ch 17(2) - Chapter 17 MULTIPLE CHOICE. Choose the one...

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Chapter 17 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Beadle and Tatum proposed the one gene-one enzyme concept. In its original form, this hypothesis could now be restated in which of the following ways? A)One DNA molecule contains the information to make one enzyme. B)A given sequence of DNA nucleotides contains the information to make one enzyme. C)Each gene contains the information to make one enzyme, one lipid, and one carbohydrate. D)Each gene is actually an enzyme that catalyzes the production of one protein. E)Each polypeptide is the result of the activity of one enzyme. The following questions refer to the following simple metabolic pathway: Enzyme a Enzyme b A B C 2) According to Beadle and Tatum's one gene-one enzyme hypothesis, how many gene(s) is (are) necessary for this pathway? A)0 B)1 C)2 D)3 E)It cannot be determined from the pathway. 3) A mutation results in a defective enzyme a . Which of the following would be a consequence of that mutation? A)an accumulation of A and no production of B and C B)an accumulation of A and B and no production of C C)an accumulation of B and no production of A and C D)an accumulation of B and C and no production of A E)an accumulation of C and no production of A and B 4) One strain of a diploid organism is homozygous for a recessive allele coding for a defective enzyme a . Another strain is homozygous for a recessive allele coding for a defective enzyme b . Crossing those two strains will result in a strain that would grow on which of the following? A)a minimal medium supplemented with A B)a minimal medium supplemented with B C)a minimal medium supplemented with both A and B D)All of the above will support the growth of the new strain. 5) Which of the following represents a similarity between RNA and DNA? A)the presence of a double- stranded helix B)the presence of uracil C)the presence of an OH group on the 3' carbon of the sugar D)nucleotides consisting of a phosphate, sugar, and nitrogen base E)repair systems that correct genetic code errors 6) The nitrogenous base adenine is found in all members of which of the following groups? A)proteins, triglycerides, and testosterone B)proteins, ATP, and DNA C)ATP, RNA, and genes D)alpha glucose, ATP, and DNA E)proteins, carbohydrates, and ATP 7) RNA differs from DNA in that RNA A)contains ribose as its sugar. B)is found only in cytoplasm. C)contains uracil instead of thymine. D)Both A and C are correct. E)A, B, and C are correct. 8) What is the primary transcript of eukaryotic genes? A)hnRNA B) tRNA C) rRNA D) mRNA E) DNA 9) If proteins were composed of only 12 different kinds of amino acids, what would be the smallest possible codon size in a genetic system with four different nucleotides? A)1 B) 2 C) 3 D) 4 E) 12 10) A new form of life is discovered. It has a genetic code much like that of organisms on Earth except that
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This note was uploaded on 06/07/2009 for the course BIO 5 taught by Professor Martins-green during the Spring '09 term at UC Riverside.

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ch 17(2) - Chapter 17 MULTIPLE CHOICE. Choose the one...

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