Question

In: Biology

Please answer 1-7 Bacteria such as E. coli and Salmonella produce invasins that affect the host’s...

Please answer 1-7

  1. Bacteria such as E. coli and Salmonella produce invasins that affect the host’s cells, thus causing the host cells to __________.

    release tumor necrosis factors (TNFs)

    produce iron-binding proteins

    engulf the bacterial cell

    destroy the bacterium

  1. What are interleukins and interferons?

    antibodies

    antigens

    cytokines

    bacterial toxins

  1. Which of these permanently colonize the host through most of its life?

    normal microbiota

    transient microbiota

    alien microbiota

    none of these

  1. Which statement about nosocomial infections is false?

    they occur in compromised patients

    they may be caused by drug-resistant bacteria

    they are caused by microbes living inside of the medical facility

    the patient had the infection prior to hospitalization

  1. Endotoxins are __________.

    associated with gram-positive bacteria

    are generally more potent than exotoxins

    associated with gram-negative bacteria

    actively excreted by living cells

  1. Ergot toxin, Aflatoxin, and other types of mycotoxins are produced by ________.

    viruses

    bacteria

    fungi

    helminthes

  1. Which of these is a portal of microbial entry into humans?

    mucous membranes

    skin

    parenteral routes   

    all of these are correct

Solutions

Expert Solution

Bacteria such as E. coli and Salmonella produce invasins that affect the host’s cells, thus causing the host cells to __________.

Correct option: release tumor necrosis factors (TNFs)

This is the correct option because invasin causes host cell to induce inflammatory response by producing TNF alpha cytokine

What are interleukins and interferons?

Correct option: cytokines

This is the correct option because interleukins and interferons are type of cytokines.

Which of these permanently colonize the host through most of its life?

Correct option: normal microbiota

This is the correct option because normal microbiota permanently colonize in the gut of host.

Which statement about nosocomial infections is false?

Correct option: the patient had the infection prior to hospitalization

This is the false statement because the nosocomial infection is caused in hospital environment due to medical devices in the hospital or due to antibiotic-resistant pathogen in immune-compromised patients.

Endotoxins are __________.

Correct option: associated with gram-negative bacteria

This is the correct option because endotoxin is secreted by gram-negative bacteria.

Ergot toxin, Aflatoxin, and other types of mycotoxins are produced by ________.

Correct option: Fungi

This is the correct option because Ergot toxin, Aflatoxin, and other types of mycotoxins is produced by fungi (moulds)

Which of these is a portal of microbial entry into humans?

Correct option: all of these are correct

This is the correct option because microbes can enter through parenteral route due to wound injury or insect bite, skin or mucous membrane.

gladiator answered 1 year ago
Next > < Previous

Related Solutions

Researchers grew populations of identical Escherichia coli (E. coli) bacteria in a growth medium that contained...
Researchers grew populations of identical Escherichia coli (E. coli) bacteria in a growth medium that contained a low concentration of glucose and a high concentration of citrate, a substance that is not typically consumed by E. coli. For thousands of generations, the bacteria used only glucose as an energy source and grew relatively slowly (and to a low density because of the low concentration of glucose). After about 30,000 generations, one population emerged that began to rapidly grow to a...
Given a recent outbreak of illness caused by E. coli bacteria, the mayor in a large...
Given a recent outbreak of illness caused by E. coli bacteria, the mayor in a large city is concerned that some of his restaurant inspectors are not consistent with their evaluations of a restaurant’s cleanliness. In order to investigate this possibility, the mayor has five restaurant inspectors grade (scale of 0 to 100) the cleanliness of three restaurants. The results are shown in the accompanying table. (You may find it useful to reference the q table.) Inspector Restaurant 1 2...
1. Which environment will enteric bacteria grow best in? Aerobic or Anaerobic? Why? 2. E. coli...
1. Which environment will enteric bacteria grow best in? Aerobic or Anaerobic? Why? 2. E. coli - Are the enterotoxins endotoxins or exotoxins? 3. How will you differentiate between E. coli and Proteus in a lab? 4. Identify two differences and similarities with salmonellosis.
1. You were trying to produce a hydrophilic protein from E coli, but the protein you...
1. You were trying to produce a hydrophilic protein from E coli, but the protein you produced is inactive (misfolded) due to a disulfide bond formed between two cysteine residues that are not found in the native form. Your professor suggests you to co-express this protein with a folding assistant enzyme to improve its activity. (a) Which enzyme is it? (0.4 pt) (b) What are the functions of this enzyme? Please describe two aspects and indicate which sub-form execute which...
The bacteria E. Coli doubles in a little over 20 minutes in good lab conditions. (For...
The bacteria E. Coli doubles in a little over 20 minutes in good lab conditions. (For purposes of this exercise, we will assume it takes exactly 20 minutes.) a) Write a difference equation that models the growth of an E. Coli colony in a large nutrient dish, with an initial population of y0=10000 bacteria, and time measured in increments of 20 minutes. What is the solution to this equation and initial condition? b) How would the equation change if the...
The table shows the estimated number of E. coli bacteria in a lab dish t minutes...
The table shows the estimated number of E. coli bacteria in a lab dish t minutes after the start of an experiment. Time (min) 0 10 20 30 40 50 60 Bacteria 300 423 596 842 1188 1686 2354 A. Using t as the independent variable, find the model that best fits the data. Round values to the nearest thousandths. B. How long does it take the population of E. coli to triple?
E. Coli bacteria were added to 15 petri dishes and they were incubated for 24 hours....
E. Coli bacteria were added to 15 petri dishes and they were incubated for 24 hours. The “soap” dishes contained a solution prepared from ordinary soap; the “control” dishes contained a solution of sterile water. The number of bacteria colonies present in each dish after 24 hours are given below:Soap: 76 27 16 30 26 46 6Control: 30 36 66 21 63 38 35 45The numbers of bacteria colonies in the soap dishes come from a normal distribution with mean...
2. Various enteric bacteria, especially E. coli, are the cause of most urinary tract infections in...
2. Various enteric bacteria, especially E. coli, are the cause of most urinary tract infections in humans. A quick test for the presence of these bacteria in urine is to detect nitrite in the urine. Why?
Please answer these questions 1)Factors that affect E-centives decision to raise capital and list on Swiss...
Please answer these questions 1)Factors that affect E-centives decision to raise capital and list on Swiss Exchange's New Market? (2) What contributes to E-centives decision not to list in the US? (3) Advantages and disadvantages of using US GAAP? (4) Preparation of its financial statements using Swiss accounting standards? (5) Does E-centives appear to fit with the profile of New Market Company?
Compare and contrast how the initiation complex is assembled in bacteria (E. coli) and in eukaryotes (budding yeast cells).
Compare and contrast how the initiation complex is assembled in bacteria (E. coli) and in eukaryotes (budding yeast cells). How do the bacterial and budding yeast ribosomes determine which start codon to initiate translation? Include in your description a discussion of the cis-acting elements, trans-acting factors, and energy requirements required for building the initiation complex in each system. The best response for this question will NOT BE A LIST of the requirements. It will clearly COMPARE and CONTRAST this process...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT