NATS 1670 Questions and Answers Already Graded A

NATS 1670 Questions and Answers Already Graded A what ilness caused 3rd world countries life expectancies to decrease? ✔✔AIDS Common illness in 3rd world countries ✔✔HIV Tubercolisis Maleria What is the primary fun ...

NATS 1670 Questions and Answers Already Graded A what ilness caused 3rd world countries life expectancies to decrease? ✔✔AIDS Common illness in 3rd world countries ✔✔HIV Tubercolisis Maleria What is the primary function of microbes ✔✔to break everything down What vitmain do microbes create ✔✔Vitamin K what percentage of infected people does ebola kill? ✔✔90% What influenza kill more people than the war? ✔✔Spanish influenza what percentgae people died from infection in 19th century compared to 20th century ✔✔19th centure - 60% 20th centurey - 6% what are the 3 reaosns infectious diseas will never leave ✔✔1) drug resistant strain 2) outbreaks of existing disease 4) new disease causing agents who uses the most amount of antibiotcs? ✔✔80% of it is used by farmers an example of superbug? ✔✔tuberculosis What is cross resistance? ✔✔Can occur between antibactrial drugs that have similar actions (penicilin and cephalosporins) What features are part of CDC catgory A for bioterrsism agent ✔✔- Easily disseminated transmitted - high mortality - Public panic and social disruption - cost of coping iwht bioterrorism What is the cell theory? ✔✔All living things are composed of cells light microscope ✔✔An optical instrument with lenses that refract (bend) visible light to magnify images of specimens. electron microscope ✔✔microscope that forms an image by focusing beams of electrons onto a specimen Is the head of a phospholipid hydrophilic or hydrophobic? ✔✔hydrophilic and polar Is the tail of a phospholipid hydrophilic or hydrophobic? ✔✔Hydrophobic and non polar signal transduction ✔✔A series of molecular changes that converts a signal on a target cell's surface to a specific response inside the cell. How are mitochondria similar to bacterial cell ✔✔1) double membrane 2) circular DNA 3) genes without introns 4) small ribosomes 5) slimier size to prokaryotic cells how do cells stop replicating? ✔✔Cells are able to have cell - cell recognition ad stop growing when it is touching other cellls can virus make energy? ✔✔no How fast are we copying, dividing, and making protein using the DNA ✔✔at the speed of light What is the process of from DNA to Phenotypes ✔✔DNA - (transcription)- RNA - Translation)- Proteins - Phenotypes What is a rod shaped bacteria called? ✔✔bacillus What is the spiral bacteria called? ✔✔Spirillum (pl. Spirilla) What is the spherical bacteria called? ✔✔coccus What is an example of a rod like bacteria? ✔✔E. coli What is an example of Spiral shaped Bacteria ✔✔Syphilis What type of prokaryotes thrives in below 20C ✔✔psychrophiles What type prokaryote grows best between 20 - 50C ✔✔Mesophiles What type of prokaryote grows best above 50C ✔✔Thermophiles What time of prokaryote grows best at ph of 1-2 (acidic) ✔✔Acidophiles What time of prokaryote grows best at neutral pH ✔✔Nutrophile What time of prokaryote grows best at pH as high as 9 *basic) ✔✔Alkaliphle What time of prokaryote grows best with high salt concentration ✔✔Halophiles What time of prokaryote grows best with absence of key nutrients ✔✔Cyanobacteria What age was the first evidece of life ✔✔3.8 billion years ago There are 3 branches of life in the beggining ✔✔Archae (eg halophole, methanogen) Eukarya bacteria What is yeast? ✔✔-Single celled fungi -Probably evolved from multiceulluar ancestor -Typically produces asexually by cell fission or budding -Facultative anaerobes that => EtOH under anaer cond what is opportunistic infection ✔✔caused by organisms that do not cause disease in healthy hosts What is protozoa ✔✔one-celled animal organisms found in decayed materials and contaminated water Pro (primitive) zoa (animal) Ex. Paramecium, ameba What is a virus? ✔✔smaller than bacteria, cannot reproduce on their own What percentage of our genome is virus ✔✔8%