Concept explainers
(a)
To determine:
Do the bacteria in the probiotics survive through the mouth, stomach and small and large intestine.
Concept introduction:
Probiotics are live microbes like bacteria and yeast that are taken as supplements to boost ones health. They improve the natural biota of bacteria in the human gut and also improve the functioning of the
(b)
To determine:
Do probiotics promote health.
Concept introduction:
Probiotics are live microbes like bacteria and yeast that are taken as supplements to boost ones health. They improve the natural biota of bacteria in the human gut and also improve the functioning of the digestive system. They are known to improve the immune system too.
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
BIO 102 General Biology II Updated Edition (Tidewater Community College)
- 25) Identify the most correct choice: a) ribosomes are the membrane bound organelles responsible for making proteins from RNAs. b) In gene therapy, Agrobacterium is the bacteria that transfers genetic material into the human cells that contain the mutated gene. c) spectrophotometer analysis can be used to detect the concentration of the dead cells in a solution only and not those that are living. d) None of the above.arrow_forwardIn Kornberg’s initial experiments, it was rumored that he grew E. coli in Anheuser-Busch beer vats. (Kornberg was working at Washington University in St. Louis.) Why do you think this might have been helpful to the experiment?arrow_forwarda)List and describe the purpose of each component of the restriction enzyme digest. b)Why do some tubes have no restriction enzyme?arrow_forward
- A. Hank is going to talk about Gene Guns and Agrobacterium which I will discuss in a video lecture next week. B. How long does it take to develop and bring a GMO crop to market? C. What are some of the drawbacks to GE organisms? D.One of the interviewees is a woman in bright pink t-shirt and she is trying to describe drawbacks to GMOs. While not a cogent argument, I think there is an important point that she is trying to make. Do you know what she is trying to say?arrow_forwardThe following statements refer to genetically-modified (GM) organisms. Which of the following statements (A-D) are TRUE? Choose all that are TRUE, or choose "None of the other statements are true" a) GM insects have never been intentionally released into the wild b) None of the other statements are true c) GM organisms are banned in the U.S. d) GM crops have been proven to be less nutritious than organic crops, and have been shown to increase cancer risk in people who eat them e) Since the time that glyphosate-tolerant crops were introduced (mid-1990’s), no glyphosate-resistant weeds have emergedarrow_forwardBacterial species that are harmful, as well as others that are beneficial, are found living in the human body. To slow the rate of developing antibiotic resistance in bacteria, physicians are being encouraged to use "narrow-spectrum" antibiotics- those that target only a few bacterial types. How can the information learned by antibiotic sensitivity testing be used by physicians who must choose antibiotics that inhibit the growth of bacteria causing disease but that do not interfere with beneficial bacteria?arrow_forward
- A recent study found that 480 Streptomyces strains freshly isolated from the soil are resistant to at least six different antibiotics. In fact, some isolates are resistant to 20 different antibiotic drugs.Why do you think these bacteria (which are neither pathogenic nor exposed to human use of antibiotics) are resistant to so many drugs? What might be the implications for human bacterial pathogens?arrow_forwardResults from a Kirby Bauer antibiotic assay on a Gram-negative bacterial culture are described as follows: A) the bacterium is resistant to penicillin, an antibiotic that targets synthesis of the peptidoglycan cell wall and B) the bacterium is resistant to tetracycline, an antibiotic that targets the small subunit of the ribosome, inhibiting protein synthesis. Which of the results represents intrinsic resistant and which represents acquired resistants?arrow_forwardA 65 year old patient undergoes a hernia repair surgery. He receives a polypropylene mesh implant that prevents hernia recurrence. The healing goes well, but four weeks after the surgery he develops fever and sense of discomfort at the surgery site. On a physical examination, there is skin redness and fluctuating mass (palpable mass filled with fluid) around the incision. The doctor suspects that mesh got infected and plans mesh removal surgery. 1) Describe the sequence of local events during wound healing after the implantation of the mesh. For each of the stages of the wound healing process, specify cells that are involved, their role(s), signal molecules that are involved, and their roles.arrow_forward
- Humans perfected the use of recombinant DNA technology to produce human insulin from bacteria. Outline steps in this process of using E. coli as to host cells.arrow_forwardImagine that you are a student in Alfred Hershey and Martha Chase’s lab in the late 1940s. You are given five test tubes containing E. coli bacteria infected with T2 bacteriophages that have been labeled with either 32P or 35S. Unfortunately, you forget to mark the tubes and are now uncertain about which were labeled with 32P and which with 35S. You place the contents of each tube in a blender and turn it on for a few seconds to shear off the phage protein coats. You then centrifuge the contents to separate the protein coats and the cells. You check for the presence of radioactivity and obtain the following results. Which tubes contained E. coli infected with 32P-labeled phage? Explain your answer. Tube number Radioactivity present in 1 Cells 2 Protein coats 3 Protein coats 4 Cells 5 Cellsarrow_forwardImagine that you are a student in Alfred Hershey and Martha Chase’s lab in the late 1940s. You are given five test tubes containing E. coli bacteria infected with T2 bacteriophages that have been labeled with either 32P or 35S. Unfortunately, you forget to mark the tubes and are now uncertain about which were labeled with 32P and which with 35S. You place the contents of each tube in a blender and turn it on for a few seconds to shear off the phage protein coats. You then centrifuge the contents to separate the protein coats and the cells. You check for thepresence of radioactivity and obtain the following results. Which tubes contained E. coli infected with 32P-labeled phage? Explain your answer.arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education