Midterm+Section+C+Version+A

Midterm+Section+C+Version+A - Name_ Student ID_ (Multiple...

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Name________________________________ Student ID_________________________ (Multiple choice questions are worth 2 points each; 32 Q x 2 = 64 points) 1 I am taking version: A) A B) B 2 The entire “library” of genetic instructions that an organism inherits is called its: A) Biosphere B) Genome C) Nucleoid D) Emergent properties E) Histone 3 In class, we discussed the relationship between structure and function as a major principle of biological systems. Which of the following examples best demonstrates this principle's existence in the natural world? A) The emergence of a heartbeat out of individual cells B) Mitochondria producing ATP for leukocytes to phagocytose bacteria C) Energy exchange transforming energy from one source to another D) The highly-ordered nature of biological system E) Bones in bird wings are made lighter by air chambers that contribute to their ability to fly 4 Cells in the human body carry a protein called CD59, which lets an individual's immune system know that the cell belongs to that person and shouldn't be attacked. Viruses such as HIV hide from the immune system by mimicking CD59 so they also don't get attacked. Based on what you know about cell structure and function, where do you think a functional CD59 protein should be located in the cell so that the immune system doesn't attack it? A) Inside the nucleus B) Near the lysosomes C) In or on the cell membrane D) Surrounding the mitochondria E) Embedded in the cell wall 5 Which of the following would tend to decrease membrane fluidity? A) Unsaturated hydrocarbon tails of phospholipids B) Cholesterol within the plasma membrane at low temperatures C) Saturated hydrocarbon tails of phospholipids D) Cholesterol within the plasma membrane at higher temperatures E) C and D 6 What would happen to cells of a saltwater fish if placed in freshwater? A) Because the fresh water is hypotonic to the fish's cells, its cells would swell. B) Because the fresh water is hypertonic to the fish's cells, its cells would shrivel. C) Because water can flow both in and out of the cell, its cells would return to a state of isotonicity with respect to the fresh water. D) Facilitated diffusion would help return the cells in the fish to a state of isotonicity with respect to the fresh water. E) The fish would increase the expression of aquaporins so that the cells can return to a state of isotonicity with respect to the fresh water.
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Name________________________________ Student ID_________________________ 7 Glucose is co-transported into animal cells by: A) Active transport of H + out of the cell and subsequent diffusion of H + and glucose into the cell B) Active transport of glucose and Na + into the cell C) Active transport of Na + out of the cell by a Na + /K + pump and subsequent diffusion of H + and glucose into the cell D) Active transport of Na + out of the cell by a Na + /K + pump and subsequent diffusion of Na + and glucose into the cell
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This note was uploaded on 10/26/2010 for the course BIO SCI 93 taught by Professor Yu during the Fall '06 term at UC Irvine.

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Midterm+Section+C+Version+A - Name_ Student ID_ (Multiple...

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