Biology Review

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Across
  1. 1. What splices together the short segments of the discontinuous strand?
  2. 5. extra copy of all or part of chromosome
  3. 8. tube-like excretory structures that filter body fluid
  4. 10. *two words* reads along each naked single strand adding the complementary nucleotid
  5. 11. innermost germ layer, develops into linings of digestive tract/respiratory system
  6. 12. middle layer, develops into muscle, most of circulatory, reproductive, excretory system
  7. 14. making RNA from a sequence of DNA bases
  8. 15. *two words* What is a gene mutations that involve changes in one or a few nucleotides
  9. 17. proteins are built on ribosomes, which are made of two subunits made up of ribosomal RNA molecules
  10. 18. What is a nucleic acid that consists of a long chain of nucleotide?
Down
  1. 2. bubble like structures that provide an enormous amount of surface area
  2. 3. chemical or agent in the environment that cause mutation
  3. 4. chordates with a backbone
  4. 6. What are long chains of amino acids called?
  5. 7. untwists the double helix and exposes complementary strands
  6. 9. part of chromosome breaks off and attaches to another
  7. 13. outermost layer, produces organs, nerves, and the outer layer of skin
  8. 15. tube connecting the mouth and esophagus
  9. 16. receives oxygen poor blood