H-DNA contains strands of all purine or all pyrimidines which form triple-strand
ID: 536550 • Letter: H
Question
H-DNA contains strands of all purine or all pyrimidines which form triple-stranded helices. Meselson and Stahl showed that DNA replication is semi-conservative, by growing bacteria in media containing different isotopes of phosphorus and measuring the density of the bacterial DNA in density gradients. Hershey and Chase showed that DNA is the genetic material, because when they infected bacteria with a virus containing ^32 P-labeled DNA and ^35 S-labeled proteins, the new viruses produced by the infection contained only ^32 P. CO_2, like H_2 O, is polar and have a dipole moment.Explanation / Answer
4. Hinged DNA (H-DNA) contains stands of all purine and pyrimidine which form triple standard helics. True
5. Meselson and stahl proved that dna replication is semiconservative, by growing bacteria in media containing different isotopes of phosphorous and measuring the density of the bacterial DNA in density gradients. True
6. Hershey and chase showed that DNA is the genetic material because when they infected bacteria in a virus containing 32P-labeled DNA and 35 S-labeled proteins, the new viruses produce an infection containing only 32P. True
7. CO2 like H2O is polar and have a dipole moment. False
CO2 is linear molecule having zero dipole moment and is non polar in nature. While H2O having bent geometry have some dipole moment and is a polar molecule.
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