Lecture HW #4

3. what part of the mitochondria that allows the passage of ions and small molecules
4. what serves as the main microtubules organizing center that regulates organization and growth of microtubules?
8. polymerase binds to a promoter sequence near the beginning of a gene
9. apparatus sorts proteins for their final destinations within the cell
11. DNA-directed synthesis of RNA
14. a complex, dynamic network of interlinking protein filaments that extends throughout the cell
16. what part of the cell is responsible for most of the endogenous proteins degradation in cells
17. motors what motor protein organized into thick filaments
18. code the set of instructions contained in a gene that tells a cell how to make a specific protein

1. protein specialized proteins that convert chemical energy to mechanical work
2. the semi-fluid matrix inside the nucleus
5. adapter molecules that ferry amino acids to the ribosome based on the instructions on the mRNA
6. reticulum a system of channels enclosed by membrane
7. the exit point for the deacylated tRNA
10. positively charged proteins tightly wrap around the negatively charged DNA molecule
12. the entry point for a new tRNA molecule carrying an amino acid corresponding to the next codon on the mRNA
13. holds the tRNA that is currently linked to the growing polypeptide chain
15. an organelle that has membranous sacs of hydrolytic enzymes packaged by the golgi apparatus