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University of Calgary *

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Biology

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Dec 6, 2023

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docx

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Quiz2 Started on Friday, 3 March 2023, 11:20 AM State Finished Completed on Friday, 3 March 2023, 11:49 AM Time taken 29 mins 30 secs Question 1 Complete Mark 1.0 out of 1.0 ¥ Flag question Question 2 Complete Mark 10 out of 10 ¥ Flag question Question 3 Complete Mark 20 out of20 ¥ Flag question Question 4 Complete Mark 2.0 out of30 ¥ Flag question Marks 15.0/17.0 Grade 1.8 out of 2.0 (88.2%) A plant cell wall will: a. Prevent plasmolysis in a hypotonic environment b. Provide for turgor pressure in a hypotonic environment c. Prevent plasmolysis in a hypertonic environment d. Provide for turgor pressure in an isotonic environment ©Of the following functions, which is most important for the glycoproteins and glycolipids of animal cell membranes? a. Maintaining membrane fiuidity at low temperatures b. The cells ability to distinguish one type of neighboring cell from another c. Active transport of molecules against their concentraton gradients d. Facilitated diffusion of molecules down their concentration gradients Select ALL of the following statements that correctly describe how an enzyme lowers the activation energy of a chemical reaction. There three correct responses. a. by removing energy from the substrate b. by aligning substrate molecules to allow for a correct formation of bonds <. by increasing the reactivity of the product d. by straining the bonds in the substrate e. by creating a more favorable charge environment for the substrate within the active site f. by providing energy to accelerate the reaction Describe the molecule shown below and explain how living cells can use this to do work. Gamma Alpha ) phosphate phosphate —~nN group group N < Y T I T Q N 0=P—0—P—0—P—0 N - o = o Beta phosphate OH OH rouj el Ribose This molecule is an example of ATP. It releases energy by breaking down pyrophosphate bonds, making it exergonic. Cells use this energy to carry out cellular tasks like mobility, transportation, and chemical reactions.
Question 5 Complete Mark 10 out of10 ¥ Flag question Question 6 Complete Mark 10 out of10 ¥ Flag question Question 7 Complete Mark 10 out of10 ¥ Flag question Which of the following energy generating processes is the only one that occurs in all iving organsims? a. glycolysis b. Calvin cycle <. citric acid cycle d. oxidative phosphorylation Fermentation a. uses oxygen to accept the terminal electrons b. generates pyruvate as its end product c. generates additional ATP after glycolysis is done d. regenerates NAD+ from NADH During the citric acid cycle: a. cellular respiration will continue in the absence of oxygen b. the products of glycolysis are further broken down generating additional ATP and NADH c. the products of glycolysis are broken down generating ethanol and ATP d. high energy electron carriers pass their energy to molecules of sugar which store the electrons as a form of potential energy.
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