a question is worth two marks. Sometimes you can gain a second mark by giving the units in a calculation or stating specific data points, eg 'During the first two years the number of lions decreased by seven.'

You will be expected to write in more depth for three and four mark questions. They might ask you about a process such as the carbon cycle or the method you would use in an experiment.

While the examples below are given as bullet points, you should always write your answers in full sentences.

These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.

Sample question 1 - Foundation

Question

Give two differences between plant and animal cells. [2 marks]

Any two from:

  • plant cells have a cell wall, animal cells do not
  • plant cells have permanent vacuoles, animal cells do not
  • plant cells have chloroplasts, animal cells do not

[2]

Sample question 2 - Foundation

Question

Describe the effect of temperature on the rate of reaction of the enzyme. [3 marks]

Y axis: enzyme activity. X axis: temperature, centigrade.  Plotted line climbs slowly until about half way on x axis. Climbs steeply to optimum temperature then falls steeply to 0.

The rate of reaction increases as the temperature increases up to the optimum temperature. [1]

As temperatures increase above the optimum the rate of reaction decreases to 0. [1]

The enzyme is now denatured and won't work. [1]

Sample question 3 - Foundation

Question

Define the term stem cell. [1 mark]

A stem cell is an undifferentiated cell. [1]

Sample question 4 - Higher

Question

Name the type of cell in plants that can differentiate into different types of cell. [1 mark]

Meristem cell or meristematic cell. [1]

Note that you must be specific. It isn't sufficient to call it a 'stem cell', as stem cells occur in animals.

Sample question 5 - Higher

Question

Compare the location of the genetic information in a prokaryote and eukaryote cell. [2 marks]

The genetic information in a eukaryotic cell is enclosed in a nucleus. [1]

The genetic information in a prokaryotic cell is loose in the cytoplasm. [1]