DNA molecule does not include:____
A. phosphodiester bond
B. glycosidic bond
C. hydrogen bond
D. disulphide bond
E. Van der Waals' force
查看答案
What is the key component for storage and transmission of genetic information in nucleic acids:____
A. nucleoside
B. pentose
C. phosphate group
D. base sequence
E. pentose-phosphate backbone
Which of the following structure causes the UV absorption of nucleic acids:____
A. The hydrogen bond between purine and pyrimidine
B. The glycosidic bond between base and pentose
C. The phosphoester bond between pentose and phosphate
D. The conjugated double bond between purine and pyrimidine ring
E. The phosphodiester bond between nucleotides
What is the direction of genetic information flow of reverse transcription:____
A. DNA→DNA
B. DNA→RNA
C. RNA→DNA
DNA→protein
E. RNA→RNA
What are the basic components of a nucleic acid:____
A. phosphate and ribose
B. nucleoside and nitrogenous base
C. mononucleotide
D. nitrogenous base
E. deoxynucleoside and base
微信支付 
支付宝支付