Microbes and Society: Chapter 7 Practice Quiz

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Chapter 7 Growth and Metabolism: Running the Microbial Machine

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor. (Kris.. do you want me to turn on this option?)

1: Which of the following is not a characteristic of a growth curve?
	A: shows development of microbial population under relatively stable environmental conditions
	B: plotted with logarithmic numbers
	C: graphs numbers of microbes versus time
	D: each growth curve consists of 4 distinct phases

2: A psychrophilic halophile would be a microbes that prefers an environment with:
	A: cold temperatures and increased amounts of salt
	B: warm temperatures and increased amounts of pressure
	C: cold temperatures and the absence of oxygen
	D: warm temperatures and increased amounts of acid

3: A microbes that grows best in a low-oxygen environment is called a(n):
	A: Aerobe
	B: Anaerobe
	C: Facultative
	D: Microaerophile

4: Digestive reactions where large molecules are broken down into smaller ones are referred to as:
	A: anabolism
	B: catabolism
	C: metabolism
	D: biosynthesis

5: Organic molecules that increase the rate of metabolic reactions with themselves changing are called:
	A: coenzymes
	B: enzymes
	C: substrates
	D: reactants

6: The breakdown of glucose occurs by the process known as:
	A: glycolysis
	B: fermentation
	C: anaerobic respiration
	D: Krebs cycle

7: In the initial step of photosynthesis, sunlight energizes the electron pair of:
	A: adenosine triphosphate (ATP)
	B: chlorophyll pigments
	C: water
	D: carbon dioxide

8: As a result of the photosynthetic process, what product is formed?
	A: oxygen
	B: water
	C: carbon dioxide
	D: both a and b

9: In cells having organelles, the steps of the Krebs cycle and the electron transport system occur in the:
	A: cell membrane
	B: Golgi bodies
	C: mitochondria
	D: endoplasmic reticulum

10: During fermentation, pyruvic acid is converted into organic products such as:
	A: glucose and maltose
	B: starch and cellulose
	C: ethyl alcohol and lactic acid
	D: citric acid and isocitric acid

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