Why was noncoding DNA previously called 'junk DNA' and why is the term no longer considered appropriate? How do comparisons of genomes of distantly related species (such as humans and mice) provide evidence for this

Explain the statement "In a comparison between the DNAS of related organisms such as humans and mice, identifying the conserved DNA sequences facilitates the search for functionally important regions" is true or false.

Would you be more likely to find single nucleotidepolymorphisms (SNPs) in the protein-coding or in thenoncoding DNA of the human genome?

If the intact chromosomes of E. coli are labeled with heavy nitrogen (15N), then E. coli is fed light nitrogen (14N), what would be the expected distribution of DNA by the fourth (F4) generation? 12.5% intermediate-weight DNA, and 87.5% light-weight DNA 25% intermediate-weight DNA, and 75% heavy-weight DNA 50% light-weight DNA, and 50% intermediate-weight DNA 75% intermediate-weight DNA, and 25% heavy-weight DNA 87.5% intermediate-weight DNA, and 12.5% heavy-weight DNA The above experiment, on DNA replication in the intact chromosomes of E. coli (with no virus infection) was first carried out by which of the following investigators? Rosalind Franklin and Maurice Wilkins Reiji Okazaki and Tuneko Okazaki Matthew Meselson and Franklin Stahl James Watson and Francis Crick Erwin Chargaff and Arthur Kornberg