Micr 271 - Study guides, Class notes & Summaries

MICR 271 Midterm questions with correct answers

MICR 271 EXAM QUESTIONS WITH ALL REVISED ANSWERS O-Antigen in lipopolysaccharide - Answer-may contain hundreds of repeating units that are species specific - external to the cell, accessible for interactions with immune cells Core in lipopolysaccharide - Answer-formed by an array of sugars including ketodeoxyoctonate - inner core is external to the membrane, but close to the surface of the cell - cross links ionically with other components of the membrane Lipid A in lipopolysaccharide...

MICR 271 TESTED QUESTIONS WITH REVISED ANSWERS – UPDATED!!! How do complements work? - Answer-circulate in blood, inactive, if activated: increased inflammation of local cells enhanced phagocytosis or formation of channel forming complex called membrane attack complex (causes lysis of pathogen), effective against gram negative bacteria (it can pierce outer membrane Distinguish between the different methods natural killer cells use to destroy their cell targets - Answer-kill cells by sec...

3 Domains Correct Answer-1)Archaea 2)Bacteria 3)Eukaryota Endosymbiont Theory Definition Correct Answer-Eukaryotes evolved from prokaryotes based on similarities found between bacteria and mitochondria Microbe Definition Correct Answer-microscopic living organism that may be single celled (prokaryotic) or multicellular (eukaryotic) _____________ is abundant in the atmosphere but only a few species of microbes can use it in this form Correct Answer-Nitrogen The total biomass on Eart...

MICR 271 MIDTERM EXAM QUESTIONS WITH CERTIFIED ANSWERS What is the ability of some viruses to incorporate into the host genome called - Answer-In animal viruses-viral genome integration In bacterial viruses-lysogeny How do viruses exchange genetic material between different species? - Answer-Through viral genome integration, once the virus excises from the host genome it can pick up host genes which can be incorportated into the next host it infects T/F: The origin of viruses is well est...

MICR 271 - Module 1 TESTED QUESTIONS WITH COMPLETE SOLUTIONS What is the virus-first theory? - Answer-Viruses evolved from self-replicating amino-acid structures (ribozymes, which have enzymatic properties) before cells came to be. What is the escape theory? - Answer-Asymmetrical cell division would have allowed for a section of DNA to part from the cell and protected by a protein coat could travel to other cells. There is a theory that viruses evolved from retrotransposons (sections of D...

MICR 271 Midterm questions with correct

MICR 271 Exam Questions| Already Answered| GRADED A+ Three domains of life - ANSWER-Bacteria, Archaea, Eukaryota If a eukaryote has a membrane-enclosed nucleus, a prokaryote has: - ANSWER-a nucleoid, not membrane enclosed If a eukaryote has lysosomes/peroxisomes, a prokaryote has: - ANSWER-not present If a eukaryote has an endoplasmic reticulum/golgi apparatus, a prokaryote has: - ANSWER-not present If a eukaryote has a mitochondria, a prokaryote has: - ANSWER-not present Bacteria - ANSW...

Comprehensive course notes for MICR 271.