Lecture HW #4

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Across
  1. 3. what part of the mitochondria that allows the passage of ions and small molecules
  2. 4. what serves as the main microtubules organizing center that regulates organization and growth of microtubules?
  3. 8. polymerase binds to a promoter sequence near the beginning of a gene
  4. 9. apparatus sorts proteins for their final destinations within the cell
  5. 11. DNA-directed synthesis of RNA
  6. 14. a complex, dynamic network of interlinking protein filaments that extends throughout the cell
  7. 16. what part of the cell is responsible for most of the endogenous proteins degradation in cells
  8. 17. motors what motor protein organized into thick filaments
  9. 18. code the set of instructions contained in a gene that tells a cell how to make a specific protein
Down
  1. 1. protein specialized proteins that convert chemical energy to mechanical work
  2. 2. the semi-fluid matrix inside the nucleus
  3. 5. adapter molecules that ferry amino acids to the ribosome based on the instructions on the mRNA
  4. 6. reticulum a system of channels enclosed by membrane
  5. 7. the exit point for the deacylated tRNA
  6. 10. positively charged proteins tightly wrap around the negatively charged DNA molecule
  7. 12. the entry point for a new tRNA molecule carrying an amino acid corresponding to the next codon on the mRNA
  8. 13. holds the tRNA that is currently linked to the growing polypeptide chain
  9. 15. an organelle that has membranous sacs of hydrolytic enzymes packaged by the golgi apparatus