Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 2, Problem 1MCQ
Assume E. coli bacteria are grown in a nutrient medium containing the radioisotope 16N. After a 48-hour incubation period, the 16N would most likely be found in the E. coli’s
- a. carbohydrates.
- b. lipids.
- c. proteins.
- d. water.
- e. none of the above
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Which of the following about protein denaturation is not trueA. It is always irreversible B. It is a shape change C. It may be due to pH / temperature change D. Most of the proteins denature when transferred from aqueous environment to organs solvents E. Its function is lost.
The folding of a protein
a
involves unfavorable entropy
b
involves favorable entropy
c
is non-spontaneous
d
occurs at a high Temperature (>90 C)
Explain why unfolding or aggrrgation may occur using changes in entropy and enthalpy of the protein and water.
a. The shift of a pH from pH 7 to pH 11
b. Addition of Triton-x (detergent) into buffer
c. Raising the temperature of the solution from 25 C to 100 C
Chapter 2 Solutions
Microbiology: An Introduction
Ch. 2 - What is a chemical element?Ch. 2 - DRAW IT Diagram the electronic configuration of a...Ch. 2 - What type of bond holds the following atoms...Ch. 2 - Classify the following types of chemical...Ch. 2 - Bacteria use the enzyme urease to obtain nitrogen...Ch. 2 - Classify the following as subunits of either a...Ch. 2 - DRAW IT The artificial sweetener aspartame, or...Ch. 2 - DRAW IT The following diagram shows the...Ch. 2 - Prob. 9RCh. 2 - Prob. 10R
Ch. 2 - Assume E. coli bacteria are grown in a nutrient...Ch. 2 - If Pseudomonas bacteria are supplied with...Ch. 2 - If E. coli were grown in a medium containing the...Ch. 2 - Prob. 4MCQCh. 2 - Prob. 5MCQCh. 2 - Prob. 6MCQCh. 2 - The dissociation products of the molecules are...Ch. 2 - Prob. 8MCQCh. 2 - The dissociation products of the molecules are...Ch. 2 - Prob. 10MCQCh. 2 - When you blow bubbles into a glass of water, the...Ch. 2 - Prob. 2ACh. 2 - Prob. 3ACh. 2 - Prob. 4ACh. 2 - Prob. 1CAECh. 2 - Prob. 2CAECh. 2 - Newborn babies are tested for phenylketonuria...Ch. 2 - The antibiotic amphotericin B causes leaks in...Ch. 2 - Prob. 5CAE
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is TRUE, if the protein pH is electrically neutral? Refer to the graph below. a. The denaturation of protein is lower than 100% b. The denaturation of protein is greater than 100% c. The protein is in native form d. The protein is completely denaturedarrow_forwardWhat are the most important components of a bioflim? (More than one can be chosen) A. nucleic acids B. Lipids and polysaccharides C. Glycocalyx and bacteria D. Moisturearrow_forwardWhich of the following is correct concerning an RNA molecule?a. It contains the sugar ribose.b. It may contain uracil as a nitrogen-containing base.c. It contains a phosphate molecule.d. All of the above are correct.arrow_forward
- Synthesis of proteins requires the input of energy, which can be provided by: a. enzymes b. synthesis of ATP from ADP and Pi c. hydrolysis of ATP to form ADP and Pi d. amino acids e. isotopesarrow_forwardCatalase, sucrase, lactase are examples of... A. simple sugars B. nitrogen bases C. enzymes D. lipidsarrow_forwardWhich of these is an advantage of phosphate buffer solutions in biological research? Select one: a. It is non-toxic to cells b. It is isotonic to the cellular environment c. It helps to maintain a constant pH in a chemical reaction d. All of the abovearrow_forward
- Pauling's model couldn't be right because: A. the negative oxygen atoms of the phosphate groups would repel in the middle of the molecule B. the bases on the outside would be attracted to each other and crush the molecule C. he forgot about the sugars D. the positive phosphate groups would repel each other in the middle of the moleculearrow_forwardbetween option a (water), option b (proteins), & option d (fats). which one would be correct? since its a one answer question.arrow_forwardWhen separating your organic and aqueous layer and collecting organic for the final time, is it better to take some of the aqueous layer than the organic layer to ensure collection of all of the organic layer, or to leave some of the organic layers with the aqueous layer to ensure collection of all of the aqueous layer? Explain why.arrow_forward
- Nucleic acids encode information in a. the number of carbon atoms in their sugar subunits. b. the number of phosphate groups attached to each sugar subunit. c. the sequence of nitrogenous bases attached to the sugar-phosphate backbone. d. the sequence of sugars and phosphates that make up the backbone of the molecule.arrow_forwardAn earlier mission to Mars contained instruments that determined that amino acids were present on the surface of Mars. Why were scientists excited by this discovery?arrow_forwardIf I synthesized a protein by chemically linking amino acids together and added a few extra amino acids that made the protein more stable and therefore better at treating a disease, what argument would support a patent for the protein? a. The protein is beneficial to humans and so I should be paid for my discovery. b. The protein is synthetic and different from the natural form. c. The protein was synthesized chemically. d. The protein is expensive to make and a patent would help me offset my costs of production.arrow_forward
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