WhichofthefollowingstatementsistrueregardingDNAstructure?
A. DNAiscomposedofaminoacids
B. InDNA,purinespairtogetherandpyrimidinespairtogether
C. DNAformsadoublehelix
DNAissingle-stranded
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Which of the following statements about DNA structure is FALSE?
A nucleotide consists of a deoxyribose, a phosphate, and a nitrogenous base.
B. Purines consist of two fused rings; pyrimidines have one ring.
C. The “backbone” of DNA consists of alternating sugar and base components.
DNAtemplatestrandcontainsthefollowingsequence:5’-AGGCTCCAG-3’Whichcomplementary strandcanbemadefromthissequence?
A. 5’- TCCGAGGTC- 3’
B. 5’- UCCGAGGUC-3’
C. 5’-CTGGAGCCT -3’
D. 5’-CUGGAGCCU-3’
DNAtemplatestrandcontainsthefollowingsequence:5’-AGGCTCCAG-3’WhichcomplementaryRNAstrandcanbemadefromthissequence?
A. 5’-UGGCTCCUG-3’
B. 5’-GACCTCGGA-3’
C. 5’-UCCGAGGUC-3’
D. 5’-CUGGAGCCU-3’
分压式偏置单管共射放大电路的发射极旁路电容CE因损坏而断开，则该电路的输入电阻将（）。
A. 增大
B. 减小
C. 不变
D. 不定
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