Biology Unit 3 Test with answers given PDF

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This is the answers and questions to the unit three biology test for SGSC. Hope this helps....

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Unit 3 Test 1. Which structure consists of a framework of different proteins that work together to provide a scaffold for the cell? Cytoskeleton 2. Which cell structure appears as a single large sphere in the cell? Nucleus 3. Which macromolecule would be found in the large structure described in the question above? DNA 4. Which structure is composed of a set of membranous folds and is involved in exporting proteins produced by the cell? Golgi 5. What structure allows a sperm cell to move? Flagella 6. Which cell structure is involved in protein and lipid synthesis? Endoplasmic Reticulum 7. Which cell structures are involved in converting sugar to ATP? Mitochondria 8. A scientist has used a staining dye to observe multiple cells. Not all cells were stained. The stained cells were smaller and contained circular DNA. The unstained cells were larger and contained linear DNA. What kind of cell is stained here? Prokaryotic 9. How do the stained and unstained cells differ? The stained cell does not have complex organelles 10. Another stain is used to investigate a plant protein. It is found that the protein is localized to the chloroplast. What is a reasonable hypothesis for the function of this protein? This protein could be used in photosynthesis. 11. One of the ways that stains work is by being transported across the cell membrane into the cell. If a stain molecule is large and polar, which type of membrane transport is likely used to move it into the cell? Facilitated diffusion 12. A stain can also work by attaching to the cell membrane itself. If a stain attaches to the hydrophobic portion of the cell membrane, which part of the cell membrane will be stained? The inner layer 13. How does the cell membrane work to maintain homeostasis? It allows certain molecules in and out depending on the needs of the cell. 14. Some stains can bond with the components of cell walls. How could these stains be used? To distinguish between animal and plant cells...