The cI gene of phage is of what type()
A. Inducer
B. Promoter
C. Repressor
D. Silent gene
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根据酶切活性对盐浓度的要求,Ⅱ型限制性核酸内切酶往往可分成()
A. 2 大类
B. 3大类
C. 4大类
D. 5 大类
Which of the following is used to precipitate the nucleic acids()
A. glycerol
B. ethanol
C. methanol
D. ethylene
What is the capsid (protective coat) of the bacteriophage made up of()
A. DNA
B. Protein
C. RNA
D. Organic acids
Which of the following terms is used to describe the type of RNA that functions as an adaptor, linking amino acids with anticodons()
A. Messenger RNA (mRNA)
B. McroRNA(miRNA)
C. Ribosomal RNA (rRNA)
D. Transfer RNA (tRNA)