Enzymes Some chemical reactions simply happen when the two reactants come into contact. This reaction is spontaneous because it does not require outside energy to force it to occur. Most reactions, however, require energy. For example, the chemical reactions that produce a cake do not take place when baking soda, flour, and the other ingredients of a cake are simply left in a pan on the kitchen counter.
Figure of enzymes meeting a substrate and forming a new product peptide bond Enzymes: What explains this difference in speed? What do our cells have, that a test-tube lacks? They Enzyme lab quiz the conditions needed for biochemical reactions to happen fast. The definition of catalysis Consider a chemical reaction where a molecule A bonds with a molecule B to create a molecule A-B A stuck to B.
Under a given set of conditions the temperature the reaction occurs at, the pressure of the atmosphere, and the concentrations of the reactants A and B and the product A-B this reaction happens at a certain speed.
For example, 3 A molecules and 3 B molecules become 3 A-B molecules each second. Figure of unbonded molecules forming bonds To call something a catalyst for this reaction, two criteria have to be met: Figure of unbonded molecules using an enzyme catalyst to form bonds This second part of the catalyst definition is very important.
If we imagine starting a camp-fire, which is essentially a chemical reaction between wood and oxygen, we could certainly speed the reaction up by dumping a huge bucket of Enzyme lab quiz on the fire.
The gasoline makes the reaction go faster as indicated by the charred eyebrows and singed hair of anybody trying this at home but it also gets used up. In other words, gasoline on a fire is not a catalyst. One of the best everyday examples of a catalyst is the emissions control system in your car.
The main part of this system, unsurprisingly, is called a catalytic converter. This device is a container with a series of small screens coated in precious metals platinum, rhodium, etc. These metals are catalysts for the conversion of nitric oxide a nitrogen atom bonded to an oxygen atom into nitrogen and oxygen.
Figure of a catalytic converter How do catalysts work? Most catalysts including enzymes work the same basic way, because most chemical reactions including biochemical ones work the same basic way.
As a good basic example, lets look at the nitric oxide reaction from the last section. What you have is the collision of two molecules of nitric oxide that results in the breakage of nitrogen-oxygen bonds and the creation of new nitrogen-nitrogen and oxygen-oxygen bonds. Figure showing two molecules of nitric oxide gas colliding to form a molecule of nitrogen gas and a molecule of oxygen gas If we were to dump a whole bunch of nitric oxide molecules into a normal jar with no catalytic converterand we were able to get an extreme close-up of what was going on at the molecular level, we would see millions of N-O molecules spinning and tumbling in space, smashing into each other and ricocheting off the walls of the jar at incredible speeds.
Very, very few nitrogen or oxygen molecules would be created, whereas most ofthe nitric oxide molecules would just bounce off of each other. Why the nitric oxide molecules bounce off each other: You also know that if you try and align one pole of a magnet with the same pole of the other, the magnets will repel.
Nitrogen and oxygen atoms are like magnets in this sense. Figure showing magnets attracting and repelling and a figure a nitrogen and oxygen atom attracting and repelling.
The first rule is that there is a mutual attraction between red magnets and blue magnets. This means that if you stick the north pole of a red magnet to the south pole of a blue magnet, they will stick together, just like you would expect with two magnets. The second rule is that there is a stronger mutual attraction between magnets of the same color: What this means is that a red magnet will prefer to stick to another red magnet, and a blue magnet will prefer to stick to another blue magnet, if given the choice.Before a practice quiz begins you will be told the total number of questions which are available within the quiz.
You can then specify the number of questions you wish to do in a practice quiz. The quizzer will automatically take a random grouping of questions and then present those questions to you. Acids and Bases Are Everywhere Every liquid you see will probably have either acidic or basic traits.
Water (H 2 O) can be both an acid and a base, depending on how you look at it. It can be considered an acid in some reactions and a base in others. Water can even react with itself to form acids and bases.
Enzyme Activity Lab By: Chase, Brian, Walter, and Nick The General Questions: 1. Balanced Equation: 2 H2O>2 H2O + O2 2. Enzyme: Catalase 3. Catalase is found in highest concentration within the liver in the human body. Catalase breaks down H into water and oxygen.
It allows the liver to filter. Macromolecules. DIRECTIONS: Click the button to the left of the SINGLE BEST answer. You may reset all the answers by pressing the RESET button. Click the Grade it! button when you are finished.
LabBench Activity Enzyme Catalysis. by Theresa Knapp Holtzclaw. Introduction. Enzymes catalyze reactions by lowering the activation energy necessary for a reaction to occur. The Enzyme Game Purposes of game: To reinforce information learned about the function of enzymes (breaking down substances into their individual parts), to learn about 8 specific enzymes, to reinforce the fact that enzymes can only work at.