Choose the correct statement for cosmids（）
A. It can be regarded as almost the same lambda vector
B. Less amount of phage DNA is deleted
Cos packaging sites are left
D. It doesn’t contains a origin of replication
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Which of the following statement is true in case of Reverse transcriptase（）
A. Involved in the replication of bacteriophage
B. Uses RNA as a template
C. Used in complementary DNA cloning
D. Synthesizes DNA from RNA
What are not the functions of a polynucleotide kinase（）
A. Removal of the phosphate group from 5’ end
B. Removal of the phosphate group from 3’ end
C. Addition of phosphate group on 5’ end
D. Addition of phosphate group on 3’ end
Choose the correct statement with respect to lysogen and prophage（）
A. The integrated phage is called as lysogen
B. The infected bacterial cell is called a prophage
C. If there is only growth of few lysogens, the E. coli lawn would be turbid
D. If lysogens won’t be formed, the plaques won’t be clear
Enzymes that remove nucleotides one at a time from the end of a DNA molecule are called（）
A. Ligases
B. Exonucleases
C. Endonucleases
D. Modifying enzymes
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