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

Define kingdom monera and protista?, Q. Which are the beings that constitut...

Q. Which are the beings that constitute the kingdom Monera? The kingdom Monera is the kingdom of the prokaryotes, archaebacteria and composed of bacteria. Q. Which are the

Linkage of health with development, Linkage of Health With Development ...

Linkage of Health With Development Health, in its comprehensive or holistic sense, refers to the state of completephysical, mental, social and spiritual well being of a person.

Gamete formation, During the life cycle of most animals, some diploid cells...

During the life cycle of most animals, some diploid cells undergo meiosis and haploid form in a process called gametogenesis. Spermatogenesis: In the testes of the male, the

What do you meant by medical transcriptionist, Question 1: Describe the...

Question 1: Describe the process of hearing. The ear consists of three basic parts - the outer ear, the middle ear, and the inner ear. Discuss the process of hearing

Mature embryo, Mature Embryo A typical dicotyledonous embryo, as seen ...

Mature Embryo A typical dicotyledonous embryo, as seen in a median longitudinal section, consists of an embryonal axis having two broad cotyledons. The portion of embryonal ax

Who could be the parents of a child, This problem refers to the MN and ABO ...

This problem refers to the MN and ABO loci mentioned in class. It also refers to the Rh locus, which is responsible for the positive/negative part of the blood type. The Rh+ allele

# FUNGAL NUTRITION, Write on spoilage of food products by fungi,nutrition,c...

Write on spoilage of food products by fungi,nutrition,condition for growth,consequencies and prevention.

Determine the principle of brain and behaviour, Determine the Principle of ...

Determine the Principle of Brain and Behaviour A second principle is that insight into children's adaptation can be gained through an analysis of brain behaviour relationships.

Explain about the secondary protein derivatives, Explain about the Secondar...

Explain about the Secondary Protein Derivatives? These are the products of further hydrolytic cleavage of the protein molecule, Examples include: a) Proteoses: Soluble in wa

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