Exam (elaborations) OpenStax Microbiology Test Bank Chapter 7: Microb (BIOL2117)

.OpenStax Microbiology Test Bank Chapter 7: Microbial Biochemistry

Chapter 7: Microbial Biochemistry

* = Correct answer

Multiple Choice

1. Which of the following is the best definition of a macronutrient?
A. a trace element
B. a vitamin
C. an organic molecule necessary for life
D. the most abundant elements found in living cells*

Difficulty: Easy
ASM Standard: N/A

2. Amino groups are an important component of which of the following macromolecules?
A. carbohydrates
B. lipids
C. nucleic acids
D. proteins*

Difficulty: Easy
ASM Standard: N/A

3. The building blocks of polymers are called which of the following?
A. inorganic molecules
B. macromolecules
C. monomers*
D. nucleic acids

Difficulty: Easy
ASM Standard: N/A

4. Which of the following is not one of the four major types of carbon-based macromolecules
found in cells?
A. carbohydrates
B. lipids
C. macronutrients*
D. nucleic acids

Difficulty: Easy
ASM Standard: N/A

5. Which of the following is the typical, stable shape of glucose in cells?
A. a branched chain
B. a double ring


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,.OpenStax Microbiology Test Bank Chapter 7: Microbial Biochemistry

C. a ring*
D. a tetrahedron

Difficulty: Easy
ASM Standard: N/A

6. In which form do plants generally store sugar molecules?
A. cellulose
B. chitin
C. glycogen
D. starch*

Difficulty: Easy
ASM Standard: N/A

7. Which term specifically describes fatty acids that do not have any double bonds, triple bonds,
or rings?
A. esterified
B. polyunsaturated
C. saturated*
D. unsaturated

Difficulty: Easy
ASM Standard: N/A

8. Which of the following best describes the difference between steroids and sterols?
A. Steroids are the most common type of sterol.
B. Steroids contain rings, whereas sterols do not.
C. Sterols are a type of steroid with an OH group.*
D. Sterols are present in prokaryotes and steroids are not.

Difficulty: Moderate
ASM Standard: N/A

9. Which best describes oligopeptides?
A. a molecule consisting of two amino acids
B. long chains of amino acids
C. polymers of about 20 amino acids*
D. polymers of about 50 amino acids

Difficulty: Easy
ASM Standard: N/A

10. Which of the following is not a lipid?
A. a fatty acid
B. a glyceraldehyde*
C. a wax
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, .OpenStax Microbiology Test Bank Chapter 7: Microbial Biochemistry

D. an isoprenoid

Difficulty: Easy
ASM Standard: N/A

11. How many single covalent bonds can oxygen form?
A. one
B. two*
C. three
D. four

Difficulty: Moderate
ASM Standard: N/A

12. Which of the following molecules is an organic molecule?
A. CO2
B. CaCO3
C. CH3OH*
D. H2O

Difficulty: Moderate
ASM Standard: N/A

13. Which of the following is the best example of a micronutrient?
A. carbon
B. nitrogen
C. phosphorus
D. potassium*

Difficulty: Easy
ASM Standard: N/A

14. Which of the following best describes glucose, fructose, and galactose?
A. achiral
B. enantiomers
C. stereoisomers
D. structural isomers*

Difficulty: Moderate
ASM Standard: N/A

15. Why does it matter which enantiomer of a molecule is used for a medication?
A. Enantiomers can have different pharmacologic effects and only one may be effective.*
B. It is usually easier to prepare one enantiomer than mixtures of both.
C. The D form is typically more effective than the L form.
D. The L form is typically more effective than the D form.


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