5. What is the difference between Smooth and Rough ER? . What is the difference between a lysosome and a vacuole? . Why do plants cells have cell walls? What organic compound are they made of?

5       Item 5 One example of a membrane-bound organelle is a ribosome. Group startsTrue or False   6       Item 6 Peroxisomes are membrane-bound organelles. Group startsTrue or False         Item7       Item 7 Which of the following choices describes three general functions cells must perform? Multiple Choice   a. Maintain shape, obtain nutrients, and dispose of wastes   b. Respond to all hormones, maintain a waterproof barrier, give rise to gametes   c. Grow until dividing, store complex carbohydrates, generate antibodies   d.Take up oxygen, prevent water entry, undergo mitosis frequently

1. Predict the membrane orientation of a protein that is synthesized with the following features: (Draw the protein on the membrane and indicate where the N-terminus and C-terminus are). ERSS STOP Start C cvtosol ER lumen Where would we find the N and C termini as this moves through the ER and Golgi? If this were a membrane protein, where we we find the N and C termini?

2. When stained with methylene blue (buccal cell) and haemalum acid (onion cell), the nuclei were the only cellular structures that stained. This has to do with the stains being cationic (positively charged). What charge do you think the nuclei are in order to be stained? A) Positive (cationic) B) Negative (anionic) C) Neutral  D) Hypotonic  3. FILL IN THE BLACKS USING THE BOLDED BRACKET OPTIONS: Observable physical differences between the three types of simple epithelial tissue are that squamous epithelial cells are _________ (flat, equal, more, less, cube, column, buccal, wider), whereas cuboidal epithelial cells have _____ (flat, equal, more, less, cube, column, buccal, wider) height and width and columnar epithelial cells have _______ (flat, equal, more, less, cube, column, buccal, wider) height than width.   Please explain to help me understand! Thank you!

What would you expect to see in a cell that contains a large pool of free GTP-tubulin dimers? microtubules would grow longer microtubules would shrink microtubules would contain GTP caps O A & C O B& C

28

18. What specific proteins make up the cellular cytoskeleton? What protein would you use to look at spindle fibers?

Can anybody suggest mixtures of phospholipids and/or sterols to better mimic plant plasma membranes?

21. Setup A contains a sucrose concentration of 30% , while setup B’s sucrose concentration is 15% Both were placed in a breaker of pure water. Which had the greater difference in concentration of water across the membrane?

11. Microtubules are ___________________