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【单选题】
Based on the naming rules, the first letter of a restriction endonuclease means（ ）
A.
Bacterial strain
B.
Bacterial species
C.
Bacterial genus
D.
Identified order
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】The mechanisms of tumor suppressor gene inactivation include（ ）
A.
hypermethylation
B.
Mutation
C.
Loss of heterozygosity
D.
Obtaining new promoter or enhancer
【单选题】In the regulation of lac operon, when the medium contains both glucose and lactose, which statement is true?（ ）
A.
repressor is active; CAP is inactive
B.
both repressor and CAP are active
C.
repressor is inactive; CAP is active
D.
both repressor and CAP are inactive
【多选题】Which are right about molecular hybridization?（ ）
A.
The hybrid molecules must be single
B.
Hybrid molecules must be completely base pairing
C.
Can only hybridization between DNA and RNA
D.
From the understanding of DNA denaturation and renaturation phenomenon
【多选题】The physiological characteristics of myocardium include（ ）
A.
Conductivity
B.
Autorhythmicity
C.
Contractility
D.
Excitability
E.
Extension
【判断题】RNA Pol II is the enzyme synthesizing hnRNA in eukaryotes. It is not susceptible to amanitin.（ ）
A.
正确
B.
错误
【单选题】Isocaudarner presents（ ）
A.
Various restriction endonucleases recognize same palindrome, but cut at identical site
B.
Various restriction endonucleases recognize different palindromes, but produce same sticky ends
C.
Various restriction endonucleases recognize same palindrome, but cut at different site
D.
Various restriction endonucleases recognize same palindromes, and produce same sticky ends