The Antibiotic Decrease Yeast Cells Francine Rodriguez Biology 1401 Lab section Department of Biology, The University of Texas-Pan American March 8, 2013 Abstract: The main focus in this experiment was to find out antibiotics affect yeast cell cultures in a controlled environment. We imagined we owned a business in which a part of the business is to grow yeast (Saccharomyces cerevesiae) to be distributed as dry yeast for bakeries and breweries. Profits depend rapid, economical production a large number of yeast cells. We had observed that there is apparent difference in the yield of yeast cell when it comes in contact of an antibiotic. It appeared that that antibiotic had decreased the number of yeast cells.
Robert Hook is famous for his significant accomplishment in biology. Specifically he discovered and named one of the most commonly used terms in biology — "cell”. The first cells he saw were dead cork cells. He called them cells because they reminded him of the small, closely packed rooms monks sleep in. In addition, Hook devised one of the best microscopes of his time – the worlds first compound microscope complete with iris diaphragm and illumination.
2 3 4. Write the polynomial 6x − 9x + 3 in standard form. 3 5. Write 4x2(–2x2 + 5x3) in
4. Also it helps the students to understand how yeast works and reacts to different chemicals. * Is important to shake the yeast suspension just before you add some to the test tube because all the yeast is in the bottom and you need to get it to the top to get them to the tube. * My graph shows that the amount of food and the activity of yeast were different because we put different amount of yeast. * The test tube should be set up in exactly the same way except for the differences amount of molasses because if not they would be a different result in the lab.
MODEL ANSWERS FOR AQA BIOLOGY UNIT 1- BIOLOGY AND DISEASE June 2014 9 a. Explain why Maltase only breaks down Maltose, How does enzymes allow reactions to occur at body temperature? (5 marks) * Active site Specific to substrate-Complementary (Enzyme and Substrate) * Enzyme Substrate complex * Specific Amino Acid structure/ Primary Structure * Specific Tertiary Structure * Lowers activation energy * Reaction requires less energy for hydrolysis * Idea Biological catalyst/Not used up in reaction/Remains the same at the end of Reaction b. Explain in terms of the effect on enzymes how Competitive and Non-competitive inhibitors effect the enzymes (5 mark) * Competitive inhibitor similar shape to substrate * Blocks/Bound to Active site / Substrate can't bind * Enzyme substrate complex * Fewer Enzyme substrate complexes formed / Reduced products formed- example accepted e.g. Maltose --->2* Glucose / Reduced rate of reaction (Hydrolysis) * Non Competitive binds to site other than active site * Conformational change in shape of active site * Bonding breaks/ change shape / rearrange e.g.
The sexually transmissible disease gonorrhea has become increasingly resistant to treatment with antibiotics. What is the most likely scientific explanation? a) The gonorrhea bacteria learned to avoid antibiotics b) The gonorrhea bacteria changed their genes when they sensed antibiotics c) Antibiotic-sensitive gonorrhea bacteria died out, but antibiotic-resistant gonorrhea bacteria have flourished and persisted d) The antibiotic increased the mutation rate in the gonorrhea bacteria e) Both b and d 26. Which statement best describes the relationship between plants and animals on earth? a) Plants produce O2 and sugars from CO2 b) Animals produce CO2 and H2O from sugars and O2 c) Plants produce O2 and sugars and animals produce CO2 and H2O d) Animals produce O2 and sugars and plants produce CO2 and H2 27.
1,054,848 c. 1,405,888 d. 1,045,828 5. Evaluate: 12xy, when x = 8 and y = 11. a. 31 b. 228 c. 1056 d. 188 6. Write
These organelles are believed to have been absorbed in early pre-eukaryotic cells and ultimately developed a symbiotic relationship with the host cell over time. Essentially, mitochondria and chloroplasts are thought to be distant relatives of ancient, free-living prokaryotes, that sometime in the past, they were cells themselves. There is compelling evidence supporting this hypothesis. Bacteria routinely absorb other smaller bacteria and sometimes these are not fully digested. This is one of the main pieces of evidence used to support endosymbiosis.
Sam also researched the Delaware market and knew that brewpubs did not exist there. His research led him to convince the Delaware legislature to make brewpubs legal. Also the location (Rehoboth) was a good location because of the high volume of tourists from the Washington, D.C. area. 2. What research methods would you recommend for Dogfish Brewery today?
High fructose corn syrup causes liver disease, obesity, diabetes, and pancreatic cancer. Although the food and drug administration is still debating whether it will be healthful to ban high fructose corn syrup, it is obvious that banning this will prevent many health issues in Americans