Chromatography of Photosynthetic Pigments (AQA A-Level Biology): 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 stationary phase in chromatography of photosynthetic pigments?
What is the stationary phase in chromatography of photosynthetic pigments?
The chromatography paper
How is the value calculated?
How is the value calculated?
Distance by pigment ÷ distance by solvent
Why must a pencil be used instead of pen to mark the chromatography paper?
Why must a pencil be used instead of pen to mark the chromatography paper?
Ink interferes with results
How many drops of acetone are added to extract pigments from the leaf sample?
How many drops of acetone are added to extract pigments from the leaf sample?
Exactly 20 drops
Which pigment typically has the highest value?
Which pigment typically has the highest value?
Carotenes
What happens to pigments with lower affinity to the paper?
What happens to pigments with lower affinity to the paper?
They travel further distances
What safety precaution is essential when working with chromatography solvents?
What safety precaution is essential when working with chromatography solvents?
Avoid naked flames
Why must the solvent front be marked immediately after removing the paper?
Why must the solvent front be marked immediately after removing the paper?
The boundary fades as solvent evaporates
What adaptation do shade-tolerant plants show in their pigment composition?
What adaptation do shade-tolerant plants show in their pigment composition?
Higher chlorophyll b relative to a
Why is the pigment spot reapplied 2-3 times?
Why is the pigment spot reapplied 2-3 times?
To concentrate the pigments