Science

Q: Which substance is a monosaccharide? A) cellulose B) glucose C) glycogen D) starch

Q: Cellulose is a polymer consisting of thousands of A) Î±-glucose molecules. B) Î²-glucose molecules. C) long chain fatty acids. D) amino acids.

Q: Lactose, or milk sugar, when hydrolyzed will form ________. A) amylose and glycogen B) cellulose and starch C) glucose and galactose D) fructose and maltose

Q: Sucrose, common table sugar, when hydrolyzed will form ________. A) amylose and glycogen B) cellulose and starch C) glucose and fructose D) lactose and maltose

Q: When crystallized, which form of glucose predominates?C) open chainD) All three are equal in crystals.

Q: In water, which form of glucose predominates?C) open chainD) All three are equal in solution.

Q: What class of compounds are cyclic? A) DNA B) lipids C) monosaccharides D) proteins

Q: The monosaccharide shown below is a(n) A) aldohexose. B) aldopentose. C) ketohexose. D) ketopentose.

Q: Which suffix on a ketone or aldehyde indicates a sugar? A) -ane B) -ene C) -one D) -ose

Q: The term "carbohydrates" refers to a large class of polyhydroxylated ________. A) alcohols and carboxylic acids B) aldehydes and ketones C) amines and amides D) ethers and esters

Q: Hemoglobin is a protein molecule which contains 4 iron atoms. If the mass percent of iron is 0.342%, what is the molar mass of hemoglobin? A) 1020 g/mol B) 16,300 g/mol C) 65,300 g/mol D) none of these

Q: A partial hydrolysis of a protein yielded the following fragments: Ser-Gly, Gly-Ala, Gly-Ala-Val, Val-Leu, Ala-Val. What is the sequence of amino acids in the polypeptide? A) Gly-Leu-Ser-Ala-Val B) Leu-Ala-Gly-Val-Ser C) Ser-Gly-Ala-Val-Leu D) Val-Ala-Gly-Ser-Leu

Q: How many peptide bonds are present in the polypeptide shown below? A) one B) two C) three D) four

Q: Which of the following notations represents the polypeptide shown below? A) Gly-Ala-Ser B) Gly-Val-Thr C) Ser-Ala-Gly D) Thr-Val-Gly

Q: Which of the following notations represents the dipeptide shown below? A) Phe-Thr B) Thr-Phe C) Ser-Tyr D) Tyr-Ser

Q: Which two amino acids form the dipeptide below? A) asparagine and proline B) glycine and cysteine C) serine and alanine D) threonine and valine

Q: How many possible tripeptides can be made with the amino acids: tyrosine, histidine, and cysteine, each used only once? A) 3 B) 4 C) 6 D) 9

Q: In the protein, Asn-Phe-Cys-Lys, which amino acid contains the C-terminal group? A) asparagine B) cysteine C) lysine D) phenylalanine

Q: In the protein, Val-Tyr-His-Pro, which amino acid contains the N-terminal group? A) histidine B) proline C) tyrosine D) valine

Q: Peptide bonds that link amino acids together in proteins contain the ________ functional group. A) amine B) amide C) ester D) ketone

Q: An individual amino acid that makes up a protein polymer is called a ________. A) backbone, B) peptide. C) residue. D) substrate.

Q: All but one of the common amino acids contain a -NH2 amino group. Which one contains an -NH- amino group as part of a ring structure? A) phenylalanine B) proline C) tryptophan D) tyrosine

Q: Which one of the following amino acids contains a hydrophobic side chain? A) leucine B) serine C) threonine D) tyrosine

Q: What does the term "hydrophobic" mean? A) water reactive B) water repelling C) water soluble D) none of these

Q: Which of the following amino acids contains a sulfur in its side chain? A) aspartic acid B) glutamic acid C) methionine D) threonine

Q: Which amino acid has the simplest structure? A) alanine B) glycine C) leucine D) valine

Q: Which one of the amino acids contains a double ring structure? A) phenylalanine B) proline C) tryptophan D) tyrosine

Q: Which of the following amino acids contains a benzyl group? A) glycine B) isoleucine C) methionine D) phenylalanine

Q: Which one of the following amino acids contains a polar side chain? A) alanine B) glycine C) serine D) valine

Q: Which of the following amino acids is acidic? A) alanine B) aspartic C) glycine D) valine

Q: Which one of the following amino acids does not contain a basic side chain A) arginine B) histidine C) lysine D) serine

Q: Which is an amino acid acidic side chain?A) -CH3B) -CH2OHC) -CH2CO2HD) -CH2CH2CH2CH2NH2

Q: Which is an amino acid basic side chain?A) -CH3B) -CH2OHC) -CH2CO2HD) -CH2CH2CH2CH2NH2

Q: Which is an amino acid polar neutral side chain?A) -CH3B) -CH2OHC) -CH2CO2HD) -CH2CH2CH2CH2NH2

Q: Which is an amino acid nonpolar neutral side chain?A) -CH3B) -CH2OHC) -CH2CO2HD) -CH2CH2CH2CH2NH2

Q: What does the term "essential" mean when referring to amino acids? These are the amino acids which A) are necessary for digestion. B) are necessary for respiration. C) are synthesized in our bodies. D) we must obtain from our diet.

Q: How many alpha amino acids commonly make up the different proteins found in humans? A) 4 B) 20 C) 100 D) millions

Q: What does the term "alpha" amino acid mean? A) The amino group attaches to the carbon in the carboxyl group. B) The amino group attaches to the carbon next to the carboxylic acid group. C) The amino acid contains only one carbon atom. D) The amino acid contains only one carboxylic acid group.

Q: A peptide bond links A) an alcohol and a ketone. B) an amide and an aldehyde. C) an amine and a carboxylic acid. D) ATP and acetyl CoA.

Q: In addition to an amine, which functional group do all amino acids contain? A) an alcohol B) an amide C) a carboxylic acid D) an oxyacid

Q: Approximately what mass percent of a body's dry weight consists of proteins? A) 5% B) 25% C) 50% D) 72%

Q: Which molecule is referred to as the "energy storehouse"? A) acetyl CoA B) ATP C) CO2 D) fatty acids

Q: The major final product of the four stages of catabolism is A) acetyl CoA. B) ATP. C) CO2. D) fatty acids.

Q: The reactions that generally release energy that is used to power living organisms are called A) anabolic reactions. B) catabolic reactions. C) metabolic reactions. D) none of these

Q: The sum of the many organic reactions that occur in the cell is called A) anabolism. B) catabolism. C) metabolism. D) none of these

Q: Identify the carboxylic acid and alcohol from which the following ester was made. A) CH3CO2H and CH3CH2OH B) CH3CO2H and CH3CH2CH2OH C) CH3CH2CO2H and CH3CH2OH D) CH3CH2CO2H and CH3CH2CH2OH

Q: Identify the carboxylic acid and alcohol from which the following ester was made. A) CH3CO2H and CH3OH B) CH3CH2CO2H and CH3OH C) CH3CO2H and CH3CH2OH D) CH3CH2CO2H and CH3CH2OH

Q: Identify the functional groups in the following compound. A) alcohol B) alcohol and aldehyde C) alcohol and ketone D) aldehyde and hydroxide

Q: Identify the functional groups in the following compound. A) alcohol and ketone B) alcohol, amine, and ketone C) amine and carboxylic acid D) amine, hydroxide, and ketone

Q: To which family does this organic compound belong? A) amide B) amine C) carboxylic acid D) ester

Q: To which family does this organic compound belong? A) alcohol B) aldehyde C) ether D) ketone

Q: To which family does this organic compound belong? A) alkane B) alkene C) alkyne D) arene

Q: Which are isomers? A) All are isomers. B) (1) and (2); (3) and (4) C) (1) and (3); (2) and (4) D) (1) and (4); (2) and (3)

Q: What is the IUPAC name of the following alkane? A) 2,5-dimethylhexane B) octane C) 1,1,4,4-tetramethylbutane D) 1,1,4-trimethylpentane

Q: What is the IUPAC name of the following alkane? A) decane B) 2, 4-dimethyloctane C) 5, 7-dimethyloctane D) 1, 1, 3-trimethylheptane

Q: Which of the compounds shown above is correctly identified by the name 3, 3-Dimethylpropane? A) all B) none C) only (4) D) only (1) and (4)

Q: Which of the compounds shown above is correctly identified by the name 2, 2-Dimethylpropane? A) all B) none C) only (2) D) only (1), (2), and (4)

Q: Which of the compounds shown above is correctly identified by the name 3-Methylbutane? A) all B) none C) only (4) D) only (1) and (4)

Q: Which of the compounds shown above is correctly identified by the name 2-Methylbutane? A) All are 2-Methylbutane.all B) none C) only (1) D) only (1) and (4)

Q: Which of the compounds shown above is correctly identified by the name pentane according to the IUPAC system of naming compounds? A) all B) none C) only (2) D) only (3)

Q: In the figure above, which are branched hydrocarbons? A) All are branched hydrocarbons. B) None are branched hydrocarbons. C) only (1) and (4) D) only (1), (2), and (4)

Q: In the figure above, which are isomers of compound (1)? A) All are isomers of compound (1). B) None are isomers of compound (1). C) only (2) and (3) D) only (4)

Q: In the figure above, which structures are identical? A) All are identical. B) None are identical. C) only (1) and (4) D) only (1), (3), and (4)

Q: Which of these molecules above have a large partial negative charge (Î´-) on the carbon atom? A) only (1) B) only (3) C) (1) and (3) D) (2) and (4)

Q: Which of these molecules above have a partial positive charge (Î´+) on the carbon atom? A) only (1) B) only (3) C) (1) and (3) D) (2) and (4)

Q: What hybrid orbitals are used by carbon to form covalent bonds with hydrogen? A) sp B) sp2 C) sp3 D) sp3d

Q: What is the H-C-C bond angle? A) 90 B) 109.5 C) 120 D) 180

Q: What hybrid orbitals are used by carbon to form covalent bonds with hydrogen? A) sp B) sp2 C) sp3 D) sp3d

Q: What is the H-C-H bond angle? A) 90 B) 109.5 C) 120 D) 180

Q: What hybrid orbitals are used by carbon to form covalent bonds with hydrogen? A) sp B) sp2 C) sp3 D) sp3d

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