1. E. coli and elephants. What is meant by the phrase “unity of biochemistry”? What are the implications of the unity of biochemistry?
2. Similar, but not the same. Describe the structural differences between DNA and RNA. ✓ 1
3. Polymers. Differentiate between proteins and glycogen in regard to their polymeric structure. ✓ 1
4. An authoritative belief. Define the central dogma of biology. ✓ 2
5. Information processing. Define replication, transcription, and translation in regard to the central dogma. ✓ 2
6. Hurry it up. What is an enzyme? ✓ 1
7. Complex and less so. Differentiate between eukaryotic cells and prokaryotic cells. ✓ 3
8. A diminutive organ? What is an organelle? ✓ 3
9. Double bounded. Which organelles are surrounded by two membranes?
10. Perforated. How does the nuclear membrane differ from other membranes?
11. An exit strategy. Trace the pathway of the formation of a secretory protein from its gene to its exocytosis from the cell.
12. Function and structure. Match the function with the appropriate organelle in the column at right.
Endoplasmic reticulum Smooth endoplasmic reticulum Rough endoplasmic reticulum Golgi complex Transport vesicles Secretory granules Endosome Lysosome Mitochondrion Chloroplast Nucleus Plasma membrane | Separates the inside of the cell from the outside Facilitate communication between the rough endoplasmic reticulum and the Golgi complex Processes exogenous chemicals Contains digestive enzymes Site of photosynthesis Membrane with ribosomes attached Site of carbohydrate addition to proteins Common form of cytoplasmic membrane Destined for fusion with the plasma membrane Site of fuel oxidation Location of most of the cell’s DNA Carries important biochemicals into the cell |
Selected Readings for this chapter can be found online at www.whfreeman.com/