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Please read the following scenario to answer the following questions. While working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of individual nucleotides in DNA. Subsequently, the researcher isolated and cultured a single cell from this group and noticed that the progeny of this cell were not producing a certain protein and that this affected their survival. -The mutation that resulted from the accident was probably ________.


A) an amino acid substitution
B) one that changed the triplet grouping of the genetic message
C) an error in translation
D) a loss in regulation of gene expression

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Which of the following enzymes is responsible for RNA synthesis?


A) DNA polymerase
B) ribosome
C) reverse transcriptase
D) RNA polymerase

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Peptide bonds form between ________.


A) amino acids
B) an mRNA codon and a tRNA anticodon
C) a tRNA and the amino acid it is carrying
D) an mRNA transcript and the small ribosomal subunit

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Examine the genetic code table shown below.The codon AGC codes for the amino acid ________. Examine the genetic code table shown below.The codon AGC codes for the amino acid ________.   A)  serine B)  arginine C)  threonine D)  alanine


A) serine
B) arginine
C) threonine
D) alanine

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DNA and RNA are polymers composed of ________ monomers.


A) nucleotide
B) carbohydrate
C) fatty acid
D) amino acid

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A(n) ________ is to bacteria as a ________ is to animal cells.


A) retrovirus... virus
B) phage... prophage
C) prophage... provirus
D) RNA virus... DNA virus

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If one strand of a DNA double helix has the sequence GTCCAT,what is the sequence of the other strand?


A) ACTTGC
B) TGAACG
C) CAGGTA
D) CAGGUA

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In a DNA double helix,adenine pairs with ________ and guanine pairs with ________.


A) cytosine... thymine
B) guanine... adenine
C) thymine... cytosine
D) uracil... cytosine

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The backbone of DNA consists of ________.


A) nitrogenous bases
B) a repeating sugar-nucleotide-sugar-nucleotide pattern
C) a repeating sugar-phosphate-sugar-phosphate pattern
D) paired nucleotides

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What is the smallest number of nucleotides that must be added or subtracted to change the triplet grouping of the genetic message?


A) one
B) two
C) three
D) four

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What type of chemical bond joins the bases of complementary DNA strands?


A) ionic
B) covalent
C) hydrophilic
D) hydrogen

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Flu vaccines have been demonstrated to protect the elderly,as shown in the figure below.Assume there is a sample of 100 elderly people that normally would be hospitalized in winter.How many of them would you predict would still be hospitalized in the winter if all 100 of them received the flu vaccine? Flu vaccines have been demonstrated to protect the elderly,as shown in the figure below.Assume there is a sample of 100 elderly people that normally would be hospitalized in winter.How many of them would you predict would still be hospitalized in the winter if all 100 of them received the flu vaccine?   A)  27 B)  48 C)  52 D)  73


A) 27
B) 48
C) 52
D) 73

Correct Answer

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Translation converts the information stored in ________ to ________.


A) DNA... RNA
B) RNA... a polypeptide
C) DNA... a polypeptide
D) RNA... DNA

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