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ap chap 2
chapter 2 chemistry
| Question | Answer |
|---|---|
| amino acids joining together to make a peptide is a good example of an ___reaction | synthesis |
| an example of a coenzyme is___. | riboflavin |
| select the most correct statment regarding nucleic acids | dna is a long double stranded molecule made up of A,T,G, C bases |
| the four elements that make up about 96% of body matter are___ | carbou, oxygen, hydrogen, nitrogen |
| the single most abundant protein in the body is | collagen |
| which of the following is not true of proteins? | they appear to be the molecular carriers of the coded hereditary information |
| carbohydrates and proteins are built up from thier basic building blocksby the ___. | removal of a water moleculre between each two units |
| in general the lipids that we refer to as oils have___ | a high degree of unsaturated bonds |
| cabohydrates are stored in the liver nad muscles in the form of___. | glycogen |
| select which reactions will usually be irreversible regarding chemical equilibrium in living systems | glucose to co2 and h2o |
| which protein types are vitally iportant to cell function in all types of sressful circumstances | molecular chaperones |
| the numbers listed represent the number of electrons in the first, second, and third energy levels respectively. on this basis which of the following is an unstable or reactive atom | 2, 8, 1 |
| which of the following is the major positive ion outside cells? | sodium |
| what happens in redox reactions? | both decompostion and electron exchange occur |
| which of the following describes coenzymes? | organic molecules derived from vitamins |
| select the statment about mixtures that is correct | a solution contains solvent in large amounts an dsolute in smaller quantities |
| which of the following is an example of a suspension | blood |
| what is a chain of 25 amino acids called? | polypeptide |
| which of the following is a neutralization reaction | HCL+NaOh-NaCL+H2O |
| which of the following is not a role of molecular chaperonins? | act as a biological catalyst |
| which of the following constitues a long chain of simple sugars | polysaccharide |
| a chemical reaction in which bonds are broken is usually associated with | the release of energy |
| which of the following would be regarded as an organic molecule | CH4 |
| if atom x has an atomic number of 74 it would have which of the following | 37 protons and 37 electrons |
| choose the answer that best descibes fibrous proteins | are very stable and insoluble in water |
| which of the following is not considered a factor in influencing a reaction | time |
| choose the answer that best describes HCO3- | a biocarbonate ion |
| choose the statment that is false or incorrect | a key feature of the bodys metabolism is the almost exclusive use of exergonic reactions by the body |
| what is a dipole | a polar molecule |
| the genetic information is coded in dna by the | sequence of the nucleotides |
| heat shock prteins are a type of protein called___ | chaperonins |
| two good examples of a colloid would be jello and ___ | cytosol |
| a solution that has a ph of 2 could best be described as being ___ | acidic |
| what is the ratio of fatty acids to glycerol in neutral fats | 3:1 |
| select the correct statment about isotopes | isotopes of the same element have the same atomic number but differ in theri atomic masses |
| which of the following is not an electrolyte | h2o |
| in liquid xyz you notice that light is scattered as it passes through. there is no precipitant in the bottom of the beaker thoug hti has been sitting for several days. what type of liquid is this | colloid |
| which fo the following is true regarding the concentration of solutions | molarity is one mole of solute per 1000ml of solution |
| which of the following statments if false | larger partilcles move faster than smaller ones and thus collide more frequently and more forcefully |
| the cheical symbol o=o means___ | the atoms are double bonded |
| which of the following elements is necessary for proper conduction of nervous impulses | NA |
| what does CH4 mean | there is one carbon and four hydrogen atoms |
| which statment about enzymes is false | enzymes raise the activation energy needed to start a reaction |
| atom x has 17 protons how many electrons are in its valence shell? | 7 |
| what does the formula C6H12o6 mean | there are 12 hydrogen, 6 carbon and 6oxygen atoms |
| which bonds often bind different parts of a molecule into specific three dimensional shape? | hydrogen |
| sucrose is a | diasaccharide |
| which porperty of water is demonstrated when we sweat | high heat of vaporization |
| ____is fat soluble, produced in the skin on exposure to uv radiation and necessary for normal bone growth and function | vitamin d |
| in a dna molecule the phosphate serves | to hold the molecular backbone together |
| what level of protein synthesis is represented by the coiling ofthe protein chain backbone into an alpha helix | secondary structure |
| which of the following does not describe the ATP molecule | pigments |
| salts are always | ionic compounds |
| an atom with a valence of 3 may have a total of ___ electrons. | 13 |
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