Exam (elaborations)
BIOD 171 Lab8 Test Prep exam Q&A
- Course
- BIOD 171
- Institution
- Portage Learning
BIOD 171 Lab8 Test Prep exam Q&A
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Attempt HistoryAttempt Time Score
LATEST Attempt 1 42 minutes 22.25 out of 30
Score for this quiz: 22.25 out of 30
Submitted Jun 2 at 8:44pm
This attempt took 42 minutes. Question 1 pts
The word ‘antigen’ is actually a combination for what two words?
Your Answer:
combination of antibody and gen means which produces . so it means when antigen enters the body produces of antibodies will start
Antibody-generating Question 2 pts
For the ELISA assay depicted below, which step (A-E) first contains only specifically bound antigens (aka a 'pure' population)?
Your Answer:
C
Specifically bound antigens are present in step C. Specific and non-specific antigens are present in B but then the wash step removes the non-specific (unbound) antigens, leaving only the specific population seen in step C. Question 3 pts
What would happen in terms of the colorimetric readout if you forgot to do the wash step
after Step D (above)?This study source was downloaded by 100000834490709 from CourseHero.com on 11-03-2021 08:16:15 GMT -05:00
https://www.coursehero.com/file/96114161/BIOD-171-Lab8-examdocx/This study resource was
shared via CourseHero.com Your Answer:
the unbound secondary antibody will not be washed away, so we may have false positive result
All of the wells would have a dark color. The intensity of the readout is dependent upon the amount of the labeled secondary antibody present in the well. Since the unbound secondary antibody was not washed away, all wells would react equally. Question 4
2..5 pts
A western blot separates proteins based on ______________.
Your Answer:
Size and molecular mass
Size Question 5
2..5 pts
When setting up a western blot, what is the purpose of the blocking step post-transfer?
Your Answer:
it can prevent antibodies from binding to membrane non specifically
Blocking prevents non-specific binding of the antibody—you only want the antibody to bind to its specific target. Question 6
1..5 pts
When developing a western blot what two factors influence the intensity of the band?
Your Answer:
type of membrane , intensity of current supplied
Both the amount of protein loaded as well as the duration (time) of development is directly proportional to band intensity. Question 7
.5 pts
Identify (specific name) given to the region of the western blot indicated by the arrow.This study source was downloaded by 100000834490709 from CourseHero.com on 11-03-2021 08:16:15 GMT -05:00
https://www.coursehero.com/file/96114161/BIOD-171-Lab8-examdocx/This study resource was
shared via CourseHero.com
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