1. Which base is found only in RNA but not in DNA? A．U B．A C．C D． T
A: A
B: B
C: C
D: D
A: A
B: B
C: C
D: D
举一反三
- DNA和RNA的碱基成分的区别主要为 A: DNA中有T，RNA中有U B: DNA中有A，RNA中有U C: DNA中有A，RNA中有C D: DNA中有U，RNA中有T E: DNA中有G，RNA中有T
- DNA和RNA共同具有的碱基是 ( ) A: a.T B: b.A C: c.U D: d.ψ
- If this is the base sequence of a strand of DNA(A T G C C), what would be the base sequence of the complimentary DNA strand?? U A C G G|A T G C C|A U G C C|T A C G G
- 下列哪种碱基配对最不稳定 A: G/C B: A/T C: A/U D: DNA/RNA E: DNA/DNA
- 核糖体由_____组成 A: Only RNA B: Only proteins C: Only DNA D: RNA and proteins