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Chemistry
front 1 1) The structural formulas of amino acids are the same EXCEPT for the A)hydrogen bonding B)alpha carbon C)carboxyl group D)amino group E)side (R) group | back 1 E)side (R) group |
front 2 2) Glycine is the only naturally occurring amino acid that is A)positively charged B)negatively charged C)achiral D)in the L- form E)neutral | back 2 C)achiral |
front 3 3) Hemoglobin is an example of a protein with A)a globular structure B)a primary structure only C)primarily an alpha helix structure D)two protein chains held together E)primarily a beta-pleated sheet structure | back 3 A)a globular structure |
front 4 4) Within hemoglobin, the heme functions as A) a reducing agent B)a disulfide bridge C)one of the four protein subunits D)an oxygen carrier E)an alpha subunit | back 4 D)an oxygen carrier |
front 5  5)Name the following compound A)4-hexanal B)hexanoic acid C)ethyl propyl ether D)ethyl propanoate E)ethyl butanoate | back 5 E)ethyl butanoate |
front 6 6) Which carboxylic acid in the list below is an aromatic carboxylic acid? A)citric acid B)butyric acid C)benzoic acid D)acetic acid E)benzene | back 6 C)benzoic acid |
front 7 7)What is the common name for ethanoic acid? A)citric acid B)acetic acid C)butyric acid D)stearic acid E)formic acid | back 7 B)acetic acid |
front 8  8)What is the IUPAC name for this compound? A)3-methylbutanoic acid B)pentanoic acid C)2-methyl-4-butanoic acid D)y-methylbutanoic acid E)y-methyl butyric acid | back 8 A)3-methylbutanoic acid |
front 9 9)with the correct choice of acid, the product(s) of the acid hydrolysis of N-methylbenzamide could be A)methanol and benzoic acid B)benzoic acid and ethylamine C)formic acid and aniline D)benzoic acid and methylammonium chloride E)formic acid, phenol, and ammonia | back 9 D)benzoic acid and methylammonium chloride |
front 10 10)amides are derivatives of ____ and ____ A)amines; esters B)alkanes;amines C)amines;carboxylic acids D)alcohols; carboxylic acids E)carboxylic acids; alcohols | back 10 C)amines; carboxylic acids |
front 11 11) The reaction of butanoicacids and dimethylamine gives A)N-methylbutanamide B)N-methylbutanamine C)N-ethylbutanamide D)N,N-dimethylbutanamide E)N,N-methylbutanamine | back 11 D)N,N-dimethylbutanamide |
front 12  12)One name for this compound is A)N-ethylacetamide B)ethylpropionamide C)pentanamide D)N-ethylpropanamide E)N,N-diethylacetamide | back 12 D)N-ethylpropanamide |
front 13 13)When acetic acid reacts with ammonia, NH3, the reaction called amidation yields A)ammonium acetate B)ethylammonium C)amino acetate D)acetamide E)acetamine | back 13 D)acetamide |
front 14  14) What is the name of this compound? A)trimethylamine B)ethyldimethylamine C)ethylmethylamine D)ethylmethylnitride E)diethylamine | back 14 B)ethyldimethylamine |
front 15 15) Denaturation of a protein A)can only occur in a protein with quaternary structure B)changes the primary structure of a protein C)hydrolyzes peptide bonds D)is always irreversible E)disrupts the secondary, tertiary, or quarternary structure of a protein | back 15 E)disrupts the secondary, tertiary, or quarternary structure of a protein |
front 16 16) What kinds of interactions are NOT part of tertiary protein structure? A)peptide bonds B)salt bridges C)disulfide bonds D)hydrophobic interactions E)hydrophilic interactions | back 16 A)peptide bonds |
front 17 17)The function of myoglobin is to A)carry vitamins in the blood B)provide strength in cartilage C)carry oxygen in the blood D)support the skeletal muscles E)carry oxygen in the muscle | back 17 E)carry oxygen in the muscle |
front 18 18) Which of the following is an example of a secondary protein structure? A)fatty acid B)amino acid C)trigylceride D)dipeptide E)alpha Helix | back 18 E)alpha Helix |
front 19 19) In the peptide Ala-Try-Gly-Phe, the N-terminal amino acid is A)phenylalanine B)tryptophan C)glycine D)alanine E)aspartic acid | back 19 D)alanine |
front 20 20) A ___ consists of a nitrogen-containing base and a sugar A)pyrimidine B)nucleoside C)base pair D)nucleotide E)complementary base | back 20 B)nucleoside |
front 21 21) The bonds that link the base pairs in the DNA double helix are A)hydrophobic bonds B)ester bonds C)peptide bonds D)hydrogen bonds E)ionic bonds | back 21 D)hydrogen bonds |
front 22 22)When DNA replicates, a guanine forms a base pair with A)guanine-thymine B)adenine-thymine C)adenine-cytosine D)guanine-cytosine E)adenine-cytosine | back 22 D)guanine-cytosine |
front 23 23) In the synthesis of mRNA, an adenine in the DNA pairs with A)adenine B)uracil C)cytosine D)guanine E)thymine | back 23 B)uracil |
front 24 24) Which of the following can NOT be found in a nucleotide of RNA? A)ribose B)purine C)deoxyribose D)pyrimidine E)phosphate | back 24 D)pyrimidine |
front 25 25)which of the following is found in RNA but not in DNA? A)guanine B)deoxyribose C)uracil D)cytosine E)thymine | back 25 C)uracil |
front 26 26) When DNA replicates, a guanine forms a base pair with A)cytosine B)guanine C)uracil D)thymine E)adenine | back 26 A)cytosine |
front 27 27) Which bases "pair" in RNA? Explain or show why they pair. | back 27 Adenine pairs to Uracil (2 H-bonds) and Guanine pairs to Cytosine (3 H-bonds) |
front 28 28) Which bases "pair" in DNA? Explain or show why they pair. | back 28  Adenine pairs to Thymine (2 H-bonds) and Guanine pairs to Cytosine (3 H-bonds) |
front 29 29) Describe how myoglobin and hemoglobin are similar. How are they different. | back 29 Mb:
Hb:
|
front 30 30) Which base is found in DNA but NOT in RNA? | back 30 Thymine |
front 31 31) Explain/define primary structure as it applies to a protein. | back 31  Primary structure sequence of amino acids in a peptide chain |
front 32 32) Explain/define secondary structure as it applies to a protein. | back 32  Secondary structure-alpha helix interaction (H-bonds) between 'N' in amide and C=O of amide |
front 33 33) Explain/define Tertiary structure as it applies to a protein. | back 33  Tertiary structure- folding of alpha helix protein onto itself interaction of 'R' side chains of amino acids
|
front 34 34) Explain/define Quaternary structure as it applies to a protein. | back 34  Quaternary structure-interaction of 2 or more peptide chains to make 1 protein |
front 35 35) Draw a tripeptide (using any amino acids that you want). Label the C terminus, the N terminus, and circle a peptide bond. | back 35  |
front 36 36) Draw a primary structure for either DNA or RNA. Your structure should include 3 Nucleotides. | back 36  phosphate sugar-base phosphate sugar-base phosphate sugar-base |
front 37 37) In the peptide Ser-Cys-Ala-Gly, the C-terminal end is A) Glycerine B) Serotonin C) alanine D) glycine E) serine | back 37 D) glycine |
front 38 38)Acids and bases denature a protein by disrupting A) ionic bonds and hydrophobic interactions B)ionic bonds and hydrogen bonds C)peptide bonds and ionic bonds D)hydrophobic interactions and peptide bonds E)amide bonds and alkene bonds | back 38 B)Ionic bonds and hydrogen bonds |
front 39 39) Hemoglobin has a total of ____ protein chains in its quaternary structure. A) one B) two C) three D) four E) five | back 39 C) four |
front 40 40) The heme in hemoglobin is a(n) A)pleated sheet area in the hemoglobin molecule B)helix area in the hemoglobin molecule C)small molecule within a protein D)protein chain E)oxygen molecule within the hemoglobin molecule | back 40 C) small molecule within a protein |
front 41 41) The alpha helix of the secondary structure of a protein is held together by ____ between two widely separated parts of a protein chain. A)disulfide bridges B)hydrophilic interactions C)hydrophobic interactions D)hydrogen bonds E)salt bridges | back 41 D)hydrogen bonds |
front 42 42) A peptide bond contains which kind of functional group? A) amide B) amine C)ketone D)alcohol E)carboxylic acid | back 42 A)amide |
front 43 43) Heavy metals denature proteins by A) disrupting hydrophobic interactions B) releasing amino acids C) changing the pH of the protein solution D) changing the temperature of the protein solution E)disrupting disulfide bonds | back 43 E) disrupting disulfide bonds |
front 44 44) In a typical amino acid zwitterion, the caroxylate end is A) positively charged B)soluble in a nonpolar solvent C) attached to amine D)negatively charged E)neutral | back 44 D)negatively charged |
front 45 45) Which group of Carbohydrates cannot be hydrolyzed to give smaller molecules? A)monosaccharides B)trisaccharides C)oligosaccharides D)polysaccharides E)disaccharides | back 45 A)monosaccharides |
front 46 46)A monosaccharide that consists of 5 carbon atoms, one of which is in a ketone groupe is classified as a(n) A)aldopentose B)aldotetrose C)aldohexose D)ketopentose E)ketotetrose | back 46 D)ketopentose |
front 47 47) A glycosidic bond between two monosaccharides can also be classified as a(n) A)double bond B)alcohol bond C)ether bond D)achiral bond E)ester bond | back 47 C)ether bond |
front 48 48) which of the following contains alpha-1,6-branches A)amylose B)maltose C)sucrose D)glycogen E)cellulose | back 48 D)glycogen |
front 49 49)under acid hydrolysis conditions, starch is converted to A)galactose B)glucose C)xylose D)fructose E)maltose | back 49 B)glucose |
front 50 50)amino acids that are not synthesized in the body and must be obtained from diet are called A)nonpolar B)polar C)complete D)essential E)incomplete | back 50 E)incomplete |
front 51 51) The following amino acid R group chain is -CHCH3-CH3 A)hydrophilic B)acidic C)basic D)polar E)hydrophobic | back 51 E)hydrophobic |
front 52 52) Amylose is a form of starch which has A)carbon-carbon bonds joining glucose units B)both alpha-1,4-and Beta-1,4-bonds between glucose units C)only alpha-1,4-links bonds glucose units D)hemiacetal links joining glucose units E)only beta-1,4-bonds between glucose units | back 52 C)only alpha-1,4-links bonds glucose units |
front 53 53)In the L-isomer of a Fischer projection of a monosaccharide, the -OH group furthest from the carbonyl is written A)on the right of the bottom chiral carbon B)on the left of the middle chiral carbon C)on the left of the bottom chiral carbon D)on the left of the top chiral carbon E)on the right of the top chiral carbon | back 53 C)on the left of the bottom chiral carbon |
front 54 54)The peptide bonds that combine amino acids in a protein are A)sulfide bonds B)amide bonds C)ester bonds D)ether bonds E)glycosidic bonds | back 54 B)amide bonds |
front 55 55) The bonds that are important in the secondary structure of a protein are A)salt bridges B)hydrogen bonds C)disulfide bonds D)hydrophobic interactions E)peptide bonds | back 55 B)hydrogen bonds |
front 56 56)What kinds of interactions are NOT part of tertiary protein structure? A)hydrophilic interactions B)disulfide bonds C)salt bridges D)peptide bonds E)hydrophobic interactions | back 56 D)peptide bonds |