5-bromouracil is an analog of which base?
A: thymine
B: uracil
C: cytosine
D: adenine
A: thymine
B: uracil
C: cytosine
D: adenine
举一反三
- 哪些核苷酸碱基存在于RNA中？ A: adenine, guanine, cytosine, thymine B: adenine, guanine, thymine C: adenine, guanine, cytosine, uracil D: sugar, phosphate and base
- What is Chargaff’s ratio? () A: In any organisms, amount of Adenine is the same as Thymine, amount of Cytosine is the same as Guanine. B: In any organisms, amount of Adenine is the same as Cytosine, amount of Thymine is the same as Guanine. C: In any organisms, amount of Adenine is the same as Guanine, amount of Thymine is the same as Cytosine.
- In DNA molecule, the adenine content is 15%,so the cytosine content is :() A: 0.15 B: 0.3 C: 0.4 D: 0.35 E: 0.07
- If the cytosine content of double helical DNA is 40% of the total bases, the adenine content would be: A: 10% B: 60% C: 40% D: 30% E: 20%
- Which is the modulation and demodulation technology mainly used among the following communication modes? A: Analog channel transmits digital data B: Analog channel transmit analog data C: Digital channel transmit digital data D: Digital channel transmit analog data