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Week 3 Rec Q Answers Ala Shaun

Week 3 Rec Q Answers Ala Shaun - are the major cell...

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Bio 150 2081 Recitation Week 3 1. What types of chemical interactions are involved in forming tertiary structures of proteins? a. Sulfur Bridges (covalent) b. Hydrogen Bonding (non-covalent) c. Vander Waals Interactions (non-covalent) d. Electrostatic Interactions (non-covalent) 2. Draw the dimer formed by the amino acids glycine and Alanine. Using dashed lines, box the peptide-bond formed between the amino acids. Label the N-terminus and the C- terminus (the amino and carboxyl groups). 3. A microbiologist examines a pancreatic animal cell under a transmission electron microscope. Cells from the pancreas are specialized for the manufacture and export of digestive enzymes (proteins). What are the major cell structures that are likely to be found in great quantities in pancreatic cell? a. Generally, the endomembrane system should be rather pronounced with remarkable rough ER and Golgi. Also, many ribosomes would be expected. 4. Many proteins which are synthesized in cells must be transported out of the cell. What
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Unformatted text preview: are the major cell structures that are involved in protein synthesis? Trace the path of a protein from its synthesis to its secretion from the cell's plasma membrane. a. Nucleus Æ ER Æ Golgi Æ Cytoplasmic 5. What is the major distinction between a prokaryotic and a eukaryotic cell? a. A prokaryotic cell does not have a nucleus, whereas a eukaryotic cell does. b. A prokaryotic cell does not have DNA, whereas a eukaryotic cell does. c. A prokaryotic cell is smaller than a eukaryotic cell. d. Prokaryotic cells have not prospered, whereas eukaryotic cells are evolutionary “successes.” e. A prokaryotic cell cannot obtain energy from its environment. 6. The organelle below is found in all eukaryotic cells but is most numerous in cells requiring a lot of energy (liver cells have thousands). This organelle is known as a a. lysosome. b. Golgi apparatus. c. rough endoplasmic reticulum. d. mitochondrion. e. chloroplast....
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