23) Your roommate is experiencing heartburn and asks you to purchase her an anta

Question

23) Your roommate is experiencing heartburn and asks you to purchase her an antacid. Chemically speaking, how do you know that the antacid will help eliminate her pain? A) It is a buffer and will prevent the pH in her digestive tract from changing. B) It has a low H+ concentration to increase the pH in her digestive tract. C) It is probably high in H+ D) It has a low pH to balance the acidity in her digestive tract. MATCHING. Choose the item in column 2 that best matches each item in column 1 Match each definition in the first column to the correct term in the second column. A) Triglycerides B) Tertiary structure C) Active site D) Denaturation E) Hydrogen bonds 24) A process that causes a three-dimensional protein to change shape, resulting in the loss of biological function. 25) Weak bonds that function to stabilize proteins and nucleic acids such as DNA. 26) The site where a substrate binds to an enzyme. 27) The overall three-dimensional shape of a protein. 28) Lipid molecules composed of one glycerol and three fatty acids that can be saturated, unsaturated, or polyunsaturated. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 29) A substance in which other substances are dissolved is known as a(n) A) solute B) acid C) solvent D) buffer 30) If you could remove all the phosphate in the cell, what would happen to the ATP cycle? A) It would stop when all the ATP had been converted into ADP B) It would stop when all the ADP had been converted into ATP C) It would cycle faster because the lack of phosphate would drive the cycle D) It would cycle faster because of the buildup of ATP E) It would not affect the ATP cycle 31) What is the name of a photograph of a specimen obtained with a microscope? A) negative B) dermatome C) thermograph D) micrograph E) chromatograph

Explanation / Answer

23) Answer: A) It is a buffer and will prevent the pH in her digestive tract from changing.

Explanation: Antacids contain Aluminum and Magnesium which act as a buffer and prevent change in pH of stomach. Magnesium is an excellent laxative and causes excretion of byproducts formed during the reaction.

24) Answer: A process that causes a three- dimensional protein to change shape, resulting in the loss of biological function- Denaturation

25) Answer: Weak bonds that function to stabilize proteins and nucleic acids such as DNA- Hydrogen Bonds

26) Answer: The site where a substrate binds to an enzyme- Active Site

27) Answer: The overall three- dimensional shape of a protein- Tertiary Structure

28) Answer: Lipid molecules composed of one glycerol and three fatty acids that can be saturated, unsaturated, or polyunsaturated- Triglycerides

29) Answer: C) Solvent

30) Answer: A) It would stop when all the ATP had been converted into ADP.

31) Answer: D) Micrograph.

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