超星 - Unit Test 2

单选题

During DNA cloning which of the following is not a crucial requirement? ____________

A. DNA inserts
B. Vector
C. Protein expression
D. Molecular cutter

单选题

Which of the following statements is correct regarding S1 nuclease? ____________

A.It acts on double stranded DNA
B.It acts on single stranded DNA
C.It acts on both types of strands
D.It is obtained from coli

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单选题

Bal31 is also an enzyme which is used. Which of the following statements hold true in its context? ____________

A. It is having only 3’-5’ exonuclease activity and no endonuclease activity
B. It is having only an endonuclease activity
C. It is having 5’-3’ exonuclease activity
D. It leads to shortening from both the ends

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单选题

Enzyme commonly used for carrying out ligation reaction is ____________

A. Transferase
B.Reverse transciptase
C. Ligase
DNase

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单选题

Which of the following is false about klenow fragment? ____________

A. Polymerization activity
B. 3’→5’ exonuclease activity
C. 5’→3’ exonuclease activity
D. 324 – 928 residue of polymerase I

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单选题

Listen to five dialogues and choose the answer according to the question.

A. Haveaholiday
B. FlytoBeijing.
C. Travelonbusinesswithhim.
D. Preparesomedocuments

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单选题

Listen to five dialogues and choose the answer according to the question.

A. Inacinema
B. Inalibrary.
C. Inastore.
D. .Inabank

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单选题

Listen to five dialogues and choose the answer according to the question.

A. Helikeswatchingfootballgames
B. Helikestravelingwithhisfriends.
C. Hepreferstog0travelingalone.
D. Hepreferstostayathomewithhisfamily.

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单选题

Listen to five dialogues and choose the answer according to the question.

A. Hewantstogetaticket.
B. Hehasfinishedareport.
C. Hecannotgotoseethemovie.
D. Hehasalreadyseenthemovie.

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单选题

Listen to five dialogues and choose the answer according to the question.

A. Shewasmakingaphonecall.
B. Shewasdrivingtotheairport.I1709
C. Shewasworkinginheroffice.
D. Shewashavingameeting.

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