Biology question and answers for December 26, 2023
- Q Which enzyme works best in a low pH environment with a temperature of approximately 370 C?amylasetrypsinlipasepepsincatalase
- Q Macromolecules and EnzymesWhat is the "lock-and-key" model of enzyme-substrate interaction?
- Q Which of the following is a reagent commonly used to detect starches?pancreatinalbuminbrown paperiodine-potassium-iodideBiuret reagent
- Q What does denaturation do to an enzyme?It allows for water production.It increases the activation energy.It changes the shape of the active site.It speeds up catalysisIt speeds up the reaction.
- Q What does an enzyme do?It reduces activation energy.It reduces reaction rate.It increases activation energy.It changes the shape of the catalyst.It slows the break down of reactants.
- Q Which of the following is found in all animo acids?carbonhydrogenoxygennitrogenall of them
- Q What is the "induced fit" model of enzyme-substrate interaction?
- Q Earlier in the year, you learned about denaturing as it relates to one category of macro-molecules. In which of the following does denaturing occur when the temperature or plchanges drastically?A...
- Q Catalysts that act in cellular reactions are known as _____ They are usually ______ but can be composed of RNA. Enzymes fit specific _____ they do not interact with _____...
- Q Monosaccharides can exist aslinesringslines and rings
- Q is the lac operon likely to be expressed when glucose and lactose are both absent? Explain your answer by describing what is happening to the operon under this condition.
- Q A lipid fat molecule consists of two parts-glycerol and fatty acids. Glycerol is an compound with carbons, hydrogens, and three hydroxyl ( three ) groups. Fatty acids have a long...
- Q Why are lipids hydrophobic?Their carbon to carbon bonds are polar, so they attract water.Their carbon to carbon bonds are non-polar, so they repel water.Their carbon to carbon bonds are polar,...
- Q Avdenine and thymine are paired with one another across a DNA's double helix.TrueFalse
- Q DNA does not have histone proteins.TrueFalse
- Q The macromolecule you are studying as non-glycosidic, non-polar bonds. It is most likely anucleic acidlipidproteincarbohydrate
- Q Choose all of the following that are functions of proteins.They regulate movement of ions and other substances into and out of a cell.They allow muscles to move by contracting against...
- Q The orientation of monomers in a larger molecule can make it stronger or weaker.TrueFalse
- Q The molecule you are studying contains many glycosidic bonds. There is most likelya monosaccharide, like glucosea disacchride, like lactosea disaccharide, like galactosea polysaccharide, like starch
- Q The individual sugar molecules in a carbohydrate are bound together with ionically.TrueFalse
- Q Monosaccharides (mono- = "; sacchar- = number of carbons usually ranges from ") are simple sugars, the most common of which is In monosaccharides, the
- Q Disaccharides are formed by hydration reactions.TrueFalse
- Q According to the stoichiometric formula for carbohydrates, if a carb has 4 carbons, how many hydogrens should be it?So, n =4: (CH,O)n0248
- Q Select the correct statement about isotopes.Isotopes of the same element have the same atomic number but differ in their atomic masses.All the isotopes of an element have the same number...
- Q A Lpid fat molecule consists of two parts-glycerol and fatty acids. Glycerol is an hydrogens, and three hydroxyl ( compound with groups. Fatty acids have a long chain of hydrocarbons...
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