Which of the following statements best explains why there are fewer colonies on plate IV than on plate III? (a) Plate IV is the positive control. (b) Not all bacterial cells were successfully transformed. (c) The bacteria on plate III did not mutate. (d) The plasmid inhibited bacterial growth. (e) Plate IV is the negative control.

Q: why do the bacteria grow up to the edge of the area with antibiotics, pause, then continue to grow…

A: Option (B) The bacteria mutated as a survival response to the presence of antibiotics, enabling the…

Q: 16) Bacterial DNA replication is said to be: a) Linear b) curvilinear c) circular d) exponential e)…

A: 16) Bacterial DNA replication is said to be circular. This is because bacterial DNA is organized in…

Q: The diffraction limit describes the limitationof light microscopes to distinguish objects less than…

A: Combining image gathering with computationally intensive image analysis can yield a wealth of…

Q: In his work with pneumonia-causing bacteria andmice, Griffith found that(A) the protein coat from…

A: Griffith has conducted experiments on mice by injecting live and dead strains of bacteria inside…

Q: Which statement(s) indicates one or more benefits of electroporation? A.) Possibility of…

A: Electroporation The method of making hybrid DNA in cells.

Q: Why is it important to use a hyperthermophilic DNA polymerase in PCR? a) Because only…

A: PCR polymerase chain reaction is a biotechnology technique used for amplification of DNA.

Q: Griffith's Experiments using Streptococcus pneumonia rough and smooth strains concluded which of the…

A: Streptococcus pneumoniae also known as pneumococcus, is a Gram-positive spherical-shaped bacterium…

Q: Why must a new flu vaccine be manufactured annually? A.) The flu causes mutations in the host cell…

A: Introduction  We are surrounded by various pathogens such as bacteria, viruses, fungus etc. Every…

Q: One therapeutic product now available due to recombinant DNA technology is A) penicillin. B)…

A: Therapeutic products (or pharmaceuticals) are the health products generally used as therapeutic,…

Q: Hana comes from an island town of 2000 people. She goes to the mainland with a friend and there they…

A: Given information  On the island there are 2000 people. Hana returns with a friend from the island…

Q: In order to transform a bacteria, the cell wall should be perforated either through physical or…

A: The cell wall is the very outer membrane of the cell. It has a rigid, semi-permeable protective…

Q: C. In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He…

A: Bacteria are prokaryotic microorganisms very much capable of causing a disease. On the other hand,…

Q: 4) If 20% of a culture of human cells have a DNA content somewhere between 1&2xs (S-phase= 8 hours)…

A: S phase is synthesis phase during which DNA is replicated when the cell is undergoing mitosis.

Q: Assume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you…

A: RNA-dependent RNA polymerase  or RNA polymerase or replicase  is an enzyme that catalyzes the…

Q: (a) Discuss the role of chromosomal islands in microbial diversiIty. (b) State three reasons why…

A: (a) Chromosomal islands are also known as genomic island. They are considered as a genome's part and…

Q: Why can bacteria undergo rapid evolutionary change? a) Bacteria pass through numerous bottlenecks b)…

A: Introduction Bacteria are prokaryotic cells I.e they are single-celled organisms with a small size.…

Q: A Hfr bacterium mates with an F- plasmid containing bacterium. What will be the type of bacteria…

A: High-frequency recombination (Hfr) cell is a bacterium that carries a conjugative plasmid ( F…

Q: When a test tube of bacteria is treated with penicillin and left for two days, the bacteria were…

A: Penicillin belongs to the class of antibiotics known as beta-lactams, which inhibit the synthesis of…

Q: Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause…

A: To find: What do Lysozyme and the antibiotic penicillin cause damage to?

Q: 1)Do you think that public health officials should more directly regulate the availability of…

A: A disease is a specific abnormal disorder that affects the structure or function of any or part of…

Q: QUESTION 2 In the Luria Delbruck experiment, what did the appearance of a bacterial colony on a…

A: Luria–Delbrück experiment  This experiment is also call the Fluctuation Test. This test indicated…

Q: 1. Which of the following bacterial species is not naturally competent? A) Bacillus subtilis B)…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

Q: 38) The following treatment(s) control bacterial growth by damaging the DNA structure of bacteria:…

A: Understanding the development and survival of microorganisms is one of the most fundamental aspects…

Q: Your roommate left the deviled eggs out on the counter for 8 hours, but is happily eating them for…

A: Microbiology is the branch of science that deals with the study of microorganisms that are too small…

Q: Antibiotics can be bactericidal (they kill the microbe) or bacteriostatic (they inhibit microbial…

A: Disk Diffusion Test: The disk diffusion test is a culture-based microbiology assay used in…

Q: (40) Inactivation of which of the following pathogens is appropriate to test autoclave function?…

A: Autoclave is mainly used for sterilization purpose.All the laboratory equipments can be sterilized…

Q: Describe ,A Hfr bacterium mates with an F- plasmid containing bacterium. What

A: PLASMIDS- It was discovered that maleness in bacteria is determined by a transmissible genetic…

Q: 11 Enzyme assay A) Always involves asking a substrate B) Can be very smoke or very complex C)…

A: Enzyme assay  D) A-C are incorrect

Q: The word _________ refers only to living species.a) Clone b) Gene c) Allele d) Vaccine

A: Anything can be considered living if it shows the following characteristics; growth, movement,…

Q: Which of the following is TRUE when one assay bacteriophage titers? You should:   a) first mix the…

A: Bacteriophage titration is a fundamental technique in virology used to quantify the concentration of…

Q: An auxotroph bacterium A could grow only on a medium containing leucine, and an auxotroph bacterium…

A: Auxotrophs are the mutant strain which are not able to grow on minimal media. Such mutant strains…

Q: The percentage of the agarose gel is important because a) it influences the rate of migration of…

A: 1. Agarose gel is widely used for the separation of DNA and RNA molecules and their visualization.…

Q: Gene therapy is the means to treat or even cure genetic and acquired diseases like _____.a) Cancer…

A: The approach in the medical science that aims to cure a disease by the delivery of nucleic acids via…

Q: When Griffith injected mice with a combination of live rough-strain and heat-killed smooth-strain…

A: Frederick Griffith was responsible for conducting an experiment using Streptococcus pneumoniae,…

Q: What else was unexpected in Griffith's experiment? a. )Griffith recovered infectios S train…

A: Transformation and Griffith transforming principle -- In modern science DNA's role in heredity…

Q: Electrophoresis helps to separatea) DNA segmentsb) Cells from DNAc) Tissuesd) RNA from DNA

A: Molecular biology concerns the study of cellular molecules.

Q: When Avery, MacLeod and McCarty used the enzyme __________. No bacterial transformation took place…

A: The Griffith's experiment represent the transformation process that gives us idea about the transfer…

Q: Bacterial species that are harmful, as well as others that are beneficial, are found living in the…

A: Antibiotic sensitivity testing or antibiotic susceptibility testing is the measurement of the…

Q: 6. a) Some phages infecting bacteria possess the enzyme the bacterial cell wall, allowing the viral…

A: Viruses are the obligate parasite. They can replicate in living cells only.

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.