ooo AT&T; LTE 1:52 PM 82%, docs.google.com BIO9 Review 2 (Ch3,17,19 Spring 17 Th
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ooo AT&T; LTE 1:52 PM 82%, docs.google.com BIO9 Review 2 (Ch3,17,19 Spring 17 The questions in the Review 2 are examples of questions that are possible in Exam2.Please nead your text books review concept maps and worksheets and watch videos at the class website. 1. Choose the CORRECT statement concerning the plasma membrane. Hydrophilic ends face towards water. Hydrophobic ends inwards, toward themselves. C. Proteins are embedded into the plasma membrane. D. The plasma membrane ts a fluid mosaic model structure. E. All of the choices are correct 2 which of the following would be least likely todiffuse through a phospholipid bilayer? A Carbon dioxide B Water C glucose molecules sodium ions 3.The assisted transport of a molecule across the cell membrane AGAINST the concentration gradient requiring the use of enersy is: B. facilitated diffusion C. active transport D. osmosis 4 which of the following best applies to the bulk movement dissolved material out of the cell? d. None of the above 5, Bulk movement of water across plasma membranes and the exchange of oreygen from blood transport is by facilitated transport. B endocytosis. D) active transport. sodium potassium pumps. 6. A student is designing an experiment to show the effects of the movement of water across selectively permeable membrane. He places a highly concentrat ed saltwater solution into a bag that is permeable only to water. He then submerges the bag into a beaker of pure water. Which of the following can be expected? The net flow of water will be from the bag to the surrounding water. B The pH of the contents of the bag will increase over time. C) The volume of the bag will decrease over time. D) The net flow of water will be from the beaker into the bag, causing the contents of the bag to in volume, EoIn this situation, the flow of water into the bag will never equal the fiowof water out of the bag, 7. Which of the following best explains how water moves freely across a plasma membrane? A) Water movesdirectly through the phospholipid bilayer because of the charges on B Water is brought into the cell by facilitated diffusion but released by exocytosis. C) It is actively transported across the membrane. D) Water moves through protein-lined channels in the plasma membrane. E The passage of water across plasma membrane requires facilitated transport. 8 Which of the following is true regarding active transport? Active transport requires energy. Molecules are moved across a plasma membrane from an area of higher concentration to an area of lower concentration. C) Active transport relies on the process of to be transported attach to phospholipids in the plasma membrane as the phospholipids change shape, the molecules are moved across the membrane. E)This mechanism allows a cell to equalize the concentration molecules on either side of the plasma membrane. 9.Peptides and small proteins are generally too large to be transported into cells using transport proteins or moving through pores. The macromolecules brought into the cell using diffusion. gated channels. open channels.Explanation / Answer
1. answer : E
2. answer : B (water)
3. answer: C (active transport)
4. answer : D (pinocytosis)
5. answer : C (Diffusion)
6. answer : D
7. answer : D
8. answer: A
9. answer: C
10.answer : C
11. answer : C
12. answer : B
Matching :
13. answer : e) Osmosis
14. answer : c) Phagocytosis
15. answer: b) exocytosis
16. answer : d) receptor mediated endocytosis
17. answer : isotonic
18. answer: B) smooth endoplasmic reticulum
19. answer: A) mRNA
20. answer : C) perioxisome
21. answer : E) transcription
13. answer :
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