Exam 2: The Chemistry of Microbiology

Max is exploring the properties of various compounds. Some of his explorations involve the use of a pH indicator that is red at low pH, yellow-green at neutral pH and blue to purple at high pH. He sets up several tubes containing water and the pH indicator and then begins to add some of the compounds (L, M, and N) he is characterizing in various combinations. His results are shown on the following table. What can Max conclude about his compounds based on these results? Describe the likely events in terms of hydrogen and hydroxyl ions.

Free

(Essay)

4.8/5

(65)

Question 1

Correct Answer:

Verified

Max's results are consistent with L being an acid and M being a weak base.Compound N appears to be a buffer.The green color of the indicator is seen when the concentrations of hydroxyl and hydrogen ions are equal.The red color of the solution indicates the concentration of hydrogen ions is greater than the hydroxyl ion concentration.The data does not provide information for calculating the concentrations.Blue and purple indicator colors show the hydroxyl ion concentrations exceed the hydrogen ion concentrations.The results with the mixes of L and M suggest that L dissolves to release five times more hydrogen ions than the concentration of hydroxyl ions produced by the ionization of M.Compound N accepts or releases ions with changing hydrogen ion concentrations to maintain equal concentrations of cations and anions.

A(n) ________ is an arrangement of atoms found in a variety of macromolecules.

Free

(Multiple Choice)

4.8/5

(77)

Question 2

Correct Answer:

Verified

Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is and Z is .

Free

(Multiple Choice)

4.9/5

(70)

Question 3

Correct Answer:

Verified

Which of the following is an accurate description of ATP?

(Multiple Choice)

4.8/5

(87)

Question 4

A nitrogenous base composed of two rings is a (purine/pyrimidine/ribose).

(Short Answer)

4.7/5

(75)

Question 5

A saturated fatty acid contains (no/one/multiple) double bonds.

(Short Answer)

4.9/5

(76)

Question 6

A reaction requires water as a reactant and produces heat. What type of reaction is likely to be involved?

(Multiple Choice)

4.9/5

(75)

Question 7

Hydrogen bonds are found in all of the following EXCEPT

(Multiple Choice)

4.9/5

(83)

Question 8

The double-strands of DNA result from the formation of ________ between the bases.

(Multiple Choice)

4.7/5

(82)

Question 9

A chemical reaction in which a water molecule is a reactant is known as a (dehydration/endothermic/hydrolysis) reaction.

(Short Answer)

4.8/5

(81)

Question 10

Which parts of the atoms interact in a chemical reaction?

(Multiple Choice)

4.7/5

(87)

Question 11

Cell surface markers composed of both carbohydrate and lipid molecules are known as (glycoproteins/glycolipids/LPS).

(Short Answer)

4.9/5

(85)

Question 12

All amino acids contain what functional group(s)?

(Multiple Choice)

4.8/5

(66)

Question 13

A weak acid may function as a

(Multiple Choice)

4.7/5

(85)

Question 14

Which of the following is an incorrect pairing?

(Multiple Choice)

4.8/5

(76)

Question 15

A nucleotide with a single cyclic ring structure is a pyrimidine.

(True/False)

4.8/5

(70)

Question 16

Dehydration synthesis is a common feature of polymer production in cells.

(True/False)

4.9/5

(76)

Question 17

A stable atom has ________ in its valence shell.

(Multiple Choice)

4.9/5

(66)

Question 18

Compare and contrast synthesis reactions with decomposition reactions.

(Essay)

4.8/5

(82)

Question 19

The valence of an atom is determined by the total number of electrons it contains.

(True/False)

4.7/5

(92)

Question 20

Showing 1 - 20 of 76

Exam 2: The Chemistry of Microbiology

A(n) ________ is an arrangement of atoms found in a variety of macromolecules.

Which of the following is an accurate description of ATP?

A nitrogenous base composed of two rings is a (purine/pyrimidine/ribose).

A saturated fatty acid contains (no/one/multiple) double bonds.

A reaction requires water as a reactant and produces heat. What type of reaction is likely to be involved?

Hydrogen bonds are found in all of the following EXCEPT

The double-strands of DNA result from the formation of ________ between the bases.

A chemical reaction in which a water molecule is a reactant is known as a (dehydration/endothermic/hydrolysis) reaction.

Which parts of the atoms interact in a chemical reaction?

Cell surface markers composed of both carbohydrate and lipid molecules are known as (glycoproteins/glycolipids/LPS).

All amino acids contain what functional group(s)?

A weak acid may function as a

Which of the following is an incorrect pairing?

A nucleotide with a single cyclic ring structure is a pyrimidine.

Dehydration synthesis is a common feature of polymer production in cells.

A stable atom has ________ in its valence shell.

Compare and contrast synthesis reactions with decomposition reactions.

The valence of an atom is determined by the total number of electrons it contains.

A Brief History of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Microbial Ecology and Microbiomes

Filters