Two-dimensional electrophoresis of proteins is one technique used to study the products of gene action within a cell - VCE - SSCE Biology - Question 13 - 2011 - Paper 1
Question 13
Two-dimensional electrophoresis of proteins is one technique used to study the products of gene action within a cell. The first separation of proteins is based on pH... show full transcript
Worked Solution & Example Answer:Two-dimensional electrophoresis of proteins is one technique used to study the products of gene action within a cell - VCE - SSCE Biology - Question 13 - 2011 - Paper 1
Step 1
A. protein N has the same pH as protein P.
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Answer
This statement is true according to the results. As proteins are separated based on their pH, protein N being in the same position as protein P indicates they share the same pH level.
Step 2
B. protein T has a lower pH than protein M.
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Answer
This statement is true. The figure shows protein T is positioned lower than protein M, which means it has a lower pH value.
Step 3
C. protein Q has the same molecular size as protein R.
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Answer
This statement is false. The electrophoresis results show protein Q is not aligned with protein R, indicating different molecular sizes.
Step 4
D. protein M has a greater molecular size than protein S.
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Answer
This statement is true. Protein M appears higher in the gel compared to protein S, indicating it likely has a larger molecular size, as larger proteins tend to move slower through the gel.
