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Title: Name the radioactive molecule which was transported from source to sink Post by: mex on Feb 2, 2017 http://imgur.com/a/bJ7fx
Hi, for this question it asks 'Name the radioactive molecule which was transported from source to sink'. Since 14CO2 is the radioactive molecule, why isn't the answer carbon-14? The answer is sucrose which I don't understand. The second question asks what tissue and cell do you expect to find the most radioactive molecule in. Why will the cell not be the root hair cells? Is it because the plant isn't growing in the soil? Thanks Title: Re: Name the radioactive molecule which was transported from source to sink Post by: bio_man on Feb 2, 2017 The carbon dioxide is incorporated into the sugar that is made during photosynthesis. The sink is the sugar that is made, and since sugar is made from carbon-carbon bonds, that is derived from the carbon dioxide that the leaves take in.
Title: Re: Name the radioactive molecule which was transported from source to sink Post by: mex on Feb 2, 2017 So this is why sucrose has also become radioactive?
Can you also answer my second question please? Thanks The carbon dioxide is incorporated into the sugar that is made during photosynthesis. The sink is the sugar that is made, and since sugar is made from carbon-carbon bonds, that is derived from the carbon dioxide that the leaves take in. So this is why sucrose has also become radioactive? Can you also answer my second question please? Thanks Title: Re: Name the radioactive molecule which was transported from source to sink Post by: bio_man on Feb 3, 2017 Content hidden
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