Continuity and Change D.1 DNA Replication (id: 5393f44a4)

本题目来源于试卷: Continuity and Change D.1 DNA Replication，类别为 IB生物学

[单选题]
A DNA profile was made uie4v g w 6rrt:qlur08)sing DNA from x n*z rq d47*m)lwr+xra crime scene. Locus TH01 was used to identify whether a suspect’s DNA matched the crime scene DNA. The suspect’s two allelzl nr x7m+q4r)xr*wd* es of the gene at Locus TH01 are shown below.


The alleles TH01-6 and TH01-4 were separated and visualised with gel electrophoresis. The resulting gel, with two bands of DNA, is shown below.

What is the DNA in Band B and why is this DNA at this position?

A. TH01-4; smaller fragments travel faster and farther in the gel
B. TH01-4; smaller fragments are more attracted to the negative pole
C. TH01-6; larger fragments travel faster and farther in the gel
D. TH01-6; larger fragments are more attracted to the positive pole


参考答案:  A


本题详细解析:

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