Lauren's Biology Crossword

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Across
  1. 7. An enzyme that catalyzes the synthesis of an RNA strand from a DNA template.
  2. 11. It is paired with adenine in double-stranded DNA.
  3. 12. an enzyme produced chiefly by certain bacteria, having the property of cleaving DNA molecules at or near a specific sequence of bases.
  4. 13. a sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule.
  5. 15. Is the first step of gene expression, in which a particular segment of DNA is copied into RNA.
  6. 17. state that DNA from any cell of all organisms should have a 1:1 ratio and , that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
  7. 18. ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA.
  8. 23. the analysis of DNA from samples of body tissues or fluids, especially when conducted in order to identify individuals.
  9. 26. a gene or short sequence of DNA used to identify a chromosome or to locate other genes on a genetic map.
  10. 27. A sugar derived from ribose by replacing a hydroxyl group with hydrogen.
  11. 28. relating to or denoting an organism that contains genetic material into which DNA from an unrelated organism has been artificially introduced.
  12. 30. consisting of folded molecules that transport amino acids from the cytoplasm of a cell to a ribosome.
Down
  1. 1. the form of RNA in which genetic information transcribed from DNA as a sequence of bases is transferred to a ribosome.
  2. 2. are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes.
  3. 3. is one of the four constituent bases of nucleic acids. A purine derivative, it is paired with cytosine in double-stranded DNA.
  4. 4. DNA that has been formed artificially by combining constituents from different organisms.
  5. 5. The cell's essential protein factory.
  6. 6. an organism or cell, or group of organisms or cells, produced asexually from one ancestor or stock, to which they are genetically identical.
  7. 8. is an enzyme that synthesizes short RNA sequences called primers.
  8. 9. the technique used by biologists to make many copies of a particular gene.
  9. 10. a sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA.
  10. 14. During DNA replication a DNA double helix must unwind and separate so that DNA polymerase enzymes can use each single strand as a template for the synthesis of a new double strand.
  11. 16. any of the pairs of the hydrogen-bonded purine and pyrimidine bases that form links between sugar-phosphate backbones of nucleic acid molecules the pairs are adenine, thymine, cytosine, and guanine in DNA and uracil in RNA.
  12. 19. the action of copying or reproducing something.
  13. 20. It is paired with guanine in double-stranded DNA.
  14. 21. scientific tests or techniques used in connection with the detection of crime.
  15. 22. a genetic structure in a cell that can replicate independently of the chromosomes, typically a small circular DNA strand in the cytoplasm of a bacterium or protozoan. Plasmids are much used in the laboratory manipulation of genes.
  16. 24. the transplantation of normal genes into cells in place of missing or defective ones in order to correct genetic disorders.
  17. 25. an enzyme that brings about ligation of DNA or another substance.
  18. 29. a compound that is one of the four constituent bases of nucleic acids. A purine derivative, it is paired with thymine in double-stranded DNA.