Review Questions Exam 2 Although I try to cover all materials thoroughly in these questions‚ anything covered in lecture may appear on the exam. Membrane Transport 1. Describe the cell permeability and membrane transport. What can enter/exit the cell on its own? What requires assistance? Why? 2. Describe membrane potential. What is it? How is it established? How does it influence the transport of charged molecules? What are the components of the electrochemical gradient?
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Introduction Plants are some of the most important organisms on earth. They perform a multitude of services that keep ecosystem functioning. Plants provide us with food‚ medicine‚ and they perform photosynthesis which converts carbon dioxide into oxygen and in so doing remove carbon dioxide from the atmosphere‚ provide us with many everyday products and are very beautiful to look at. (Morgan 2009) Plants provide us with energy through food Food provides humans with energy that allows us to
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A. Fermentation Lab- The basic process Prepared 3 beakers with contents listed below. ( a. Beaker 1: glucose only b. Beaker 2: Starch only c. Beaker 3: Starch + amylase). Poured contents of each beaker into its respective fermentation tube‚ ensuring the tail portion of the tube was filled with liquid. Placed tubes in an incubator at 37 degrees‚ measuring distance between tip of tube tail to fluid level at 20‚ 40‚ and 60 minute intervals. Calculated gas volume using this distance along with radius
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E5 & E6 Extraction of Chlorophyll from Fresh Spinach and Investigation of the Photochemistry of Chlorophyll Chlorophyll a Chlorophyll b E5 - Extraction of Chlorophyll from Fresh Spinach E6 - Investigation of the Photochemistry of Chlorophyll The aim of this experiment is to investigate the photochemistry of chlorophyll. This experiment will be performed in two lab periods. In the first lab period you will extract chlorophyll‚ the green pigment in leaves‚ from spinach.
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In 1905‚ Frederick Blackman‚ a British physiologist‚ concluded that photosynthesis‚ the capture of light and conversion of it into chemical energy is a two-way process‚ of which only one uses direct light to trap radiant energy. In the Hill Reaction activity‚ our group will be focusing directly on the light dependent reaction. The overall purpose of this experiment is to try to prove the hypothesis that this reaction does produce compounds that have the energy of light. The first of the two major
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Abstract Stomata is important to plants because of their role in gas exchange and photosynthesis. Clear nail polish and clear plastic tape were used to make leaf impressions of A. floridanum. Once impressions were completed‚ compound microscopes were used to count the total number of stomata per slide. The counts of stomata were used to find stomatal densities‚ along with the open/closed ratios of stomata. Stomatal density and open/close ratio of stomata did not differ between the two locations
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Holozoic nutrition (Gr. holo means-whole ; zoikos means-of animals) is a method of nutrition that involves the ingestion of liquid or solid organic material‚ digestion‚ absorption and assimilation of it to utilize it. It includes taking in the complex substances and converting them into simpler forms. Example‚ proteins can be broken into amino acids. This method suggests phagocytosis where the cell membrane completely surrounds a food particle[pic] Parasitic Nutrition is a mode of heterotrophic nutrition
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different forms but no more may be added. So that these don’t run out they are cycles so they may be reused. Photosynthesis and respiration are the reverse of each other‚ and you couldn’t have one without the other. Carbon is an essential component of all organic substances‚ necessary in nucleic acids‚ proteins‚ carbohydrates. The only way that can enter ecosystems is when it’s used for photosynthesis. Carbon dioxide diffuses into the plants stomata and through the Calvin cycle is combined with other
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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
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Introduction and Background: Photosynthesis is the process in which light energy is converted to chemical energy‚ and allows plants to grow‚ flower and produce seed. The process of photosynthesis requires an organelle called chloroplast and a pigment called chlorophyll The energy of the light is absorbed by chlorophyll and in turn supplies the plant with energy to transform carbon dioxide and water into oxygen and carbohydrates. (lab handout). The process of photosynthesis requires an organelle called
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