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【单选题】
一天中最高气温出现在午后2时左右，最低气温出现在：( )。A.
日出前后
B.
午夜12时左右
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皮皮学刷刷变学霸
举一反三
【单选题】A lysogenic bacterium ( ).
A.
Carries a prophage
B.
Causes lysis of other bacteria on contact.
C.
Cannot support the replication of a virulent phage
D.
Is often a human pathogen
E.
Is usually not capable of conjugal genetic transfer
【单选题】Schools should be lively places where individuals are encouraged to _____ to their greatest potential.
A.
accelerate
B.
improve
C.
perform
D.
develop
【多选题】What are wrong statements with respect to lysogen and prophage.
A.
If there is only growth of few lysogens, the E. coli lawn would be turbid
B.
The integrated phage is called as lysogen
C.
The infected bacterial cell is called a prophage
D.
If lysogens won’t be formed, the plaques won’t be clear
【单选题】We will be shown around the ciry: schools, museums, and some other places, _____ other visitors seldom go. [ ]
A.
what
B.
which
C.
where
D.
when
【单选题】Pieces of plasmid or bacterial chromosomal DNA may be mistakenly packaged into the capsid (head) of a bacterial virus. Assuming that no prophage state has existed in the phage production, what is the ...
A.
Conjugation
B.
Lysogeny
C.
Generalized transduction
D.
Specialized transduction
E.
Transformation
【简答题】A．offices B．schools C．cities D．places
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