Homework Answers
11) Pepsin is the chief digestive enzyme in the stomach that breaks down proteins. We know that chief cells produce pepsinogen (an inactive form of pepsin). Pepsinogen is converted to pepsin when the parietal cells found within the gastric glands secrete hydrochloric acid.
And we know that gastrin is that enzyme which produces gastric acid i.e. hydrochloric acid.
So, Pepsinogen is activated by Gastrin.
So answer is option-A
12)
DNA ligase is an enzyme which can connect two strands of DNA together by forming a bond between the phosphate group of one strand and the deoxyribose group on another.
And AMP is the last leaving group in this process.
So our answer is, option-C
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QUESTION 11 Pepsinogen is activated by: A. gastrin B. trypsinogen C. pepsinogen D. elevated pH QUESTION...
Question 27 (1 point) Extremely elevated serum levels of gastrin are typically indicative of a) Zollinger-Ellison...
Question 27 (1 point) Extremely elevated serum levels of gastrin are typically indicative of a) Zollinger-Ellison syndrome. b) cystic fibrosis. c) diabetes mellitus. d) insulinoma. Question 28 (1 point) Exogenous digestion of lipids results in the formation of which of the lipoproteins listed below? a) IDL b) HDL c) Chylomcirons d) VLDL
Question 10 (1 point) Identify the chemical reasons for the large negative Delta G associated with...
Question 10 (1 point) Identify the chemical reasons for the large negative Delta G associated with hydrolysis of ATP to ADP + P. (Select all that apply, marks will be deducted for incorrect responses) a) The ability of the phosphate group of ATP to participate in a variety of reactions with common functional groups. O b) Release of charge repulsion among the negative charges c) ionization of ADP2-to form ADp3- and H+ d) The presence of the enzyme pyrophosphatase which...
QUESTION 11 When a mitogen-activated signal transduction cascade is activated, what happens to (a) the phosphorylation...
QUESTION 11 When a mitogen-activated signal transduction cascade is activated, what happens to (a) the phosphorylation state of PRB and to (b) the status of PRB's E2F binding switch? (a) PRB state: phosphorylated (b) switch: ON (activated) - E2F bound CA (a) PRB state: phosphorylated B. (b) switch: OFF (inactivated) - E2F released (a) PRB state: is not phosphorylated C. (b) switch: ON (activated) - E2F bound (a) PRB state: is not phosphorylated D.(b) switch: OFF (inactivated) - E2F released
12. Pulmonary stretch receptors are activated during: A) inspiration B) expiration C) high 02 levels D)...
12. Pulmonary stretch receptors are activated during: A) inspiration B) expiration C) high 02 levels D) low O 2 levels E) A and D 13. When PSRS are activated, they inhibit: A) sensing of O2 by peripheral chemoreceptors B) sensing of CO2 by central chemoreceptors C) inspiration D) expiration
9. All activated 1ymphocytes become.... a. plasma cells b. effector cells. c. memory cells. d. cytotoxic...
9. All activated 1ymphocytes become.... a. plasma cells b. effector cells. c. memory cells. d. cytotoxic cells e. effector and memory cellsob 10. The bacterial lung intection acquired by inhalation ot aerosols of contasinates water is known as M. a. whooping cough. b. walking preumonia. c. influenza. d. Legionnaires' disease 11. Mycobacteriun leprae is only grown in living cella. 5. Th a. True b. False 12. which of the following agento travel up the nerves to penetrate the cs a....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
40) The sugar found in DNA has how many carbons: b) 2 c) 3 d) 5...
40) The sugar found in DNA has how many carbons: b) 2 c) 3 d) 5 e) 6 41) The two strands of DNA are held together through the: a) sugar b) phosphate e) ester d) nitrogenous base e) glycerol 42) The membrane of the cell is compose of how many layers of phospholipids: a) 1 b) 2 c) 3 d) 4 e) 5 43) Nucleotides have a sugar, a phosphate and a group: a) nucleus b) nucleic acid c)...
23. Every enzyme functions best at A. high pH. B. low pH. C. optimum pH. D....
23. Every enzyme functions best at A. high pH. B. low pH. C. optimum pH. D. neutral pH. 24. Which of the following is an example of an enzyme-substrate complex? A. glucose B. glucase C. vitamin D D. sucrose-sucrase 25. An example of an enzyme is A. maltose. B. fructose. C. hydrogen peroxide. D. dehydrogenase. 26. Which of the following is (are) component(s) of all cells? A. plasma membrane B. DNA C. cytoplasm D. nucleus E. a, b, and c...
QUESTION 11 What are the expected products of the following reaction? ethanol HCI, heat b HO...
QUESTION 11 What are the expected products of the following reaction? ethanol HCI, heat b HO A.c, b B.a, e C.a, b D.ad E.c,d QUESTION 12 Which of the following statements is not true about the reactions of carboxylic acid derivatives? For a reaction to occur, the added group must be a stronger base than the group attached to the acyl group B. Carboxylic acid derivatives form a tetrahedral intermediate. Less reactive derivatives can be converted directly into more reactive...
11. To have communication between cells, you must have a A) B) C) D) receptor. signaling...
11. To have communication between cells, you must have a A) B) C) D) receptor. signaling molecule. responding cell. All of these choices are correct. 12. A cell that responds to an environmental condition by the release of a chemical is an example of which of the following elements of cellular communication? A) a signaling cell B) a signaling molecule C) a receptor protein D) a responding cell E) None of the other answer options is correct 13. A chemical...
Question 27 (1 point) Extremely elevated serum levels of gastrin are typically indicative of a) Zollinger-Ellison syndrome. b) cystic fibrosis. c) diabetes mellitus. d) insulinoma. Question 28 (1 point) Exogenous digestion of lipids results in the formation of which of the lipoproteins listed below? a) IDL b) HDL c) Chylomcirons d) VLDL
Question 10 (1 point) Identify the chemical reasons for the large negative Delta G associated with hydrolysis of ATP to ADP + P. (Select all that apply, marks will be deducted for incorrect responses) a) The ability of the phosphate group of ATP to participate in a variety of reactions with common functional groups. O b) Release of charge repulsion among the negative charges c) ionization of ADP2-to form ADp3- and H+ d) The presence of the enzyme pyrophosphatase which...
QUESTION 11 When a mitogen-activated signal transduction cascade is activated, what happens to (a) the phosphorylation state of PRB and to (b) the status of PRB's E2F binding switch? (a) PRB state: phosphorylated (b) switch: ON (activated) - E2F bound CA (a) PRB state: phosphorylated B. (b) switch: OFF (inactivated) - E2F released (a) PRB state: is not phosphorylated C. (b) switch: ON (activated) - E2F bound (a) PRB state: is not phosphorylated D.(b) switch: OFF (inactivated) - E2F released
12. Pulmonary stretch receptors are activated during: A) inspiration B) expiration C) high 02 levels D) low O 2 levels E) A and D 13. When PSRS are activated, they inhibit: A) sensing of O2 by peripheral chemoreceptors B) sensing of CO2 by central chemoreceptors C) inspiration D) expiration
9. All activated 1ymphocytes become.... a. plasma cells b. effector cells. c. memory cells. d. cytotoxic cells e. effector and memory cellsob 10. The bacterial lung intection acquired by inhalation ot aerosols of contasinates water is known as M. a. whooping cough. b. walking preumonia. c. influenza. d. Legionnaires' disease 11. Mycobacteriun leprae is only grown in living cella. 5. Th a. True b. False 12. which of the following agento travel up the nerves to penetrate the cs a....
15. Genetic defect in pyruvate dehydrogenase complex lead a. maple syrup urine disease b. phenyike d. lactic acidemia e. pellagra syrup urine disease b, phenylketonuria c. galactosemia 10. Chemical modification by phosphorylation of pyruvate dehydros a. deactivates the enzyme b. activates the enzyme lation of pyruvate dehydrogenase complex : 17. Pyruvate carboxylase is positively ated through the allosteric mechanism by : a. ATP b. NADH c. Acetyl-SCOA d. TPP e. Biotin 18. Which of the listed coenzymes does not particip...
40) The sugar found in DNA has how many carbons: b) 2 c) 3 d) 5 e) 6 41) The two strands of DNA are held together through the: a) sugar b) phosphate e) ester d) nitrogenous base e) glycerol 42) The membrane of the cell is compose of how many layers of phospholipids: a) 1 b) 2 c) 3 d) 4 e) 5 43) Nucleotides have a sugar, a phosphate and a group: a) nucleus b) nucleic acid c)...
23. Every enzyme functions best at A. high pH. B. low pH. C. optimum pH. D. neutral pH. 24. Which of the following is an example of an enzyme-substrate complex? A. glucose B. glucase C. vitamin D D. sucrose-sucrase 25. An example of an enzyme is A. maltose. B. fructose. C. hydrogen peroxide. D. dehydrogenase. 26. Which of the following is (are) component(s) of all cells? A. plasma membrane B. DNA C. cytoplasm D. nucleus E. a, b, and c...
QUESTION 11 What are the expected products of the following reaction? ethanol HCI, heat b HO A.c, b B.a, e C.a, b D.ad E.c,d QUESTION 12 Which of the following statements is not true about the reactions of carboxylic acid derivatives? For a reaction to occur, the added group must be a stronger base than the group attached to the acyl group B. Carboxylic acid derivatives form a tetrahedral intermediate. Less reactive derivatives can be converted directly into more reactive...
11. To have communication between cells, you must have a A) B) C) D) receptor. signaling molecule. responding cell. All of these choices are correct. 12. A cell that responds to an environmental condition by the release of a chemical is an example of which of the following elements of cellular communication? A) a signaling cell B) a signaling molecule C) a receptor protein D) a responding cell E) None of the other answer options is correct 13. A chemical...
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