(what is stomata?)How do plants make food (photosynthesis basics)?

Discuss students’ knowledge of photosynthesis and respiration. How do these processes affect oxygen concentrations in lakes? Discuss the measures to be analyzed as indicators of photosynthesis and respiration.

Photosynthesis Background Resources

Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis.4.

How do plants make food (photosynthesis basics)?

It is interesting to note that the oxygen released during photosynthesis is not in fact derived from the carbon dioxide, but rather from the water molecules which are consumed in the reaction.

Photosynthesis Background Resources

However, it is important to note that this chemical equation is highly simplified; in reality photosynthesis employs a very complex mechanism for the adsorbption and conversion of light into chemical energy, using chemical pathways with many important intermediates.

What is the role of the NADPH molecule in photosynthesis?

Moroney JV and Somanchi A (1999) How do algae concentrate CO2 to increase the efficiency of photosynthetic carbon fixation? Plant Physiology 119: 9–16.

PHOTOSYNTHESIS – is a part of a leaves that makes the leaves green.

Direct students to complete the reading (Introduction to Cell Respiration and Photosynthesis) prior to carrying out the exercises and answering questions.

This tutorial introduces photosynthesis.

Sugars created in photosynthesis can be later converted by the plant to starch for storage, or it can be combined with other sugar molecules to form specialized carbohydrates such as , or it can be combined with other nutrients such as nitrogen, phosphorus, and sulfur, to build complex molecules such as and .

What are the reactants needed for photosynthesis to take place?

All of the sugar produced in the photosynthetic cells of plants and other organisms is derived from the initial chemical combining of carbon dioxide and water with sunlight.

Photosynthesis Background Resources

Effects of temperature, light and pH on photosynthesis, and of light-dark cycle on growth rate and biomass of Scrippsiella trochoidea and Alexandrium tamarense [J].

algae; photosynthesis; Calvin cycle; phytoplankton

Both pH values below 7.0 and above 9.0 significantly reduced the photosynthesis, growth rate, areal biomass productivity, total lipid content and areal lipid productivity compared with pH range of 7.0—9.0.

Part 2 - Investigating Photosynthesis and Respiration in Lakes

One significant group of such organism are bacteria which use instead of water in their photosynthetic pathway:Some of these produce globules of as a waste product instead of oygen, while others further oxidize it, producing .