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Listening Quiz: Kiểm Soát Chất Lượng Cho Giao Thức Chiết Xuất DNA – Advanced Level
Th4 19, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Nhà sinh học (English for Biologist)
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1.
What ratio does Sarah say is ideal for good DNA quality?
A 260/280 ratio between 1.8 and 2.0
C 260/230 ratio between 1.8 and 2.0
D 260/230 ratio below 1.0
B 260/280 ratio above 2.5
Explanation:
Sarah states that a 260/280 ratio between 1.8 and 2.0 is ideal.
2.
What does Sarah say should be consistent across samples?
A DNA purity
C Gel electrophoresis results
D RNA contamination
B DNA concentration
Explanation:
Sarah says, ‘Yes, concentration must be consistent across samples.’
3.
How does Sarah suggest detecting RNA contamination?
C By measuring the DNA length on a gel
B By checking for a 260/280 ratio above 2.0
A By checking for a 260/230 ratio below 2.0
D By comparing extraction batches
Explanation:
Sarah says to look for a 260/230 ratio below 2.0 to detect RNA contamination.
4.
What does gel electrophoresis show, according to Sarah?
B The DNA concentration only
A The purity of the DNA
D The amount of RNA contamination
C The DNA integrity and fragmentation
Explanation:
Sarah says gel electrophoresis shows DNA integrity and fragmentation.
5.
What are Sarah and Daniel mainly discussing?
C How to train new lab assistants
D How to perform gel electrophoresis step by step
B How to improve quality control for a DNA extraction protocol
A How to store DNA samples after extraction
Explanation:
The conversation focuses on improving the DNA extraction protocol by adding quality control checks such as purity, concentration, contamination, and integrity.
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Listening Lesson
Vocabulary Flashcards and Quiz
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Flashcards và Quiz Từ Vựng: Thảo Luận Chiến Lược Đấu Thầu Cho Dự Án Đa Chức Năng – Medium Level
Tiếp theo:
Tiếng Anh Môi trường: Trình Bày Chương Môi Trường Trong Báo Cáo Trách Nhiệm Doanh Nghiệp – Advanced Level
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