worksheet 2

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1. a) Define a cell.  b) What is a unicellular organism? c) Can a cell be multicellular? A) the structural, functional, and biological unit of all organisms. B) a organism that only consisits on one cell C) A single cell cannot be multicellular. 2. a) What is a difference between prokaryotic and eukaryotic cells? b) What is one significant similarity? A) eukaryotic cells have a neuclus, prokaryotic cells do not. B) Both have DNA 3. Which type of microscopy provides a 3d view of the surface of an object? A) a scanning tunneling microscope 4. Would you find proteins inside cells or cells inside proteins? (Choose one answer.) proteins in cells 5. Which typeof molecule travels through an aquaporin? Water molecules 6.  Explain the basic organization (main components) of a plasma membrane. Include at least 4 distinct parts in your description. 1. Phospholipids – enhance the philological process 2. Glycoprotein-recognition factors for the membranc 3. Carbohydrates- same as no.2 4. Cholesterol – helps increase fluidity of the membrane 7. Osmosis is the net movement of ____water_______ across a __cell____________ from an area of _______high___ concentration to an area of ____low_______ concentration.  8. What would happen if an intravenous solution was hypertonic to blood? The cells in the area would have the water sucked out of them by osmosis 9. Why are the proteins that are involved in active transport often called pumps? Because the move substances against their concentration gradient 10.  What is an organelle? An organized structure in a cell 11. Which are the members of the endomembrane system? Golgi apparatus, lysosomes, microbodies, and the nuclear membrane 12. a) What two things make up chromatin? DNA and proteins  b) What is the difference between chromatin and chromosomes? Chromosomes is what chromatin is made up of 13. Why do macrophages, which fight microbes, contain many lysosomes? To help break down all the substances such as microbes 14. What is...
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