Assignment-1B-BLANK

Assignment 1 B (H–M) For students with first names starting with the letters H to M. Assignments are graded out of a total of 60 points, and they are worth 9% of your total mark. Submit this assignment after you have completed Unit 1 of the course. Before you submit this assignment, make sure you have read the section on Assignments in your Course Orientation. Part A: Short-answer questions 1. Use an example to explain why scientific experiments need many replicates. (3) 2. Describe five important structural aspects that you would find in a mitochondrion. (5) 3. Name two important structures of the cytoskeleton, and describe at least one structural and one functional aspect of each. (6) Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B

4. Label the three indicated parts of the illustration of a cell given below, and answer the accompanying two questions. (12) 4a. 4) (2) 5) (2) 6) (2) 4b. Would you expect this cell to be an animal cell, a plant cell or a different organism? (3) 4c. Explain your choice. (3) Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B

Part B: Multiple-choice questions Choose one answer only. Enter your choice into the form field below the question. 1. Scientists frequently use experiments to confirm expected outcomes or “educated guesses.” The latter are referred to as a. theories b. hypotheses c. generalizations d. outcomes e. dogmas 2. Which of the following statements refers directly to the cell theory? a. Prokaryote and eukaryote cells are fundamentally different. b. All cells have cell walls. c. Only some cells have cell walls. d. All cells have ribosomes. e. A liver cell originates from the division of another liver cell. 3. Which of the following structures can be found in a prokaryote? a. Golgi complex b. Nucleolus c. Flagella d. Amyloplasts e. Mitochondria 4. The endomembrane system describes a. ER and Golgi complex and is found in prokaryotes b. ER and Golgi complex and is found in eukaryotes c. ER and Golgi complex and is found in both pro- and eukaryotes d. the cell membrane in all cells e. the membranes inside mitochondria and chloroplasts Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B

5. Which of the following structures in a cell has a double membrane? a. Lysosome b. Aquaporin c. Nucleoid d. Vacuole e. Nucleus 6. Thylakoids are parts of a. cell membranes b. cell walls c. mitochondria d. plastids e. nuclei 7. In which of the following organelles can DNA be found? a. Plastids b. Golgi complex c. ER d. Ribosomes e. Vacuoles 8. Which of the following structures can be found both in prokaryotes and eukaryotes? a. Golgi complex b. Nucleoid c. Plastid d. Ribosome e. Nucleus 9. Which of the following organelles are frequently close together? a. Nuclei and plastids b. Nuclei and mitochondria c. Plastids and mitochondria d. Lysosomes and plastids e. Ribosomes and ER Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B

15. A molecule that is moved from the nucleolus to the exterior of a cell has to pass through at least a. one membrane b. two membranes c. three membranes d. four membranes e. eight membranes 16. Gated channel proteins are examples of structures that allow a. primary active transport b. secondary active transport c. exchange diffusion d. facilitated diffusion e. osmosis 17. Active membrane transport involves a. movement along a concentration gradient b. diffusion c. movement against a concentration gradient d. receptor-mediated endocytosis e. all of the above 18. Which of the following terms relates to phagocytosis? a. Endocytosis b. Exocytosis c. Pinocytosis d. Cell drinking e. All of the above 19. Which term can be associated with exchange diffusion? a. Osmosis b. Active transport c. Facilitated diffusion d. Passive transport e. Peripheral membrane protein Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B

20. The function of plasmodesmata is to a. connect the cytoplasm of adjacent animal cells b. connect the cytoplasm of adjacent plant cells c. prevent exchange between the cytoplasm of adjacent animal cells d. prevent exchange between the cytoplasm of adjacent plant cells e. facilitate exocytosis from cells After receiving the marked assignment back, carefully read all comments from the marker and revise accordingly. If you had any of the MCQ incorrect, make sure to understand why you went wrong. Many studies have shown that revising mistakes results in learning improvement and closes gaps in your understanding. Do not hesitate to contact your Academic Expert if any of the comments are unclear. If your total mark for the assignment is below 75%, contact your Academic Expert for advice on how to improve your study habits. Biology 204: Principles of Biology I (Rev. C8) Assignment 1 B