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]
Unlike the majority anif)*m z(7f*q/rg roof other DNA polymerases, Taq polymerase, which is used iwge uxspk,wz9 7jbu 07-n +-hkn PCR reactions can withstand high temperatures without d x0-p7 9wnekzbu jkh,gwu7+s- enaturing. Which of the following is a likely source for Taq polymerase?
A. Bacteria living in the Arctic
B. Bacteria from the hot springs in Yellowstone National Park
C. Microorganisms in Siberia's deep permafrost
D. Bacteria found in the undergrowth of rainforests
参考答案: B
本题详细解析:
Taq polymerase was isolated from bacteria found in the hot springs at Yellowstone National Park, USA. This enzyme is able to withstand high temperatures used for PCR assays.
All other choices (Choice A, C and D) describe bacteria living in colder locations compared to hot springs which strongly suggests that enzymes present in these bacteria would not be adapted to higher temperatures.
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