객관식Who proposed the polynucleotide model, stating that DNA and RNA are composed of chains of nucleotides?156views
객관식After Mendel's work, biologists determined that a single chromosome carries which of the following?125views
객관식Which enzymes did Avery, MacLeod, and McCarty use in their experiments to identify DNA as the genetic material?165views
객관식Which experiment provided the first strong evidence that DNA is the genetic material in cells?161views