Activity One: 1. The two major variables that affect the rate of diffusion: a. The composition of the lipid bilayer (eg. more cholesterol‚ less permeability to polar substances) b. The structure of the molecule undergoing diffusion (eg. steric conformation‚ size‚ polarity‚ amount and strength of hydrogen bonding) 2. Urea was not able to diffuse through the 20 MWCO because the pores of the membrane were too small for the urea to pass through. The molecular weight of urea is 60.06 g/mol‚ over
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The topic is The Effect of Temperature on the Rate of Dissolving. In this experiment‚ the scientist will research how the temperature of water will affect the rate of dissolving of different chemical solutes. The independent variable in this experiment are the different types of solutes used and the different temperatures the solvent will be adjusted to‚ and the dependent variable is the amount of weight of the solvent after the solute has dissolved in it. The constants are the same cups used to
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well as the H2O2 solution Dependent Variable: Rate of reaction (cm3/second) The gas syringe (± 0.5) is used to measure the amount of oxygen produced from the catalase reaction. A rubber stopper is used to ensure that there is a closed system and no O2 escapes Controlled Variables: Substrate ( H2O2 ) Concentration and Quantity The same pipette will be used to measure
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Metabolic rate refers to the “amount of oxygen consumed by the body cells” (Farlex‚ n.d.). it can be affected by numerous factors‚ some of which being the mass of the animal‚ its physical activity and temperature. Invertebrates are able to live in highly variable conditions due to their metabolism having evolved over time. Homeotherms are animals that are able to maintain a specific body temperature without relying on the temperature from its surroundings. Poikilotherms on the other hand do the exact
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AP Biology Lab Four: Plant Pigments and Photosynthesis Abstract: The purpose of this lab is to separate and identify pigments and other molecules within plant cells by a process called chromatography. We will also be measuring the rate of photosynthesis in isolated chloroplasts. Beta carotene‚ the most abundant carotene in plants‚ is carried along near the solvent front because it is very soluble in the solvent being used and because it forms no hydrogen bonds with cellulose. Xanthophyll is found
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Investigation of the rate of photosynthesis of pondweed. Research question: How does the concentration of sodium bicarbonate relate to the amount of oxygen produced by Elodea (Canadian pond weed) in the process of photosynthesis? Hypothesis: If there is an increase in concentration of sodium bicarbonate the amount of oxygen produced will increase because the sodium bicarbonate concentration will increase the carbon dioxide levels. Independent variable- Concentrations of sodium bicarbonate (8%
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If i increase the intensity of the rate of photosynthesis would drastically increase which is the light bubbles would be emitted in the jar in one minute because of the fact that the more photons of light that fall on a leaf then more chlorophyll molecules would be ionised and the more ATP and NADPH are generated If i increase the intensity of the rate of photosynthesis would drastically increase which is the light bubbles would be emitted in the jar in one minute because of the fact that the more
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light and the rate of photosynthesis and instead it starts relatively high then decreases and increases again. The colour red gives the highest rate of photosynthesis (89 bubbles per minute) with blue giving the second highest rate of photosynthesis (70 bubbles per minute)‚ and yellow giving the third highest rate of photosynthesis (64 bubbles per minute) and green with by far the least (44 bubbles per minute). Although‚ we can see no direct correlation between the rate of photosynthesis and the wavelength
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goldfish’s metabolic process at two different temperatures a chamber and Logger-Lite‚ computer software‚ were used during this lab. However‚ only data from lab section 1F was analyzed for this report. The goal was to determine if the goldfish’s metabolic rates‚ as measured by oxygen consumption‚ will increase when the water temperature is moderately warm. Alternatively‚ the metabolic rates of goldfish‚ as measured by oxygen consumption‚ will not differ between warm and ambient temperatures. Materials and
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Photosynthesis Lab Gizmo website: www.explorelearning.com Class code: EFVNHTVRGY Gizmo Warm-up During photosynthesis‚ plants use the energy of light to produce glucose (C6H12O6) from carbon dioxide (CO2)‚ and water (H2O). Glucose is a simple sugar that plants use for energy and as a building block for larger molecules. A by-product of photosynthesis is oxygen. Plants use some of the oxygen they produce‚ but most of it is released. In the Photosynthesis Lab Gizmo™‚ you
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