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BIO 210 SFSU EXAM WITH 100%
CORRECT ANSWERS 2025 GRADED
A+
Which of the following may be found in viruses selct all that apply ( correct answers ) RNA or DNA & envelope with spike glycoproteins In a daycare setting, which of the following options would provide the best protection for a child who cannot be vaccinated for influenza ( correct answers ) Vaccination of the other children in the daycare and the dayears staff match the macromolecule with its building block - ( correct answers ) lipds - fatty acid and glycerol Proteins - amino acid nucleic acids - nucleotides Carbohydrates- monosaccharides
oxygen is found in which of these macromolecules SELECT ALL THAT APPLY ( correct answers ) Proteins, lipids, nucleic acids (DNA, RNA), carbohydrates If an organism needs to move water across a membrane it will need to use blank ( correct answers ) osmosis Many foods are naturally preserved with high salt content (like beef jerky for example). This creates a hypertonic environment. What happens to any bacteria that might contaminate these types of foods? ( correct answers ) bacteria lose water shrink and die LOOK AT VIDEO QUESTION 10 - which of the statements below are true ( correct answers ) this picture represents a decomposition reaction & if a competitive inhibitor binds to B then D won't be formed When you bake sourdough bread, yeast carries out fermentation and produces the dough. ( correct answers ) carbon dioxide
You put a banana peel in a plastic baggie and add some dirt from your garden to it. After sealing the baggie you set it aside for a few weeks. In another plastic baggie you put a banana peel, but don't add any dirt. You seal this baggie and set it aside for a few weeks too. When you observe the two baggies after a few weeks, you notice that one with the dirt has started to inflate and has bubbles in it! The banana also seems to have broken down much more in the baggie with the dirt compared to the baggie without dirt. Which statement explains what is going on? ( correct answers ) Microbes in the dirt are breaking down the banana peel through catabolic processes. The bubbles/inflation reflect the production of carbon dioxide gas, If you examined the cells of someone who had cyanide poisoning, what would you expect to find, knowing that cyanide disrupts an important part of the electron transport chain? ( correct answers ) low ATP levels in the mitochondria You discovered a new bacterium which is an obligate (strict) anaerobe. If a patient has an infection on his foot caused by this organism, which of these might be a good treatment option? ( correct answers ) a hyperbaric oxygen chamber
which has a higher than normal amount of oxygen (compared to the air) If you start out with 20 bacterial cells en your sandwich and their doubling time is 15 minutes, how many bacteria will be en your sandwich after just ene hour? ( correct answers ) 320 If the template DNA strand contains the sequence 3' AACTGTGAT 5' the corresponding 5'-3' mRNA strand would be.... ( correct answers ) UUGACACUA During DNA replication in bacteria... (select all that apply) ( correct answers ) DNA polymerase adds complementary nucleotides in order according to what is in the original strand
- Each strand of DNA is used as a template to build a complementary strand - DNA replication proceeds s in opposite directions around the circle - a copy of the original double-stranded DNA circle is made Which molecule serves as the "translator" during protein synthesis? ( correct answers ) transfer RNA
An F+ donor cell that conjugates with an F- recipient cell will result in what ( correct answers ) The F- cell becomes F+ and gains a plasmid but its chromosomal DNA does not change Transduction results when... ( correct answers ) • a defective phage packages bacterial DNA instead of viral DNA A patient comes in to your free clinic complaining that she has a bad cold. She asks you to just give her an antibiotic and send her home. When you tell her you can't do that, she asks you to explain why antibiotics don't work for viruses. Which statement below reflects what you will tell her? ( correct answers ) Antibiotics target structures that bacteria have (such as a cell wall) that viruses don't have. What can you do to prevent the spread of antibiotic resistance? (SELECT ALL THAT APPLY) ( correct answers ) Avoid catheters and other intravenous devices if possible - make sure an antibiotic susceptibility test has been done on a clinical isolate of whatever is causing your infection and take the most specific antibiotic at the lowest possible dose- stay
current with your immunizations- do not borrow antibiotics from someone else- finish the complete course of antibiotics prescribed by a doctor - do not eat meat from animals treated with antibiotics - observe good hand hygiene practices- Stop antibiotics if they are not necessary Antibiotic-resistant infections may be caused by bacteria that can..... (select ALL THAT AppLY) ( correct answers ) produce molecules in their cell walls that can pump out the antibiotic, produce changes to surface proteins so the antibiotic cannot get inside, produce enzymes that cut up the antibiotic, form communities like biofilms which make it difficult for antibiotics to penetrate and destroy individual bacteria An example of "vehicle" transmission is getting a disease after ( correct answers ) eating a burrito made with contaminated lettuce If "Microbe X" has high virulence, a low infectious dose (I.D.) and enters through the correct portal of entry, who is most at risk for getting sick from this microbe? ( correct answers ) someone who is recovering from chemotherapy and has never been exposed to Microbe X
