Microbiology

Microbiology, A Systems Approach, Ch. 7 Active Transport - correct answers-Protein carrier -ENERGY IS REQUIRED -Movement against gradient Aerobe - correct answersaerobic organism can use gaseous oxygen in its metabolism and possess the enzymes needed to process toxic oxygen products Aerotolerant Anaerobe - correct answersDo not utilize oxygen but can survive and grow to a limited extent in its presence Anaerobe - correct answersLacks the metabolic enzyme systems for using oxygen in ...

Microbiology, A Systems Approach, Ch. 7 Active Transport - correct answers-Protein carrier -ENERGY IS REQUIRED -Movement against gradient Aerobe - correct answersaerobic organism can use gaseous oxygen in its metabolism and possess the enzymes needed to process toxic oxygen products Aerotolerant Anaerobe - correct answersDo not utilize oxygen but can survive and grow to a limited extent in its presence Anaerobe - correct answersLacks the metabolic enzyme systems for using oxygen in ...

Why was it widely believed, until the late 20th century, that bacterial infections would soon be conquered? Correct Answer-Increased hygiene, nutrition, vaccines, antibiotics allowed control over infectious diseases Why are bacteria once again of major public health concern? Correct Answer-Increase in bacterial infections due to ageing populations, more people with immune suppression, emerging infectious diseases and antibiotic resistance. Name some major worldwide diseases caused or exace...

mRNAs in eukaryotes contain which of the following features? - A methylated guanosine cap at the 5' terminus - A polyadenylate tail at the 3' terminus - Generally contains a single open reading frame, hence monocistronic - Translation initiates at the first AUG - All of the above Correct Answer-All of the above Which of the following statements concerning mRNA and translation in prokaryotes is false? - As in eukaryotes, mature mRNA of prokaryotes is first transcribed as a precursor m...

Naked Virus Correct Answer-A virus without an enclosing envelope, consisting only of a nucleocapsid Capsid Correct Answer-The protein shell of a virus that encloses its genetic material Icosahedral Symmetry Correct Answer-Is a limited (closed) structure and allows packaging of only limited genome sizes Quasi-Equivalence Correct Answer-The relationships between capsid proteins structures are similar but not identical Haemagglutination Correct Answer-Is a specific form of agglutination...

where do T cells develop? Correct Answer-thymus where do all immune cells come from? Correct Answer-bone marrow where do b cells develop? Correct Answer-bone marrow what do monocytes develop into? Correct Answer-macrophages where do PMNs develop? Correct Answer-bone marrow What is a PMN? Correct Answer-polymorphonuclear neutrophil, first response to infection, acute what are examples of secondary lymphoid organs? Correct Answer-spleen and lymph nodes what are the two types o...

Prokaryote Correct Answer--No nucleus -Divide by binary fission -Unicellular and lack organelles Eukaryotes Correct Answer--Found in animals, plants, fungi, protozoa -Contain organelles that perform useful functions Microbiology Correct Answer-Branch of science that deals with microorganisms Virology Correct Answer-the study of viruses Mycology Correct Answer-The study of fungi and yeasts Parasitology Correct Answer-the study of worms, protozoan and amoeba (parasites) Bacter...

What microbes can degrade and/or utilize every molecule on earth? Correct Answer-bacteria and archaea What is botulism used for? Correct Answer-medicine (is a very potent toxin; is a paralytic) How do we identify new bacteria? Correct Answer-by sequence analysis of universal genes (i.e. with rRNA) What is a process that is preserved between cells? Why? Correct Answer-translation of ribosomes; it is a complex process with lots of restraints on mutations (i.e. genes mutate very slowly) ...

Which of the following family of viruses have DNA genomes Correct Answer-Hepadnaviridae The single stranded negative strand RNA of a virus Correct Answer-must be converted to positive strand RNA in order to be translated into proteins The distinction between a prion and a virus is that Correct Answer-A prion is a single protein molecule whereas a virus may contain many copies of one or several proteins The Pasteur Swan Neck flask experiment shows that Correct Answer-microorganisms are p...

What is an immune system? Correct Answer-interconnected system of lymphoid organs, tissues, cells and cell soluble products Roles of the immune system (4) Correct Answer-- recognize - neutralize - control - eliminate Innate immunity (5) Correct Answer-- from differentiation of myeloid and lymphoid stem cells - nonspecific responses - present at birth - doesn't retain memory - non-adaptive Components of the innate immune system (3) Correct Answer-- Physical barriers - Chemical b...