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RP9 a level biology aqa

Has anyone done the writing up for biology rp9 a level aqa as I'm struggling. On page 58/59 in the lab book.

The question asks, a student carried out this experiment with lactose as the respiratory substrate. No gas was obtained after 10 minutes. What is the most likely biological explanation for this result?

Also, it suggests an improvement for greater accuracy and precision

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Sorry you've not had any responses about this. :frown: Are you sure you've posted in the right place? :smile: Here's a link to our subject forum which should help get you more responses if you post there. :redface:

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