78) Which of the following is the longest measure of length? A) 300 um B) 300 nm

Question

78) Which of the following is the longest measure of length?

A) 300 um

B) 300 nm

C) 30,000 nm

D) 0.2 mm ( I think D is the answer)

E) 100,000 nm

83) The average bacteria are which approximate size in diameter?

A) 1 um (I think A is the answer)

B) 10 um

C) 100 nm

D) 100 um

E) 0.1 mm

84) Prions are

A) living organisms

B) noninfectious

C) DNA containing

D) small viruses

E) none of the above (I think E is the answer)

81) Which of the following is the longest measure of length?

A) 50 um

B) 5,000 nm

C) 50,000 nm

D) 0.6 mm (I think D is the answer)

E) 600,001 nm

87) The scientist who developed to the surgical scrub technique was:

A) Alexander Fleming (i think A is the answer)

B) Ignaz Semmelweis

C) Louis Pasteur

D) Anton van Leeuwenhoek

E) Barry Marshalls

Explanation / Answer

87. the scientist who developed surgical scrub technique was louis pasteur (option c)

Human hands are the most important tools for caring. Hands feel, diagnose, cure, prod, and provoke as they are placed upon each patient who is hoping for answers, understanding, and healing remedies. The hands can also be a portal and transmitter of infection. While handwashing may be the simplest way to control infection, it is often not practiced where warranted.

All sterile team members should perform the hand and arm scrub before entering the surgical suite. The basic principle of the scrub is to wash the hands thoroughly, and then to wash from a clean area (the hand) to a less clean area (the arm). A systematic approach to the scrub is an efficient way to ensure proper technique.

There are two methods of scrub procedure. One is a numbered stroke method, in which a certain number of brush strokes are designated for each finger, palm, back of hand, and arm. The alternative method is the timed scrub, and each scrub should last from three to five minutes, depending on facility protocol.

The procedure for the timed five minute scrub consists of:

84. prions are - answer is (option E) none of the above

'Prion' is a term first used to describe the mysterious infectious agent responsible for several neurodegenerative diseases found in mammals, humans. The word itself derives from 'proteinaceous infectious particle' which refers to the initially heretical hypothesis that the infectious agent causing those diseases consists only of protein, with no nucleic acid genome. (All previously known pathogens, such as bacteria and viruses, contain nucleic acids, which enable them to reproduce.) The prion hypothesis - it is the mysterious infectious agent resistant to ultraviolet radiation, which breaks down nucleic acids, but is susceptible to substances that disrupt proteins.

81. the longest measure of lenght is 600001 nm ( option E )

1 micron (µ) is equal 1000 nanometers (nm)

78. the longest measure of lenght is 300 MICROMETER(option A)

83. the average bacteria are of approx size in diameter 1 MICROMETER (option A)

Bacteria are both useful and harmful to humans. Some are used for soil enrichment with plants, in alcohol and cheese fermentation, to decompose organic wastes and clean up toxic waste sites, and in genetic engineering. Others, called pathogens, cause a number of plant and animal diseases including cholera, syphilis, typhoid fever and tetanus. Bacteria are so tiny that hundreds of thousands of them are able to fit into a space the size of the period.

The thousands of species of bacteria are differentiated by many factors, which includes morphology (the shape), chemical composition (usually detected by staining reactions), nutritional requirements, biochemical activities, and source of energy (sunlight or chemicals.)

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