ch12.pdf - Exam MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 Viral chromosomes exist in a

ch12.pdf - Exam MULTIPLE CHOICE Choose the one alternative...

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ExamMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)Viral chromosomes exist in a variety of structures and can be made up of the following:1)A)DNA only.B)DNA, RNA, or protein.C)protein-or lipid-coding sequences.D)DNA or RNA.E)RNA only.2)InE. coli, the genetic material is composed of2)A)circular, double-stranded DNA.B)linear, double-stranded DNA.C)RNA and protein.D)polypeptide chains.E)circular, double-stranded RNA.3)Eukaryotic chromosomes contain two general domains that relate to the degree of condensation.These two regions are3)A)separated by large stretches of repetitive DNA.B)void of introns.C)called heterochromatin and euchromatin.D)each void of typical protein-coding sequences of DNA.E)uniform in the genetic information they contain.4)In human chromosomes, satellite DNA sequences of about 170 base pairs in length are present intandem arrays of up to 1 million base pairs. Found mainly in centromere regions, they are called4)5)In addition to highly repetitive and unique DNA sequences, a third category of DNA sequencesexists. What is it called, and what types of elements are involved?5)6)Chromatin of eukaryotes is organized into repeating interactions with protein octomers callednucleosomes. Nucleosomes are composed of which class of molecules?6)1
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7)That some organisms contain much larger amounts of DNA than are apparently "needed" and thatsome relatively closely related organisms may have vastly different amounts of DNA is moretypical in7)A)prokaryotes than in eukaryotes.B)RNA viruses than in DNA viruses.C)eukaryotes than in prokaryotes.D)viruses than in bacteria.E)the "alphoid" rather than the diphloid family.SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.8)While mutations have been observed in many different genes, they have not been isolatedin histones. Why does this seem reasonable? If one wanted to produce antibodies tohistones, would it be an easy task? Explain your answer.
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