We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

The enzymic synthesis of starch Essay

Sorry, but copying text is forbidden on this website!

When green plants photosynthesise, the leaf produces simple sugars such as glucose, and sugar phosphates such as ribulose 1,5 biphosphate. These are transported to all leaf cells and other organs, and may be deposited as starch anywhere in the plant. The plant makes these products during the light independent stage of photosynthesis, and converts them to starch, other carbohydrates, lipids, and amino acids after the light independent stage and so light is not necessary.

This explains the presence of a small amount starch in the leaf cells left in the dark with glucose solution. Only a small amount is present because, starch can only be synthesised by using sugar phosphates and enzymic processes using starch phosphorylase enzymes. This would have been possible by using the small amounts of sugar phosphates already present in the leaves.

The presence of starch in the leaves left in glucose in the light is because the leaves have a plentiful supply of glucose, as well as being able to photosynthesise and produce their own simple sugars and phosphates. The reason for starch being present in the leaves left in water in the light, is that as there was plentiful light, the leaves had the capacity to photosynthesise, and produce their own glucose and other sugars and sugar phosphates, of which some was obviously converted to starch.

We will write a custom essay sample on The enzymic synthesis of starch specifically for you

Order now

No starch was present in the leaves in the water in the dark because no light was present so no sugars could be produced through photosynthesis, neither was there any glucose available for the leaves to convert into starch. The potato results prove the idea that starch can only be synthesised by using sugar phosphates, because tube C was the only one which showed any sign of there being starch present, and tube C was the only one that contained Glucose 1-phosphate as well as the starch phosphorylase.

Starch is used by cells for storage (in a starch grain), as the molecules are big and cannot get out. It is also insoluble and this means that it stays where it is put and does not dissolve in water. The leaf experiment already showed that phosphates are more important for making starch than light, and this just reinforces the fact. Evaluation The experiment could have produced inaccurate results. The leaves were placed in a cupboard, for a dark place and it may have allowed a small amount of light to get through.

The temperature in the cupboard and under the daylight lamp may have also fluctuated, altering the results. Also, when pouring the de-ionised water into the beaker for the leaves to rest on, some air may have been absorbed. The plant samples used were kept in a bin liner overnight before the experiment was done, to destarch the plant. This may not have been long enough for the plant to use all its starch reserves, which would mean that starch could have been detected when it was really there all the time.

How to cite this page

Choose cite format:

The enzymic synthesis of starch. (2017, Sep 16). Retrieved from http://ilovelimassol.com/the-enzymic-synthesis-of-starch-essay

We will write a custom essay sample onThe enzymic synthesis of starchspecifically for you

Our customer support team is available Monday-Friday 9am-5pm EST. If you contact us after hours, we'll get back to you in 24 hours or less.

By clicking "Send Message", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
No results found for “ image
Try Our service
online

Hi, I am Sara from Studymoose

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out http://goo.gl/CYf83b

online

Hi, I am Sara from Studymoose

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out http://goo.gl/CYf83b

image

Your Answer is very helpful for Us
Thank you a lot!

SitemapBusiness & Industrial | moroodloos ch iluu 1 mongol heleer shuud uzeh, | Chap 246