单项选择题

Developing frog embryos treated with anti-fibronectin antibodies

A．Develop normally.( )
B．Stop cell division.
C．Have abnormal cell migration(迁移).
D．Don't exhibit action potentials.
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单项选择题
All of the following are true about antisense RNA except ( )
A．Is complementary to mRNA.
B．Forms double-stranded RNA.
C．Joins with the 30S subunit.
D．Inhibits protein synthesis.
单项选择题
The 5S rRNA differs from the other cellular rRNAs in which of the following ways ( )
A．The genes are located outside the nucleolus(核仁).
B．The genes are transcribed by RNA polymerase III.
C．The promoter region of the 5S rRNA gene is internal to the gene.
D． all of the above
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