MCB3020 Final Exam Study Guide with Complete Solutions
virus - ANSWER - An infectious agent made up of protein, nucleic acids and sometimes a lipid membrane
Viroid - ANSWER - An infectious agent consisting of only RNA
Prion - ANSWER - An infectious agent consisting of only protein
The proper sequence of reagents in the Gram stain procedure is - ANSWER - crystal violet, iodine, ethanol, safranin.
The Gram stains of of a bacterial cell is based on the chemical properties of its - ANSWER - cell wall
True or False: The Gram stain can only be performed on cultures grown in liquid media. - ANSWER - False
After performing a Gram stain of a mixed culture of Gram-positive and Gram-negative cells, you shout: "Oops, I forgot the iodine step!" What would you expect to see if you observed the slide under the microscope? - ANSWER - Pink Gram-positive and pink Gram-negative cells
Acetone can be used as the decolorizer in the Gram stain procedure. - ANSWER - true
Storage inclusion - ANSWER - stores nutrients, energy, metabolic products, building blocks
-carbon -glycogen -amino acids Chemotaxis - ANSWER - the process by which bacteria move toward an attractant or away from a repellent
What is the most common cell wall in most Archaea? - ANSWER - S layer
Antiseptic surgery was pioneered by - ANSWER - Lister
Which of the following is not true about archaeal ribosomes? - ANSWER - They have similar antibiotic sensitivities to those of bacteria.
Unlike members of the Bacteria, most archaeans have linear chromosomes. - ANSWER - false
The concept that living cells can arise from nonliving material - ANSWER - spontaneous generation
Golgi apparatus - ANSWER - Involved in the modification, packaging, and secretion of materials
Rough ER - ANSWER - ER that is dotted with ribosomes and where protein synthesis occur
The nucleolus plays a major role in synthesis of - ANSWER - rRNA
The first of Koch's postulates is - ANSWER - the microorganism must be present in every case of the disease but absent from healthy organisms.
Which of the following cells will be expected to contain the most active lysosomes? - ANSWER - Phagocytosing white blood cell
The enzymes found in the lysosomes were formed in the endoplasmic reticulum. - ANSWER - true
The abnormal form of the protein is designated _________. - ANSWER - PrPSc, normal is PrPc Which of the following bacterial structures are most directly linked to swimming motility in chemotaxis? - ANSWER - flagella
True or False: Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria -
ANSWER - False
Cytosol - ANSWER - liquid component of the cytoplasm
What is useful in distinguishing between prokaryotic and eukaryotic cells? - ANSWER - The presence of membrane-delimited organelles within the cytoplasm
ER - ANSWER - Location for protein synthesis and some protein modifications
which of the following advances best describes that today we maybe experiencing a second golden age of microbiology? - ANSWER - genomic testing
Perisomes - ANSWER - Location for storage of protective compounds that break down lipids and detoxify certain chemicals
function of mitochondria - ANSWER - tricarboxylic acid cycle enzyme reaction, electron transport, ATP synthesis
Lacks linear chromosome and has a peptidoglycan cell wall - ANSWER - Bacteria
Which of the following describes an organism that rarely contains plasmid? - ANSWER - Eukarya
Which acellullar agent/s are composed of nucleic acids only? Check all that apply. - ANSWER - satellite, prion, virus
Which of the following describes an organism that contains 80S ribosomes? - ANSWER - eukarya
virus - ANSWER - An infectious agent made up of protein, nucleic acids and sometimes a lipid membrane
Viroid - ANSWER - An infectious agent consisting of only RNA
Prion - ANSWER - An infectious agent consisting of only protein
The proper sequence of reagents in the Gram stain procedure is - ANSWER - crystal violet, iodine, ethanol, safranin.
The Gram stains of of a bacterial cell is based on the chemical properties of its - ANSWER - cell wall
True or False: The Gram stain can only be performed on cultures grown in liquid media. - ANSWER - False
After performing a Gram stain of a mixed culture of Gram-positive and Gram-negative cells, you shout: "Oops, I forgot the iodine step!" What would you expect to see if you observed the slide under the microscope? - ANSWER - Pink Gram-positive and pink Gram-negative cells
Acetone can be used as the decolorizer in the Gram stain procedure. - ANSWER - true
Storage inclusion - ANSWER - stores nutrients, energy, metabolic products, building blocks
-carbon -glycogen -amino acids Chemotaxis - ANSWER - the process by which bacteria move toward an attractant or away from a repellent
What is the most common cell wall in most Archaea? - ANSWER - S layer
Antiseptic surgery was pioneered by - ANSWER - Lister
Which of the following is not true about archaeal ribosomes? - ANSWER - They have similar antibiotic sensitivities to those of bacteria.
Unlike members of the Bacteria, most archaeans have linear chromosomes. - ANSWER - false
The concept that living cells can arise from nonliving material - ANSWER - spontaneous generation
Golgi apparatus - ANSWER - Involved in the modification, packaging, and secretion of materials
Rough ER - ANSWER - ER that is dotted with ribosomes and where protein synthesis occur
The nucleolus plays a major role in synthesis of - ANSWER - rRNA
The first of Koch's postulates is - ANSWER - the microorganism must be present in every case of the disease but absent from healthy organisms.
Which of the following cells will be expected to contain the most active lysosomes? - ANSWER - Phagocytosing white blood cell
The enzymes found in the lysosomes were formed in the endoplasmic reticulum. - ANSWER - true
The abnormal form of the protein is designated _________. - ANSWER - PrPSc, normal is PrPc Which of the following bacterial structures are most directly linked to swimming motility in chemotaxis? - ANSWER - flagella
True or False: Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria -
ANSWER - False
Cytosol - ANSWER - liquid component of the cytoplasm
What is useful in distinguishing between prokaryotic and eukaryotic cells? - ANSWER - The presence of membrane-delimited organelles within the cytoplasm
ER - ANSWER - Location for protein synthesis and some protein modifications
which of the following advances best describes that today we maybe experiencing a second golden age of microbiology? - ANSWER - genomic testing
Perisomes - ANSWER - Location for storage of protective compounds that break down lipids and detoxify certain chemicals
function of mitochondria - ANSWER - tricarboxylic acid cycle enzyme reaction, electron transport, ATP synthesis
Lacks linear chromosome and has a peptidoglycan cell wall - ANSWER - Bacteria
Which of the following describes an organism that rarely contains plasmid? - ANSWER - Eukarya
Which acellullar agent/s are composed of nucleic acids only? Check all that apply. - ANSWER - satellite, prion, virus
Which of the following describes an organism that contains 80S ribosomes? - ANSWER - eukarya
