Multiple choice questions

Multiple choice questions are perhaps the easiest to complete - you simply put a cross in a box - however, the questions often have two answers that could, at first glance, be correct. Don't make the mistake of reading the first answer and thinking this is correct without checking all the others.

If it says 'Tick one box', you must tick one box. If you leave it blank or tick two or more boxes you will get zero marks. These multiple choice questions will not start with command words like 'Describe...' or 'Explain...'. They will be written in the form of a question like 'What...?' or 'Why...?'.

There will be more multiple choice questions on the Foundation paper.

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

How is carbohydrate stored in plants? Tick one box. [1 mark]

ACellulose
BStarch
CProtein
DLipids
ACellulose
BStarch
CProtein
DLipids

Plants build up cellulose, but it is used to produce their cell walls, and it is not a storage compound.

Plants can store proteins and lipids - in particular, in their seeds - but these are not carbohydrates.

Sample question 2 - Foundation

Question

Which of the following are true of gas exchange in plants? Tick two boxes. [2 marks]

APlants take up oxygen at night
BThere is a net production of oxygen during the day
CUptake and output of carbon dioxide is balanced during the day
DCarbon dioxide is produced during the night only
APlants take up oxygen at night
BThere is a net production of oxygen during the day
CUptake and output of carbon dioxide is balanced during the day
DCarbon dioxide is produced during the night only

Plants are photosynthesising and respiring during the day, but there is a net production of oxygen and uptake of carbon dioxide.

At night, plants respire only, taking up oxygen and releasing carbon dioxide.

Sample question 3 - Higher

Question

Which one of the following molecules is the storage form of carbohydrate in humans? Tick one box. [1 mark]

AGlycogen
BStarch
CGlucose
DLipid
AGlycogen
BStarch
CGlucose
DLipid

Lipids are also stored in humans - under the skin and around some body organs - but they are not carbohydrates. Starch is not stored in humans. Glucose is a carbohydrate but it is very difficult to store.

Sample question 4 - Higher

Question

Which two of the following would increase the rate of photosynthesis? Tick two boxes. [2 marks]

AIncreasing the temperature from 40°C to 60°C
BIncreasing the light intensity from 100 lux to 400 lux
CIncreasing the carbon dioxide concentration from 0.4 per cent to four per cent
DDecreasing the temperature from 20°C to 10°C
AIncreasing the temperature from 40°C to 60°C
BIncreasing the light intensity from 100 lux to 400 lux
CIncreasing the carbon dioxide concentration from 0.4% to 4%
DDecreasing the temperature from 20°C to 10°C

Increasing the light intensity and carbon dioxide concentration will speed up the rate of photosynthesis.

Increasing the temperature from 40°C to 60°C will denature the enzymes involved in photosynthesis, while decreasing it from 20°C to 10°C will slow down the collisions between the enzymes and substrates involved in photosynthesis, lowering the rate of reaction.