A lab technician working in a Physical Containment 2 (PC2) laboratory needs to purify a mixed liquid culture of microorganisms. They plan to use the streak plate technique and work aseptically inside a Class II Biological Safety Cabinet (BSCII). Why would the technician chose to work inside work a BSCII rather than streaking the mixed culture onto a plate using aseptic technique on an open bench?单项选择题

A

Working inside a BSCII would be appropriate if the mixed culture contains a pathogen that could be acquired by aerosol inhalation. Working inside the BSCII would contain aerosols protecting the technician from aerosol transmission of the pathogen, as well as preventing contamination of the environment and the microbial culture.

B

Working inside a BSCII allows the technician to protect themselves from exposure to pathogens in the environment.

C

Working inside a BSCII would be appropriate if the mixed culture contains pathogenic microorganisms. Working inside the BSCII would protect the technician from acquiring an infection via direct contact transmission of the pathogen, as well as preventing contamination of the environment and the microbial culture.

D

Working inside a BSCII allows the technician to be better able to protect the purified microbial culture from being contaminated by environmental pathogens.

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

Which biosafety cabinet type is designed to protect both the product and the user from contamination when handling Risk Group 2 microorganisms?

Choose a, b, c or d as the best answer. 2. Which statement about Brutalist buildings would the author, most probably, agree with?

Section A: Read the text and answer the questions. Brutalism is an architectural style, introduced in the 1950s. It uses exposed concrete to create geometric structures with a grey appearance. Concrete buildings are often criticised as cold and ugly, lacking the warmth of stone or the smooth feel of steel. However, concrete, as a building material, has unique characteristics. It is extremely flexible when wet, and is adapted to create interesting shapes. Many urban public buildings, such as universities, have also used concrete as the main material to indicate strength and permanence. Instead of keeping Brutalist buildings, many are being demolished to make space for modern styles. However, this does not acknowledge the cultural history of these buildings, and is not sustainable. Fill in the gap with ONE WORD from the paragraph. 1. Brutalist architecture included exposed concrete, which gave a cold Answer Question 1[input] .

Question 30 Choose a, b, c or d as the best answer. The author’s main argument is that the 100:80:100 model __________.

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！