Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
CHAPTER 5 REVIEW VIRUS: pg. 84 & 85 Size Extremely small Need electron microscope to see them Shape Varies Structure Protein coat (outside) DNA (inside) (see drawing) How are viruses different from living cells? (see study sheet 2) Viruses cannot do the 4 life processes Viruses are non living Viruses can not live by themselves How does a Virus infect a host cell? (4 step drawing) Attaches to host cell Virus injects DNA into host Virus DNA reproduces inside host cell Cell bursts open and releases new viruses Virus Diseases: flu, cold, mumps, measles, HIV, common cold, small pox, chicken pox, rabies BACTERIA: pg. 86-92 Shape (see drawings) Bacilli (rod) Spirilla (spiral) Cocci (round) Structure Cell wall Cell membrane Cytoplasm Chromosomes Capsule Protective Slimy membrane around bacteria (see drawing) Flagella Protein fibers that cause bacteria to move in liquid (see drawing) How do bacteria reproduce and how often? By fission, every 20 minutes Aerobe vs. Anaerobe Bacteria Aerobe – need oxygen to break down food Anaerobe – does not need oxygen Ways that bacteria are helpful Breakdown wastes and dead organisms Cleans up water Helps make certain foods: yogurt, cheese Helpful in research Ways that bacteria are harmful Cause disease and sickness Poison foods Pathogens Disease causing virus or bacteria Something that makes you sick (see list of differences) Bacterial diseases Strep throat, ear infections, pneumonia, meningitis Antibiotics Medicine to help fight bacteria Original one was Penicillin Ways to prevent growth of harmful bacteria Wash hands, refrigerate food, freeze food, and throw out bad food VIRUSES AND BACTERIA: (see type 1 writing & notes) How are viruses and bacteria similar? Both: cause disease, reproduce, have DNA and are very small How are viruses and bacteria different? Viruses: needs a host cell to reproduce, are small, are non-living, and are not cells Bacteria: does not need a host cell to reproduce, are cells