Define the following words. Antiparallel Chromosome Origin of replication DNA helicase Primer Replication fork  DNA polymerase Semi-conservative replication Genome Histone proteins Telomere...

Define the following words.

  1. Antiparallel
  2. Chromosome
  3. Origin of replication
  4. DNA helicase
  5. Primer
  6. Replication fork
  7.  DNA polymerase
  8. Semi-conservative replication
  9. Genome
  10. Histone proteins
  11. Telomere
  12. Leading/lagging strands
  13. Topoisomerase.
Expert Answers
mrkirschner eNotes educator| Certified Educator
  1. Antiparallel-two biopolymers that run parallel to each other but with polar alignments, as seen in the DNA double helix

  2. Chromosome-the organized and packaged structure that houses most of the DNA of an organism

  3. Origin of replication-the particular sequence in a genome where replication is initiated

  4. DNA helicase-a vital class of enzymes vital to all organism whose main function is to unpackage an organism's genes

  5. Primer-a nucleic acid strand that is the starting point for DNA replication

  6. Replication fork-the process of producing identical replicas from one DNA molecule which is the basis for biological inheritance

  7. DNA polymerase- enzymes that are essential to DNA replication because they create DNA molecules by assembling nucleotides; creating two identical DNA strands from a single DNA molecule

  8. Semi-conservative replication-one of three models proposed for DNA replication; produces two copies, one that each contained the original strand and a new one

  9. Genome-the genetic material of an organism that contains DNA (or RNA in RNA viruses) that includes both the genes and the non-coding sequences of DNA/RNA

  10. Histone proteins-highly alkaline proteins that are found in eukaryotic cell nuclei that package and order the DNA into units called nucleosomes

  11. Telomere-a region of repeating nucleotide sequences at each end of a chromatid that protects the end of the chromosome from deteriorating or fusing with neighboring chromosomes

  12. Leading strand-the DNA strand that is synthesized continuously during replication  Lagging strand-the DNA strand that is replicated discontinuously from the 5’ to 3’ direction

  13. Topoisomerase-enzymes that regulate overwinding or underwinding of DNA that can occur because of the intertwined nature of the double-helical structure

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