The linkage between nucleotides is
A.2’,-3’ phosphodiester bond;
B.3’,-5’ phosphodiester bond
C.2’,-5’ phosphodiester bond;
D.Hydrogen bond
E.Peptide bond
A.2’,-3’ phosphodiester bond;
B.3’,-5’ phosphodiester bond
C.2’,-5’ phosphodiester bond;
D.Hydrogen bond
E.Peptide bond
A、A. Strong independence;
B、B. High combination of mental and physical labors;
C、C. Variety and complication of objective demands.
D、D. All of above
A、The different outlook of the world.
B、The increasing use of the Internet.
C、The different opinions of current affairs.
D、The rapidly changing world.
A、75
B、50
C、35
D、80
A、H2A, H2B, H3, H4.
B、H1A, H1B, H3, H4.
C、H1A, H2A, H3, H4.
D、H1, H2, H3, H4.
E、H2A, H2B, H1, H2.
A、RNA utilizes uracil (U) in place of thymine (T).
B、RNA has a 2'-OH whereas DNA does not.
C、The nucleotides in DNA are linked 3'-5' by phosphodiester bonds but in RNA they are linked 2'-5'.
D、DNA is usually double stranded and RNA is usually single stranded.
E、There is more RNA than DNA in the cell.
A、The temperature at which half of the maximum absorbance value of DNA at 260nm during heat denaturation
B、The temperature at which maximum absorbance value of DNA at 260nm during heat denaturation
C、The optimum temperature for DNA synthesis
D、High Tm value is related to low G-C content
E、The temperature to form DNA and RNA hybrid molecule
A、Two antiparallel strands
B、Deoxyribose-phosphate frame located outside the strands
C、Two strands are joined by hydrogen bond formed between A-T and G-C
D、Diameter of helix is 2 nm, and 10 bases in each turn
E、Nucleosome is the structure unit of DNA double helix
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