ScienceChemistryQuiz 3 example #36098
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Quiz 3

Kailey Washington avatar Kailey Washington
25 July 2022
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question
Which two functional groups are always found in amino acids?
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carboxyl and amino
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The complexity and variety of organic molecules is due to
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the chemical versatility of carbon atoms.
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Organic chemistry is currently defined as
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the study of carbon compounds.
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Stanley Miller's 1953 experiments assumed that early Earth's atmosphere contained
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ammonia, methane, hydrogen gas, and water vapor.
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ow many electron pairs does carbon share in order to complete its valence shell?
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4
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A carbon skeleton is covalently bonded to both an amino group and a carboxyl group. When placed in water it
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function both as acid and base
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Amino acids are acids because they always possess which functional group?
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carboxyl
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Which of the following is true of both starch and cellulose?
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Both polymers of Glucose
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On food packages, to what does the term insoluble fiber refer?
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Cellulose
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If cells are grown in a medium containing radioactive 15N, which of these molecules will be labeled?
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both proteins and nucleic acids
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Which of the following statements best summarizes the differences between DNA and RNA?
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DNA nucleotides contain a different sugar than RNA nucleotides.
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Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?
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5'-ATGC-3' with 5'-GCAT-3'
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If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence
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5'TGCAAT3'.
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Which modifications of fatty acids will best keep triglycerides solid at warmer temperatures?
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adding hydrogens and trans double bonds to the fatty acids
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Which of these molecules is not formed by dehydration reactions?
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fatty acids
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Changing a single amino acid in a protein consisting of 325 amino acids would
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always alter the primary structure of the protein, sometimes alter the tertiary structure of the protein, and affect its biological activity.