Holmes and Watson had apprehended three people on suspicion of shop lifting. The three, a man, a woman and a boy, were interviewed by inspector Lestrade at Scotland Yard. During the interview it became clear that the man was three times as old as the boy and twice as old as the woman. The ages of all three added together is 88 years.
How old is each?
James Watson是()之父。
Non-Watson-Crickbasepairing非沃森-克里克碱基配对
1953年Watson和Crick提出()。
根据Watson-Crick模型,求每一微米DNA双螺旋含核苷酸的平均数是()。
A:Good morning. Phil Watson's office. B:()
DNA双螺旋模型的主要特征是,一条链上的碱基与另一条链上的碱基在同一个平面上配对。Watson和Crick提出,腺嘌呤只与胸嘧啶配对,鸟嘌呤只与胞嘧啶配对。出于什么样的结构考虑,使他们确定这样的配对方案?
为什么科学界将Watson和Crick提出DNA双螺旋结构模型评为20世纪自然科学最伟大的成就之一?
Watson和Crick提出的双螺旋结构称为( )。
PCR反应中,引物1又称Watson引物,与引物1互补的寡核苷酸链是()。