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Since enzymes have a specific active site, then a specific substrate binds on to it. The product that forms from the substrate have still the same shape in the active site. In other words there shaped is not altered, only the substrate is either broken apart or made into one. However the shape of the substrate/s is still the same. hence the subsrate/s can rejoin to the active site and thus the reverse reaction can occur.
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∙ 12y ago
Lily
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You've discovered an enzyme that can catalyze two different chemical reactions Which of the following is most likely to be correct?
Either the enzyme has two distinct active sites, or the reactants involved in the two reactions are very similar in size and shape
What enzyme is necessary for the dark reactions?
Rubisco is the key enzyme for the dark reactions, also know as the Calvin Cycle. It is thought to be the most abundant protein on Earth.
Why do enzyme molecules change shape at high temperatures?
The rate of enzyme reactions is affected by temperature. All enzymes have an optimum temperature range in which they work most efficiently. An enzyme is most active at its optimum temperature. A temperature rise beyond this point reduces enzyme activity till it completely stops. This happens because the enzymes structure has changed, (often a loss of the correct folding of the molecule) and it's irreversiable. The change of the structe makes the enzyme become useless because it can't bind to subrates to make chemical reactions.
How do enzymes effect biochemical reactions?
Enzymes catalyze biochemical reactions by creating enough product that it eventually becomes an inhibitor to the enzyme and will essentially control the rate of reaction with the amount of product produced.
Is the non protein part of an enzyme will attach with enzyme after making product?
Enzymes are proteins that catalyze (i.e., increase the rates of) chemical reactions.[1][2] In enzymatic reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts them into different molecules, called the products. Almost all processes in a biological cell need enzymes to occur at significant rates. Since enzymes are selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines which metabolic pathways occur in that cell.Like all catalysts, enzymes work by lowering the activation energy (Ea‡) for a reaction, thus dramatically increasing the rate of the reaction. Most enzyme reaction rates are millions of times faster than those of comparable un-catalyzed reactions. As with all catalysts, enzymes are not consumed by the reactions they catalyze, nor do they alter the equilibrium of these reactions. However, enzymes do differ from most other catalysts by being much more specific. Enzymes are known to catalyze about 4,000 biochemical reactions.[3] A few RNA molecules called ribozymes also catalyze reactions, with an important example being some parts of the ribosome.[4][5] Synthetic molecules called artificial enzymes also display enzyme-like catalysis.[6]Enzyme activity can be affected by other molecules. Inhibitors are molecules that decrease enzyme activity; activators are molecules that increase activity. Many drugs and poisons are enzyme inhibitors. Activity is also affected by temperature, chemical environment (e.g., pH), and the concentration of substrate. Some enzymes are used commercially, for example, in the synthesis of antibiotics. In addition, some household products use enzymes to speed up biochemical reactions (e.g., enzymes in biological washing powders break down protein or fat stains on clothes; enzymes in meat tenderizers break down proteins, making the meat easier to chew).
What is true about most enzyme assisted reactions?
They occur more quickly than reactions without enzymes.They occur more quickly than reactions without enzymes.
Can acid base reactions be reversible?
can the reaction between alkali and acid be reversed
In what kind of reaction can the products form the reactants?
The type reaction that changes the reactants into products is called a chemical reaction. Most chemical reactions can run forward or backward.
How can chemical change be reserved?
Reversible changes are the chemical reactions that can be reversed, however most are non reversible. The ones that can be reversed is because the reaction can flow both ways.
Do all enzymes perform optimally at the pH 7?
An enzyme's optimum pH is the pH (that is, degree of acidity of alkalinity) that the enzyme catalyses reactions fastest at. If the pH varies too much from the optimum, the enzyme becomes denatured and cannot catalyse reactions any more.
You've discovered an enzyme that can catalyze two different chemical reactions Which of the following is most likely to be correct?
Either the enzyme has two distinct active sites, or the reactants involved in the two reactions are very similar in size and shape
What is required in most of the Chemical reactions involved in metabolism?
A protein enzyme so that it will occur at body temperature.
Why do you need more then 1 type of enzyme?
Enzymes are highly specific. Each enzyme catalyzes a particular chemical reaction or at most a family of closely related chemical reactions.
Is making crisps from cooking oil and potatoes a reversible change or chemical reaction?
Most cooking processes are chemical reactions. Generally, the reactions are non reversible and once cooked, food cannot be returned to an uncooked state. So, frying potatoes causes a non reversible chemical reaction. The question is not as precise as it might be. Changes can be physical or chemical. They can also be reversible or non reversible but it is important to note that many chemical changes are reversible just as many physical changes are reversible.
Would legalizing assisted suicide lead to euthanasia?
It might in a very few cases, but it's not an either/or thing, as with most human reactions.
Does tight binding between enzyme and its substrate imply rapid catalysis?
All catalysts, enzyme work via the lowering of the activation energy for a reaction this causes the rate of the reaction to increase dramatically. Should be noted that most enzyme with tight binding reactions rates are millions of times faster than those of of catalyst similar reactions. causing rapid catalysis
What would happen if most biochemical reactions are catalyzed by the same enzyme?
If an enzyme produces too much of one substance in the organism, that substance may act as an inhibitor for the enzyme at the beginning of the pathway that produces it, causing production of the substance to slow down or stop when there is sufficient amount.
