MCB 3020 EXAM 1 QUESTIONS AND ANSWERS
If the decolorizer is not left on long enough in the Gram-staining procedure, Gram-
positive organisms will be stained _________ and Gram-negative organisms will be
stained _________. - Answers - purple; purple
Which of the following microscopes typically uses dyes or antibodies? - Answers -
Fluorescence microscope
Cells with a relatively complex morphology that have a true membrane-delimited
nucleus are called _________ - Answers - eukaryotes
Select a harmful effect that can result from bacterial colonization of the human body. -
Answers - Invasion of host cells
Antiseptic surgery was pioneered by _________ - Answers - Lister
Which of the following advances best describes the idea that today we may be
experiencing a second golden age of microbiology? - Answers - Genomic testing
The instrument that produces a bright image of the specimen against a dark
background is called a(n) _________ - Answers - dark-field
Carl Woese distinguished between the members of the Archaea and the Bacteria using
studies of their _________ - Answers - ribosomal RNA
A microbe is discovered living in an extreme environment near a deep sea vent. The
microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have
unusual membrane lipids. This species is most likely a member of the Domain
_________ - Answers - Archaea
The concept that living organisms arise from nonliving material is called _________ -
Answers - spontaneous generation
The term used to describe bacteria that have a spherical shape is _________ - Answers
- coccus
Which of the following structures are external to both bacterial and archaeal cells? -
Answers - Pili
The term used to describe bacteria that are rod-shaped is _________ - Answers -
bacillus
Flexible bacteria with a helical shape are called _________ - Answers - spirochetes
, All of the following statements about the periplasmic space are true except _________ -
Answers - it is found only in Gram-positive bacteria
The term used to describe bacteria that are shaped like curved rods is _________ -
Answers - vibrio
Which of the following is not true about archaeal ribosomes? - Answers - They have
similar antibiotic sensitivities to those of bacteria.
Rigid bacteria with a helical cell shape are called _________ - Answers - spirilla
Proteins are synthesized on structures called _________ - Answers - ribosomes
Which of the following diseases is (are) caused by prions?
Scrapie
Mad cow disease
Kuru and Creutzfeldt-Jakob Disease
All of the choices are correct. - Answers - All of the choices are correct.
The liquid component of the cytoplasm is known as the _________ - Answers - cytosol
Which of the following is a function of the mitochondrion?
Electron transport
All of the choices are correct.
ATP synthesis
Tricarboxylic acid cycle enzyme reactions - Answers - All of the choices are correct.
The Golgi apparatus is responsible for the _________ - Answers - packaging of
materials for excretion
The major site of cell membrane synthesis is the _________ - Answers - endoplasmic
reticulum
Which of the following is useful in distinguishing between bacterial, archaeal, and
eukaryotic cells?
The use of DNA for the storage of genetic information
The presence of membrane-delimited organelles within the cytoplasm
All of the choices are correct.
The presence of ribosomes for the synthesis of proteins - Answers - The presence of
membrane-delimited organelles within the cytoplasm
Which of the following organelles is involved in the modification, packaging, and
secretion of materials? - Answers - Golgi apparatus
If the decolorizer is not left on long enough in the Gram-staining procedure, Gram-
positive organisms will be stained _________ and Gram-negative organisms will be
stained _________. - Answers - purple; purple
Which of the following microscopes typically uses dyes or antibodies? - Answers -
Fluorescence microscope
Cells with a relatively complex morphology that have a true membrane-delimited
nucleus are called _________ - Answers - eukaryotes
Select a harmful effect that can result from bacterial colonization of the human body. -
Answers - Invasion of host cells
Antiseptic surgery was pioneered by _________ - Answers - Lister
Which of the following advances best describes the idea that today we may be
experiencing a second golden age of microbiology? - Answers - Genomic testing
The instrument that produces a bright image of the specimen against a dark
background is called a(n) _________ - Answers - dark-field
Carl Woese distinguished between the members of the Archaea and the Bacteria using
studies of their _________ - Answers - ribosomal RNA
A microbe is discovered living in an extreme environment near a deep sea vent. The
microorganism lacks a nucleus and peptidoglycan in its cell wall, but it does have
unusual membrane lipids. This species is most likely a member of the Domain
_________ - Answers - Archaea
The concept that living organisms arise from nonliving material is called _________ -
Answers - spontaneous generation
The term used to describe bacteria that have a spherical shape is _________ - Answers
- coccus
Which of the following structures are external to both bacterial and archaeal cells? -
Answers - Pili
The term used to describe bacteria that are rod-shaped is _________ - Answers -
bacillus
Flexible bacteria with a helical shape are called _________ - Answers - spirochetes
, All of the following statements about the periplasmic space are true except _________ -
Answers - it is found only in Gram-positive bacteria
The term used to describe bacteria that are shaped like curved rods is _________ -
Answers - vibrio
Which of the following is not true about archaeal ribosomes? - Answers - They have
similar antibiotic sensitivities to those of bacteria.
Rigid bacteria with a helical cell shape are called _________ - Answers - spirilla
Proteins are synthesized on structures called _________ - Answers - ribosomes
Which of the following diseases is (are) caused by prions?
Scrapie
Mad cow disease
Kuru and Creutzfeldt-Jakob Disease
All of the choices are correct. - Answers - All of the choices are correct.
The liquid component of the cytoplasm is known as the _________ - Answers - cytosol
Which of the following is a function of the mitochondrion?
Electron transport
All of the choices are correct.
ATP synthesis
Tricarboxylic acid cycle enzyme reactions - Answers - All of the choices are correct.
The Golgi apparatus is responsible for the _________ - Answers - packaging of
materials for excretion
The major site of cell membrane synthesis is the _________ - Answers - endoplasmic
reticulum
Which of the following is useful in distinguishing between bacterial, archaeal, and
eukaryotic cells?
The use of DNA for the storage of genetic information
The presence of membrane-delimited organelles within the cytoplasm
All of the choices are correct.
The presence of ribosomes for the synthesis of proteins - Answers - The presence of
membrane-delimited organelles within the cytoplasm
Which of the following organelles is involved in the modification, packaging, and
secretion of materials? - Answers - Golgi apparatus
