The A and B forms of DNA a. both have 10 base pairs per turn of the helix b. bot
ID: 99930 • Letter: T
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The A and B forms of DNA a. both have 10 base pairs per turn of the helix b. both have 11 base pairs per turn of the helix c. are both left-handed helices d. arc both right-handed helices Quaternary structure refers to the non-covalent interaction(s) between polymeric units, such as two or more monomer protein units that noncovalently interact. Which of the following scenarios for nucleic acids most closely resembles quaternary- structure? a. self-assembly of subunits in the tobacco mosaic virus b. interaction of DNA with proteins c. RNlambda and protein association in ribosomes d. All of these c. None of these The three-dimensional structure of transfer RNA has been determined by a. analytical ultracentrifugation b. gel electrophoresis c. ultraviolet spectroscopy d. x-ray crystallography Which of the following statements concerning transfer RNA is true? a. It has the highest molecular weight of the commonly occurring forms of RNA. b. It has no internal hydrogen bonding. c. It bonds to amino acids in the course of protein synthesis. d. It is the smallest of the RNA types e. All of these arc true. In analytical ultracentrifugation the sedimentation coefficient, which is expressed in Svedberg units(S), characterizes a sedimenting particle on the basis of a. size only b. shape only c. both size and shape d. neither size nor shape Transfer RNA molecule are characterized by all the following except: a. They are one of the largest of the RNAs. b. Cloverleaf shape. c. Many modified bases. d. Extensive secondary and tertiary structure. e. All of these characterize transfer RAN molecules.Explanation / Answer
13)d. are both are right hand helices
the A and B forms have right hand helices.
14)d. All of these
15)The three dimensional structure of transfer rna is determined by
d.X- ray crystallography
16)c. It bonds to amino acids in the course of protein synthesis.
17)c.both size and shape
18)a. They are one of the largest of the RNAs.
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