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

Determinants of vascular tone, The vascular tone increases as the arterial ...

The vascular tone increases as the arterial size decreases. The tone at any time reflects the effects of excitory and inhibitory pathways. Neurotransmitters, physical forces like s

Define hydrolytic rancidity - lipolysis, Define hydrolytic rancidity Li...

Define hydrolytic rancidity Lipolysis is a major action occurring during deep fat frying due to large amounts of water introduced from the food and the relatively high temperat

What are nadph and nadp, Q. What are NADPH and NADP? NADP is the short ...

Q. What are NADPH and NADP? NADP is the short form of the nicotinamide adenine dinucleotide phosphate cation, a hydrogen acceptor. NADPH is made when NADP binds to one hydrogen

Explain phylum rhodophyta, Phylum Rhodophyta (Red algae) 1) The photosy...

Phylum Rhodophyta (Red algae) 1) The photosynthetic pigments include red pigments (phycoerythrin) and blue pigment (phycocyanin) apart from chlorophyll, of which red pigment pr

How are antivenoms produced, How are antivenoms produced? Why are antivenom...

How are antivenoms produced? Why are antivenoms an example of passive immunization? Antivenoms are getting by the following process: the venom (antigen) is inoculated into othe

Phylum annelida, describe the diversity in the feeding habits and locomotio...

describe the diversity in the feeding habits and locomotion of annelids

Relationship between the ovulation and menstrual cycle, Q. What is the rela...

Q. What is the relationship between the ovulation and menstrual cycle? Ovulation is the releasing of the female gamete from the ovary and Ovulation is a periodical event that o

Chromosomes, Chromosomes  are the condensed, fibrillar, self- replicating g...

Chromosomes  are the condensed, fibrillar, self- replicating genetic structures of cells containing the cellular DNA which bears in its nucleotide sequence the linear array of gene

Hormones secreted by the thyroid gland, Q. What are the hormones secreted b...

Q. What are the hormones secreted by the thyroid gland? What are their functions? The thyroid secretes the triiodothyronine (T3), hormones thyroxine (T4) and calcitonin. T3

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