CMMB 343 Final Exam with complete solutions 2024/2025

CMMB 343 Final Exam How does the microbiome of the human GI tract compare to human genomic cells in the body? (2) 1. approx 1:1 ratio of human cells to microbes (~10 trillion each) 2. The ORFs in the microbiome outnumber the ORFs in our genome 150:1 Define: 1. Microhabitat 2. Microbiota 3. Microbiome 1. Microhabitat -location that supports different microbes (skin, GI tract, etc) -not homologous; skin is a microhabitat but armpit skin different from bicep skin) 2. Microbiota -describes all the microbes in a microhabitat; dysbiosis may assist cancer cells 3. Microbiome -the entire collection of microbiotas in ALL microhabitats Brainpower Read More Which microhabitats are most often dominated by: 1. Gram-positive organisms? 2. Gram-negative organisms? 1. Gram-positive saliva, skin 2. Gram-negative urogenital and gastrointestinal tracts Why do we study the human microbiome? (2) 1. It influences physical development 2. It influences physical health What are the 3 main focuses of research on the human microbiome?