A flask containing photosynthetic green algae and a control flask containing water with no algae are

5 answers
Question:

A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights that is set to cycle between 12 hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks are monitored. Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask. The dissolved oxygen in the flask with algae will .

Answers

Oxygen level in the flask that has algae, will be higher while in the flask that has no algae, oxygen level will be lower

Explanation:

Photosynthesis is such a type of process that takes place in those types of organisms in which green pigments are present. During this reaction or process, carbon dioxide and water react in the presence of sunlight and form glucose, ATP and water, and an oxygen molecule.  

Since algae have green pigments like chlorophyll and some other so, the process of photosynthesis occurs in these organisms and thus oxygen level increases. Those flasks in which algae are absent so do not show photosynthesis process and thus oxygen molecule is not evolved.

Explanation:

A) The flask with the algae

Aquatic green plants and algae contain chlorophyll, a specialized compound which facilitates the conversion of light energy to energy stored in carbohydrates. The oxygen produced is dissolved in the surrounding water and as dissolved oxygen.

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. Particles of light, and water is used as a reducing agent.

Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Respiration and photorespiration both utilize oxygen for;

the production of ATP via the oxidization of pyruvate;and the oxygenation of the molecule Ribulose 1,5-bisphosphate (RuBP), an organic molecule also used in photosynthesis, to form 3-PGA + phosphoglycolic acid,

∴ the rate of CO2 usage for photosynthesis where O2 is produced, outpaces the rate of O2 use in respiration and photorespiration.

Learn more about Photosynthesis at

#LearnWithBrainly

In the flask with algae, there would be photosynthesis in the presence of light which uses up the oxygen hence the dissolved oxygen in the flask with algae will be higher in the light but lower in the dark.

Dissolved O2 conc. in flask with algae will be higher since photosynthesis produces O2.

It will be milky because of the algae, but the other flask will not be milky

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