Frederick Griffith documented bacterial transformation. Which statement is true concerning his experiments? DNA that was not contained within a live cell caused the death of the host organism. DNA from dead Streptococcus cells entered live cells and altered the live cell's characteristics. The two strains of Streptococcus were visually indistinguishable. Heat treatment of the Streptococcus strains destroyed the DNA molecules.

Who contributed in the field of microbiology? Each name should only be used once. Developed vaccine against smallpox [ Choose ] Discovered penicillin [Choose ] Disproved spontaneous generation [ Choose ) Was first to observe bacteria [ Choose ] Proved that microorganisms can cause [ Choose ] disease Was first to observe cells and name them [ Choose ] Described serotypes of streptococci [ Choose] Made first recombinant DNA [ Choose ] Studied regulation of bacterial genes [ Choose]

A wine maker and a molecular biologist who has developed a recombinant vaccine, both claim themselves to be biotechnologist. Who in your opinion is right?

Choose the one answer that fits best. Which of the following statements regarding bacteria is NOT correct?   a. During conjugation, two bacteria exchange genetic information directly via pili   b. Bacterial populations have a higher mutation rate because their DNA Polymerases do not have proofreading capability   c. Bacterial growth by binary fission is exponential and each division usually takes only a couple of hour or less   d. Plasmids carry just a few genes and are replicated independently from the bacterial chromosome   e. Cocci that are arranged in clusters/bunches are called staphylococci

A linear DNA has two sites for a particular restriction enzyme. How may fragments are produced in a complete digestion? Group of answer choices 1 2 4 3

In a campus-wide screen for microbes, you find DNA from the bacterial species that causes the bubonic plague, Yersinia pestis. You take the sample back to the lab, and try to grow (very carefully), but can't culture the organism.  Provide two possible explanations for why you can't grow this sample in the lab.

Which organism would be your first choice for transformation: a bacterium, earthworm, fish or mouse? Describe your reasoning

An antibiotic called ​Wonder Drug​ was used to treat the wounded soldiers of America during World War-II. Name the drug and the scientist who discovered it.

Polymyxins are antibiotics that are used in the treatment of Gram-negative bacterial infections. You are given samples of two different types of bacteria. You are told that Bacteria A is Gram-negative bacteria and Bacteria B is Gram-positive bacteria. Describe, in your own words, how you would confirm the bacterial types.

Which of the following helped show that DNA is the carrier of genetic information? Check all that apply Heat-killed S bacteria can "transform" live R bacteria into a virulent strain. 20 different amino acids are found in proteins, but only 4 different nucleotides are found in DNA Bacteriophage inject DNA, not protein, into the bacteria they infect Mice injected with heat-killed R strains of bacteria die of pneumonia MacBook Pro