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You have a petri dish containing 2 x 106 cells and you add 2 x 105 pfu of virus to
the dish. What is the multiplicity of infection (MOI)?
Step by step
Solved in 3 steps
- You use 0.1 ml of the stock of virus which you titrated in question #5 to infect 1 million cells. What is the MOI?You have a petri dish containing 1 x 106 adherent cells. You have a vial ofpoliovirus with a concentration of 2.8 x 107 pfu/ml. How much volume of the stockvirus should you add for an MOI of 1.0? MOI means: multiplicity of infectionWhich of the following highly contagious viruses is a single-stranded ribonucleic acid (RNA) virus with a helical capsid and envelope and is transmitted by coming in contact with respiratory secretions? "This is a highly contagious respiratory illness transmitted when an infected person coughs or sneezes virus particles into the air," the health department said in a written statement. "It's so contagious that if one person is sick and spreading measles, nine out of 10 people around them who aren't immune will get it, too." Group of answer choices a. Measles b. Parvovirus c. Coxsackie virus A d. Rhinovirus
- Can Cytomegalovirus (CMV) release any toxicant? What I mean is if the virus perform any kind of chemical rection while inactive like when it is in the environment releasing toxins or when is active inside the host such as inside the human body?A microbiologist obtained two pure biological samples: one of a virus, and the other of a viroid. Unfortunately, the labels had been lost. The microbiologist felt she could distinguish the two by analyzing for the presence or absence of a single molecule. What molecule would she search for and why?Most hospitals use hand sanitizers that claim to “kill 99.99% of illness causing germs”. What are some possible reasons that 0.01% of germs (germs = microorganisms and viruses) not affected by hand sanitizer? (In your answer, you should state what hand sanitizer is made of, and the mechanism by which it kills “germs”.
- A new virus has been determined to triple its population size every 5 hours. The virus is introduced to an environment that is regularly sanitized. The environment is sanitized with 95% effective Clorox every 24 hours. Now imagine there is a strand of this virus that is resistant to the Clorox wiping. If 50 non-resistant bodies and 1 resistant virus body is introduced to the environment, how many hours until the resistant virus population surpasses the non-resistant virus population? (Give as a whole number)Notice the white line indicating a reference for 100 nm. Which 3 viruses have a diameter (width) roughly equal to 100 nm?The culture primarily contains nutrients such as sugars and a gel (agar). Why don’t viruses grow in a culture like bacteria do? Explain.
- Which is the usual order of a viral replication cycle when it is making new virions? O Host recognition > replication > entry > uncoating > release O Uncoating > host recognition > replication > entry > release O Prophase > metaphase > anaphase > telophase > cytokinesis Host recognition > entry > uncoating > replication > release MacBook Air DII DD F11 888 F8 F9 F7 F6 F5 F3 F4 & %24 % 7 8 LO104) ****In case of viral infection and virulence a. If the lethal dose 50/ml for virus A is 103 /ml and for virus B is 102 /ml. then virus A is more virulent than B b. If the lethal dose 50/ml for virus A is 103 /ml and for virus B is 102/ml. then virus A is less infectious than B c. If the lethal dose 50/ml for virus A is 103 /ml and for virus B is 102 /ml. then virus A is more Infectious than B d. If the lethal dose 50/ml for virus A is 103 /ml and for virus B is 102 /ml. then virus B is more virulent than A.Which one of the numbers below is the minimum number of capsomer proteins to make a spherical virus? оооо о 40 Ⓒ50 60 70 80