Cells

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Across
  1. 4. virus that infects bacteria
  2. 7. one of two identical "sister" parts of a duplicated chromosone
  3. 9. a change or alteration, as in form or nature.
  4. 11. monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
  5. 12. a segment of DNA to which a transcription factor binds to regulate gene expression by repressing i
  6. 13. a small RNA molecule, consisting of a strand of nucleotides folded into a clover-leaf shape, that picks up an unattached amino acid within the cell cytoplasm and conveys it to the ribosome for protein synthesis.
  7. 17. the process by which cells or tissues change from relatively generalized to specialized kinds, during development.
  8. 18. having a chromosome number that is more than double the basic or haploid number.
  9. 20. the act or process of transcribing.
  10. 22. any portion of an interrupted gene that is represented in the RNA product and is translated into protein.
  11. 23. a change in a single base in a nucleotide sequence.
  12. 24. a noncoding segment in a length of DNA that interrupts a gene-coding sequence or nontranslated sequence, the corresponding segment being removed from the RNA copy before transcription.
  13. 25. an enzyme that synthesizes the formation of RNA from a DNA template during transcription.
  14. 27. RNA molecule that carries copies of instructions for the assembly of amino acids into proteins from DNA to the rest of the cell
  15. 28. principle that bonds in DNA can form only between adenine and thymine and between guanine and cytosine
Down
  1. 1. copying process by which a cell duplicates its DNA
  2. 2. a set of two or more adjacent cistrons whose transcription is under the coordinated control of a promoter, an operator, and a regulator gene.
  3. 3. a mutation caused by frameshift.
  4. 5. process in which one strain of bacteria is changed by a gene or genes from another strain of bacteria
  5. 6. a triplet of adjacent nucleotides in the messenger RNA chain that codes for a specific amino acid in the synthesis of a protein molecule.
  6. 8. protein molecule around which DNA is tightly coiled in chromatin
  7. 10. change or conversion to another form, appearance, etc. transformation:
  8. 14. a site on a DNA molecule at which RNA polymerase binds and initiates transcription.
  9. 15. a sequence of three nucleotides in a region of transfer RNA that recognizes a complementary coding triplet of nucleotides in messenger RNA during translation by the ribosomes in protein biosynthesis.
  10. 16. enzyme involved in DNA replication that joins individual nucleotides to produce a DNA molecule
  11. 19. sequence of DNA that codes for a protein and thus determines a trait
  12. 21. type of RNA that makes up the major part of ribosomes
  13. 26. any of a class of genes that determines the basic structure and orientation of an organism.