So I began to think. It links together the sympathetic and parasympathetic nervous system, with the actions of the stress hormones, the adrenal glands, thyroxine, glucagon, insulin etc.
Hire Writer Catalase is a common enzyme found in nearly all living organisms exposed to oxygen that catalyzes the decomposition of hydrogen peroxide to water and oxygen. It is one of the fastest acting enzymes it needs to maintain low levels of hydrogen peroxide. It is a very important enzyme in reproductive reactions.
Likewise, catalase has one of the highest turnover numbers of all enzymes; one catalase molecule can convert millions of molecules of Potato catalyst lab essay peroxide to water and oxygen each second.
Reaction catalysed by catalase: This heme has to be drawn then as radical cation. As hydrogen peroxide enters the active site, it interacts with the amino acids Asn asparagine at position and His74, causing a proton hydrogen ion to transfer between the oxygen atoms.
Catalase is a tetramer of four polypeptide chains, each over amino acids long.
It contains four porphyrin heme iron groups that allow the enzyme to react with the hydrogen peroxide. The optimum pH for human catalase is approximately 7, and has a fairly broad maximum the rate of reaction does not change appreciably at pHs between 6. The pH optimum for other catalases varies between 4 and 11 depending on the species.
The optimum temperature also varies by species. Catalase is usually located in a cellular, bipolar environment organelle called the peroxisome. Peroxisomes, which get their name from peroxide and hydrogen, are spherical, 0.
The factors affecting rate of decomposition are temperature, pH and changes, concentration of hydrogen peroxide and concentration of catalase. As this investigation investigates the effect of concentration of catalase on the rate of decomposition of hydrogen peroxide, the temperature, pH and concentration of hydrogen peroxide are kept constant throughout the experiment.
Hypothesis Based on the background information, I hypothesize that the general trend will be such that as the concentration of catalase increases due to the number of potato discs increasing, the rate of decomposition of hydrogen peroxide will also increase and this is translated into the mean air pressure measured to be increasing.
However, the hypothesized graph will have a concave down as seen in figure 2.
This is because as the concentration of catalase increases, more enzyme-substrate complexes will be formed and there will be fewer hydrogen peroxide molecules that are free, thus causing the rate of reaction to increase at a slower rate.
It will reach a point whereby all the hydrogen peroxide molecules are being decomposed such that even as the concentration of catalase increases, the rate of reaction will not increase. Concentration of catalase will no longer become a limiting factor but instead, concentration of hydrogen peroxide solution becomes a limiting factor.
Rate of reaction can now only increase if concentration of hydrogen peroxide solution increases. How to cite this page Choose cite format:Catalase is a tetramer of four polypeptide chains, each over amino acids long.
It contains four porphyrin heme (iron) groups that allow the enzyme to react with the hydrogen peroxide. The optimum pH for human catalase is approximately 7, and has a fairly broad maximum (the rate of reaction does not change appreciably at pHs between and ).
Potato Catalase Lab Essay - Words - r-bridal.com r-bridal.com Grade 12 Biology (SBI 4U1) Nicole Mikulis Unit: Biochemistry Sept 14 Lab: Effect of temperature and pH on catalase activity BACKGROUND Catalase is an enzyme that detoxifies chemicals that might harm the cell such as hydrogen peroxide (H2O2).
On’a’lined’pieceof’paper,’writea’conclusionfor’the3lab.’Summarize’your’findings’and’analysis.’’’ *Everyonemust. Catalase is an enzyme found in food such as potato and liver. It is used for removing Hydrogen Peroxide from the cells which is the poisonous by-product of metabolism. Catalase speeds up the decomposition of Hydrogen Peroxide into water and oxygen as shown in the equations below.
This is an example of an investigation with catalase and potato. Potato Enzyme Lab. INTRODUCTION An enzyme is a protein that speeds up or slows down a specific chemical reaction in an organism. Potato Catalyst Lab Essay Sample. Background Information: An enzyme is catalytic protein.
It is the most important type of molecule found in living cells. Cells would not be able to function without enzymes. Enzymes speed up or slow down chemical reactions of the cells.
It is usually easy to identify the names of enzymes because they end in -ase.