Bromthymol Blues Lab Introduction In this lab our group will demonstrate if carbon dioxide (CO2) is present during photosynthesis and cellular respiration. We will attempt this experiment by using an indicator called bromthymol blue. This indicator will turn yellow if CO2 is present during cellular respiration and during photosynthesis the indicator will turn from yellow to blue if the CO2 has been absorbed by the plant. II. Purpose To demonstrate that CO2 is used during photosynthesis.
Photosynthesis is broken down into two separate stages, the light-dependent reactions and light-independent reactions. In the light-dependent reaction, the chloroplast traps light energy from the sun and it is converted into ATP and NADPH energy. In the light-independent reaction, NADPH delivers the hydrogen and carbon dioxide atoms that help form glucose, and ATP donates energy to areas where glucose is put together from carbon. This process occurs in chlorophyll bearing cells. Chlorophyll is an amazing chemical that is the essential ingredient in photosynthesis.
To turn light into energy. • Because photosynthesis only occurs in plants, why is it essential to animal life? Animals eat plants to make energy; also plants make oxygen as a bi-product of photosynthesis. • What is the role of the light reactions? Include the reactants and the products.
Plants are the producers for an ecosystem. They photosynthesise carbon dioxide and water and produce energy in the form of carbohydrates and other molecules. Photosynthesis requires water, and plants gain water from the soil using mineral ions such as nitrate produced by the nitrifying bacteria. Hydrolysis of ATP releases energy for processes such as active transport of the nitrate ions (and others such as potassium etc) from the soil into root hair cells, a process that lowers water potential and is used to draw water into the plant from the soil. In leaves, photosynthesis involves the photolysis of water, a process that involves the attachment of two electrons to a magnesium ion in chlorophyll and the production of hydrogen ions from the breakdown of water.
These experimental parameters were later abandoned. Identical plantings were conducted again and sunlight levels and predation via caterpillar responses were observed in laboratory conditions alongside controls to study the relationship between both variables and plant growth/survival. Data concluded that sunlight has the largest effect on the fitness of Brassica rapa and higher levels of sunlight coincided with higher levels of growth both horizontally and vertically in plant height, plant width, leaf numbers and leaf are. This research leads a much larger discussion of how plants respond to changing environmental conditions. Introduction: Plants use sunlight to separate water molecules in combination with carbon dioxide to create the sugars it uses to grow and survive and it is therefore highly important in the process of photosynthesis.
Plant Pigments Depending on Photosynthesis. Is the rate of photosynthesis faster when there are extreme light and temperatures present? Paper chromatography is a technique used for separating and identifying pigments. The solvent DPIP, (2, 6-dichlorophenol-indophenol), which is often used to substitute for NADPH, moves up the paper by capillary action. As the solvent moves up the paper, it carries along any substances dissolved in it, which are the pigments.
A test tube containing 0.5g Cu (OH) 2 was heated using a burner. 4. A 1 cm2 piece of zinc ribbon was added to a test tube containing 3 mL of 6M HCl. A lighted splint was inserted into the mouth of the test tube due to gas evolution. 5.
To test tube B add 1ml(1000µm) of Distilled Water. 5. Add 1cm(1000µm) of universal indicator to each test tube. 6. Add 0.1M sodium carbonate solution slowly drop by drop until the contents of each tube are at pH7 (pale green in colour).
Unit 6 Seminar 1.How are these cycles essential for life and what roles do these forms of matter serve for different types of organisms? Ecology is the branch of science that studies interdependent groups of living things, called ecosystems. Each ecosystem is characterized by its physical environment and its community of living organisms. In every ecosystem many different organisms, each competing for matter and energy, occupy their own ecological niches. Photosynthetic plants in the first trophic level use energy from the Sun; these plants provide the energy for animals in higher trophic levels.
An example of an anabolic reaction is photosynthesis where small molecules are built up into larger ones using energy. ATP is built up from ADP and inorganic phosphate ions (3-4 PO, abbreviated to Pi) by condensation and is then hydrolysed by the enzyme ATPase to ADP and Pi to release energy that can be used for energy requiring reactions such as photosynthesis in plants. Plants are able to produce ATP during the light dependent reaction of photosynthesis in the thylakoid of the chloroplast. Red and blue wavelengths of light are absorbed by chlorophyll in chloroplasts on Photosystem II. The chloroplasts are protected and contained by a membrane, but they are close to the surface of the cell to catch the maximum amount of light.