DNA模板链的碱基组成是C=28.5%、 C=12.8%、A=30.6%、T=28.1%，这条链转录成mRNA的碱基组成是
A．A=28.1%、G=12.8%、C= 28.5%、T=30.6%
B．A=28.1%、G=28.5%、C= 12.8%、T=30.6%
C．A=30.6%、G=28.5%、C= 12.8%、U=28.1%
D．A=28.1%、G=28.5%、C= 12.8%、U=30.6%
E．以上都不对
参考答案：D
| 完形填空。 | |||
| Once a neighbor 1George Washington's horse.Washington went with apoliceman to the neighbor'sfarm 2 the horse back.But the neighbor refused 3 the horse back.He said that it was his horse. SuddenlyWashington 4 good idea. He put both of hishands over the eyes of the horse and 5 theneighbor, "If this is your horse, then you 6 tell us in _7 eye he is blind. " "In the right eye," said the neighbor. Washington moved his hand from the righteye of the horse and showed the policeman thatthe horse was not blind in the right eye. "Oh, I made a mistake," said the neighbor. Washington then showed that the horsewas not blind in the left eye,_8 . "I have made 9 mistake," said the neighbor. "Yes," said the policeman, "and you havealso proved(证明) that the horse isn't 10 .You must return it to Mr. Washington. " | |||
| ( )1. A. steals ( )2. A. bring ( )3. A. take ( )4. A. had a ( )5. A. told ( )6. A. may ( )7. A. what ( )8. A. too ( )9. A. another ( )10.A. his | B. stolen B. getting B. to take B. has an B. said to B. must B. that B. also B. other B. you | C. stole C. to get C. to give C. found C. asked C. need C. which C. either C. the other C. your | D. has stolen D. to take D. giving D. had an D. asked to D. had to D. how D. neither D. again D. yours |