3. How will the concentration of sucrose in water affect the amount of water that diffuses into or out of the potato cells and thereby change the mass of the potato cells? Hypotheses: 1. If the solution inside the dialysis tubing is hypertonic to the water in the beaker, then the glucose will diffuse out of the bag, and the water will diffuse into the bag, however the starch will remain in the bag. This will occur because the water and glucose are small enough to diffuse out of the pores in the dialysis bag, but the starch molecules are too large to fit through 2.
Various enzymes have unique shape and chemical composition that creates a site, called and active site. This is to allow connection between the enzyme and other molecules called substrates. The shape and chemical makeup of the active site provides an area for part of the substrate to connect with the enzyme. (Farabee, 2010) Part of the active site holds the substrate and part catalyzes the reaction. Some enzymes act on one substrate only, while other enzymes act on a family of related molecules.
Carb-Cutter; Blocker of Carbs or a Phony? Rumor has it that there is a miracle weight loss product that slows down the digestion of carbohydrates. These diet pills contain carb-cutter which blocks amylase, the enzyme that breaks down starch into glucose. With this being done, Carb-Cutter neutralizes the amylase before it starts the breakdown. This allows your body to pass starch through without turning it into glucose.
The phenotype of the peas was also different (smooth, wrinkled), meaning that the biochemical reactions that take place in the peas are different to one another. We know that the presence of the enzyme phosphorylase has something to do with it. According to our results, starch is present in the smooth peas (we know this because of the dark blue-black strain of by the iodine after we added it to powdered smooth peas), therefore we can say that phosphorylase is present in the smooth peas and not (or very little) in the wrinkled peas (because the color of the iodine/Lugol solution did not change color). The reason as to why peas are wrinkled or smooth is rather complicated. The molecular basis of the smooth (alleles: SS or Ss) and wrinkled (alleles: ss) pea seeds involves the gene that codes for the enzyme phosphorylase.
Introduction This report discusses an experiment to asses the chemical breakdown of starch into maltose (sugar) in the presence of the enzyme amylase, a digestive process within the body. Nutrients can be absorbed only when broken down to their monomers (small molecules that breakdown further to other molecules). Enzymes are large protein molecules produced by body cells. “They are biological catalysts, meaning they increase the role of a chemical reaction without themselves becoming part of the product. Digestive enzymes are hydrolytic enzymes.
Milk was extremely high in proteins, and lipids. It showed a negative result for peptides, and starches. Tomato juice tested moderately for peptides and high in lipids, and had negative results for proteins and starches. Ensure showed highly positive for proteins, moderately positive for starches and lipids, and showed a negative result for peptides. Gatorade showed negative results across the chart.
In this case, the most effective factor is the reactant concentration, where the reactant is the enzyme. Enzymes are composed of proteins; therefore their characteristics reflect the properties of proteins which are extremely interesting properties that make enzymes little chemical-reaction machines. The purpose of an enzyme in a cell is to allow the cell to carry out chemical reactions very quickly. These reactions allow the cell to build things or take things apart as needed. This is how a cell grows and reproduces.
Deficiency of the enzyme lactase (common in adult mammals) prevents cleavage of the glycosidic link in lactose during digestion. Instead, anaerobic bacteria in the large intestine ferment this sugar, producing gas, abdominal discomfort and bloating. What gas is formed and what metabolic byproduct(s) also are released into the large intestine? b) Briefly describe the differences between the polysaccharides….. i) amylopectin and glycogen ii) amylose and chitin 2. (10 points) The catabolic cycle called glycolysis is the most universal energy-producing metabolic pathway for organisms that live on or near the earth’s surface.
Enzymes, as a subclass of catalysts, are very specific in nature. Each enzyme can act to catalyze only very select chemical reactions and only with very select substances. An enzyme has been described as a "key" which can "unlock" complex compounds. An enzyme, as the key, must have a certain structure or multi-dimensional shape that matches a specific section of the "substrate" (a substrate is the compound or substance which undergoes the change). Once these two components come together, certain chemical bonds within the substrate molecule change much as a lock is released, and just like the key in this illustration, the enzyme is free to execute its duty once again.
5. Describe how temperature and pH affect sucrase activity. Introduction Enzymes are usually protein molecules that act as biological catalysts. A catalyst greatly increases the speed of a chemical reaction by lowering the activation energy necessary to get the reaction started without itself being altered or consumed. On the surface of the enzyme is an active site that temporarily binds the reactants or substrates forming an enzyme-substrate complex.