Preparing for Practical Assessment (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the independent variable in an experiment?
What is the independent variable in an experiment?
The single variable deliberately changed
How many assessed practicals must students complete across two years of A-Level?
How many assessed practicals must students complete across two years of A-Level?
12 practicals
When using a microscope, which power should you always start viewing specimens on?
When using a microscope, which power should you always start viewing specimens on?
Low power
What should low-power microscope drawings be labelled with?
What should low-power microscope drawings be labelled with?
Tissue names only
Which unit should be used as the standard length unit in biology?
Which unit should be used as the standard length unit in biology?
Millimetres (mm)
In chromatography, Rf values are always:
In chromatography, Rf values are always:
Less than 1 with no units
Results are typically identified as anomalies if they differ from the mean by more than:
Results are typically identified as anomalies if they differ from the mean by more than:
10%
A percentage error below what value may be considered statistically insignificant?
A percentage error below what value may be considered statistically insignificant?
5%
When using a colorimeter for a starch-enzyme mixture with iodine, the blank should contain:
When using a colorimeter for a starch-enzyme mixture with iodine, the blank should contain:
Iodine solution
In electrophoresis, which molecules travel the furthest distance?
In electrophoresis, which molecules travel the furthest distance?
The smallest molecules