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A nucleotide is an organic molecule containing an amine group and a carboxylic acid group.

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Which of the following tripeptides could not be formed by a combination of glycine, cysteine, and isoleucine.


A) Gly-Cys-Ile
B) Gly-Ile-Cys
C) Ile-Gly-Cys
D) Cys-Ile-Gly
E) All of these are possible.

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The following molecule is formed by two amino acids: Identify the alpha carbons (using the numbers as shown) and the side chains for each amino acid in the molecule. The following molecule is formed by two amino acids: Identify the alpha carbons (using the numbers as shown) and the side chains for each amino acid in the molecule. A) 2, 4; CH<sub>3</sub>, CH<sub>2</sub>SH B) 1, 6; CHNH<sub>2</sub>, SH C) 2, 3; CH<sub>3</sub>, CO D) 2, 4; NH<sub>2</sub>, CO<sub>2</sub>H E) 2, 6; CH<sub>3</sub>, SH


A) 2, 4; CH3, CH2SH
B) 1, 6; CHNH2, SH
C) 2, 3; CH3, CO
D) 2, 4; NH2, CO2H
E) 2, 6; CH3, SH

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Examine the following model of a portion of a carbohydrate and classify the molecule. Examine the following model of a portion of a carbohydrate and classify the molecule. A) monosaccharide B) disaccharide C) polysaccharide D) pentose E) sucrose


A) monosaccharide
B) disaccharide
C) polysaccharide
D) pentose
E) sucrose

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Which of the following is not a base found in DNA?


A) Which of the following is not a base found in DNA? A) B) C) D) E)
B) Which of the following is not a base found in DNA? A) B) C) D) E)
C) Which of the following is not a base found in DNA? A) B) C) D) E)
D) Which of the following is not a base found in DNA? A) B) C) D) E)
E) Which of the following is not a base found in DNA? A) B) C) D) E)

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Glucose is a hexose sugar with the formula C6H12O6.Which of the following is β\beta -glucose?


A) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \beta -glucose? A) B) C) D) E)
B) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \beta -glucose? A) B) C) D) E)
C) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \beta -glucose? A) B) C) D) E)
D) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \beta -glucose? A) B) C) D) E)
E) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \beta -glucose? A) B) C) D) E)

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_____ is one of a class of organic polymers making up most body tissue that is characterized by the presence of peptide bonds and formed by the polymerization of amino acids.


A) A dipeptide
B) A tripeptide
C) A protein
D) DNA
E) A carbohydrate

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Glucose is a hexose sugar with the formula C6H12O6.Which of the following is α\alpha -glucose?


A) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \alpha -glucose? A) B) C) D) E)
B) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \alpha -glucose? A) B) C) D) E)
C) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \alpha -glucose? A) B) C) D) E)
D) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \alpha -glucose? A) B) C) D) E)
E) Glucose is a hexose sugar with the formula C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>.Which of the following is \alpha -glucose? A) B) C) D) E)

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A portion of a DNA strand has the following base sequence: GACTAACCTT What is the corresponding base sequence in mRNA transcribed from this DNA?


A) CUGAUUGGAA
B) CTGATTGGAA
C) CTGUTTGGAA
D) CTUATTUUAA
E) GACTAACCTT

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Which type of protein structure results from the association in a protein of two or more polypeptide chains?


A) primary
B) secondary
C) tertiary
D) quaternary
E) globular

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How many different amino acids are obtained by hydrolyzing all the peptide bonds in the following polypeptide? How many different amino acids are obtained by hydrolyzing all the peptide bonds in the following polypeptide? A) 0 B) 1 C) 2 D) 3 E) 4


A) 0
B) 1
C) 2
D) 3
E) 4

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The following peptide is formed from two amino acids: Which of the following correctly identifies the peptide bond as indicated by the circled bond? The following peptide is formed from two amino acids: Which of the following correctly identifies the peptide bond as indicated by the circled bond? A) A B) B C) C D) D E) E The following peptide is formed from two amino acids: Which of the following correctly identifies the peptide bond as indicated by the circled bond? A) A B) B C) C D) D E) E


A) A
B) B
C) C
D) D
E) E

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Which of the following best describes this molecule? Which of the following best describes this molecule? A) saturated fatty acid B) cis unsaturated fatty acid C) trans unsaturated fatty acid D) nucleic acid E) protein


A) saturated fatty acid
B) cis unsaturated fatty acid
C) trans unsaturated fatty acid
D) nucleic acid
E) protein

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RNA is a high-molar-mass nucleic acid that stores genetic information and has a double helix structure.

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A triglyceride contains the following fatty acid.Is this triglyceride a solid fat or a liquid oil? Is it saturated or unsaturated? Does it contain cis or trans arrangements at the double bonds? A triglyceride contains the following fatty acid.Is this triglyceride a solid fat or a liquid oil? Is it saturated or unsaturated? Does it contain cis or trans arrangements at the double bonds? A) liquid oil, saturated, trans B) liquid oil, saturated, cis C) liquid oil, unsaturated, cis and trans D) solid fat, saturated, cis E) solid fat, unsaturated, trans


A) liquid oil, saturated, trans
B) liquid oil, saturated, cis
C) liquid oil, unsaturated, cis and trans
D) solid fat, saturated, cis
E) solid fat, unsaturated, trans

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If the base sequence in a portion of a strand of DNA is ACTAAGATC, what is the base sequence in the strand of mRNA transcribed from this DNA?


A) ACTAAGATC
B) TUATTCTAU
C) UGAUUCUAG
D) TGUTTCTUG
E) TGATTCTAG

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Which of the amino acids is a building block for proteins?


A) Which of the amino acids is a building block for proteins? A) B) C) D) E)
B) Which of the amino acids is a building block for proteins? A) B) C) D) E)
C) Which of the amino acids is a building block for proteins? A) B) C) D) E)
D) Which of the amino acids is a building block for proteins? A) B) C) D) E)
E) Which of the amino acids is a building block for proteins? A) B) C) D) E)

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Examine the following model of a carbohydrate and classify the molecule. Examine the following model of a carbohydrate and classify the molecule. A) monosaccharide B) disaccharide C) polysaccharide D) glycogen E) cellulose


A) monosaccharide
B) disaccharide
C) polysaccharide
D) glycogen
E) cellulose

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What is a high-molar-mass nucleic acid that stores genetic information and has a double helix structure?


A) tRNA
B) mRNA
C) DNA
D) dRNA
E) cytoplasm

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A portion of one strand in a DNA molecule has the following sequence of bases: ATATCGTCCGAA Identify the sequence of bases in the other strand of the DNA molecule that would hydrogen bond to these bases.


A) TGTGCAGCCATT
B) CGCGATGAATCC
C) ATATCGTCCGAA
D) TATAGCAGGCTT
E) GCGCTACTTAGG

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