Carbon dioxide for photosynthesis, Biology

Assignment Help:

Aim: To prove that Carbon dioxide is essential for photosynthesis.
Apparatus: A potted healthy plant with long and narrow leaves, a wide mouthed glass bottle, split cork.
Chemicals: Potassium Hydroxide solution (KOH), vaseline, Iodine solution.
Procedure :
1) Select a healthy potted plant with long and narrow leaves and keep it in darkness for two or three days so that leaves are free from starch. Take a wide mouthed glass bottle, a cork.
2) Take 5-10ml of potassium hydroxide solution into the bottle.
3) Close the mouth of the bottle with split cork.
4) Early in the morning insert one selected half of the leaf without cutting it from the plant, into the bottle through the split cork.
5) The other half of the leaf is outside the cork.
6) The bottle is kept air tight by applying vaseline around the rim of the mouth of the bottle.
7) Keep this apparatus in sun light for 3-4 hours. After the completion of time, detach the leaf from the plant and take it out of the bottle.
8) Test the detached leaf for starch test with iodine solution.
Observation : The part of the leaf which is inside the bottle does not turn deep blue, while the basal part of the leaf that is exposed to surroundings prepares starch and turns deep blue.
Inference : The potassium Hydroxide absorbs the carbon dioxide present inside the bottle hence the leaf inside the bottle does not turn deep blue, while the basal part of the leaf that is exposed to surroundings prepares starch and turns deep blue.

Conclusion : Green leaves can perform photosynthesis only when Carbon dioxide is available. Hence carbon dioxide is essential for photosynthesis.
Precautions :
1. The bottle should be kept airtight by applying vaseline around the rim of the mouth of the bottle.
2. Make sure that potassium hydroxide does not come in contact with leaf inside the bottle.
3. The leaf should not be detached from the plant till the experiment is completed.

1175_Carbon dioxide is essential for photosynthesis.png


Related Discussions:- Carbon dioxide for photosynthesis

How are the antibodies against the rh factor formed, How are the antibodies...

How are the antibodies against the Rh factor formed? Anti-Rh antibodies are made by humoral immune response. When an Rh- individual makes contact with the Rh factor this is rec

Why a female frog has a genetic trait, A female frog has a genetic trait th...

A female frog has a genetic trait that stops it from producing eggs. How likely is it that this trait will spread by the frog population? Explain your answer. This trait will

Volvox, what is the necessity of interdependence of a volvox organism in th...

what is the necessity of interdependence of a volvox organism in the colonial existence?

In which area dietitians works, In which area Dietitians works Dietitia...

In which area Dietitians works Dietitians can work in a variety of areas, as already mentioned earlier, many of these are in the  Hospitals or in  the community  as  'Clinical

Define the functional properties of hydrocolloids, Define the functional pr...

Define the functional properties of hydrocolloids The hydrocolloids not only have the functional properties but also have nutritional characteristics. Most polysaccharide gums

How to indicate an av block, During the course of a physiology laboratory, ...

During the course of a physiology laboratory, a student finds that her PR interval is 0.24 second. Concerned, she takes her own ECG again an hour later and sees an area of the ECG

Show protective structures of the central nervous system, Q. What are the p...

Q. What are the protective structures of the central nervous system present in vertebrates? In vertebrates the brain and the spinal cord are protected by membranes, the meninge

Antibodies, Antibodies Antibodies are important.tools for detecting and...

Antibodies Antibodies are important.tools for detecting and localising specific molecules in the cells due to their high specificity. The first requirement for this is to produ

Describe intemittent mandatory ventilation, Describe Intemittent Mandatory ...

Describe Intemittent Mandatory Ventilation (IMV) Mandatory breaths are delivered at set tidal volumes and rates, and the patient can breathe on his own in between through a un

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd