USMLE Step 1 Questions
Quiz-summary
0 of 1 questions completed
Questions:
- 1
Information
USMLE Step 1 Questions
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Molecular Biology 0%
-
Question:
A first-year medical student is new to the lab and wants to know if a well-studied gene is transcribed in the sample of cytoplasmic extracts she is given. Which of the following techniques should she use to quickly find out?
Correct Answer: B. Northern blot
Northern blot employs a hybridization probe (of the gene of interest) to identify complementary RNA sequences. Southern blot is used for hybridization to DNA sequences (which would not tell you anything about expression). Western blot is used for protein identification (not gene expression). Southwestern blot is used to determine proteins that bind to DNA. Column chromatography is used to fractionate extracts based on a number of factors (size, charge, pH, etc.), but won’t identify individual genes.
- 1
- Answered
- Review
-
Question 1 of 1
1. Question
Category: Molecular BiologyA first-year medical student is new to the lab and wants to know if a well-studied gene is transcribed in the sample of cytoplasmic extracts she is given. Which of the following techniques should she use to quickly find out?
Correct
Incorrect
Premium
Step 1 Daily Premium
All Questions
Filter by Category
Randomize Questions
Remove Ads
& more