Micr 2123 Study guides, Class notes & Summaries

MICR 2123 Exam 4 questions and correct answer

What is a pathogen? correct answer A microbial organism that causes disease. What is a commensal organism? correct answer Harmless bacteria that are on our body and can only cause disease if they are accidentally introduced into deeper tissues. Describe the human microbiome. correct answer All the microbes in or on our body. Name the body sites that are most hospitable to bacteria and have their own microbiomes. correct answer Mouth, Respiratory tract, Stomach, Intestines (most hospitab...

MICR 2123 Exam #1 Questions with complete solutions

MICR 2123 Final Okstate Tested Questions & Revised Answers All Updated Lactic acid is a byproduct of _____ and _____ fermentation. - Answer-homolactic and heterolactic During respiration, which step(s) produce(s) NADH starting from pyruvate? - Answer-both PDC and TCA produce NADH If the ETS is halted (i.e. stopped working) during respiration, for example when the cell runs out of an electron acceptor, what would be the other way of recycling the NADH? - Answer-Fermentation The proton ...

MICR 2123 Final Exam Questions with Answers All Updated Nonsense Mutation - Answer-The changed codon now calls for a stop codon, ending the genetic code early. Framshift Mutation - Answer-Most extreme type of mutation. A single base is added or deleted, changing the entire frame after the mistake. Control of Gene Expression: DNA Level - Answer-Most drastic and least reversible. Mutate the gene. Control of Gene Expression: Transcription Level - Answer-Activators and repressors, as we...

Electron beams can not be used to resolve images of objects. T/F? Correct Answer-False In all types of electron microscopy, electrons pass through the specimen. Correct Answer-False This type of light microscopy can be used to view very thin cells or flagella. It does that by using this property of light. Correct Answer-Dark field; Light scattering In this type of microscopy, light is delayed by passing through the sample and so objects look as if they are out of phase. It employs this ...

MICR 2123 Exam 2 Questions with All Answers Revised and Updated Helicase - Answer-An enzyme in DNA replication that "unzips" the two strand by breaking the H bonds. Primase - Answer-An enzyme in DNA replication that lays down a short stretch of complementary RNA. DNA Polymerase - Answer-The star enzyme of DNA replication. Adds the nucleotides to the grown chain, using information from the original strand. Rnase H - Answer-An enzyme in DNA replication that removes the RNA primers....

MICR 2123 Exam Questions & Answers All Revised and Tested Respiration can be defined as completion of metabolism: - Answer-with an Electron Transport System and Terminal Electron Acceptor The greatest amount of reduced NADH is produced during which stage of aerobic respiration? - Answer-TCA cycle The F0F1-ATPase drives which of the following processes in bacteria? - Answer-ATP biosynthesis from ADP and Pi Which of the following food preservation methods can actually lead to sterilizati...

MICR 2123 Exam Questions with Answers Cyanobacteria and green plants both perform oxygen's photosynthesis. In this form of photosynthesis, what is the electron source - Answer-H20 Most haloarchaea are photoeterotrophs: they capture light as an energy source. How do these organism use light - Answer-They use bacteriorhodopsin, a light-powered proton pump What is a common electron source for microbes undergoing lithotrophy - Answer-Ammonia Oxidation is the ___ of electrons, and reducti...