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Particular biological molecules react with chemicals called reagents to give distinct colour changes - VCE - SSCE Biology - Question 22 - 2010 - Paper 1
Question 22
Particular biological molecules react with chemicals called reagents to give distinct colour changes. The colour depends on the kind of biological molecule and the t... show full transcript
Worked Solution & Example Answer:Particular biological molecules react with chemicals called reagents to give distinct colour changes - VCE - SSCE Biology - Question 22 - 2010 - Paper 1
Step 1
The colours she would observe are
Answer
To determine the colours observed when different reagents are added to ribosomes, we have to refer to the combinations of the biological molecules present in the ribosomes with the respective reagents.
If we analyze the table:
- Adding reagent K (starch) would produce a dark blue colour.
- Adding reagent L (protein) would produce a violet colour.
- Adding reagent M (lipid) would result in a red colour.
- Adding reagent N (nucleic acid) will yield a green colour.
Considering the options provided:
- A (red and green) corresponds to lipid and nucleic acid.
- B (green and violet) corresponds to nucleic acid and protein.
- C (dark blue and red) corresponds to starch and lipid.
- D (violet and dark blue) corresponds to protein and starch.
Since the question suggests adding different reagents to isolated ribosomes, more than one colour can be observed in mixtures depending on the biological components present. The combinations of colours observed by adding selected reagents would be best represented by option B: green and violet.