A．A-B-D-E-G

B．A-b-D-F-G

C．A-B-E-G

D．A-B-C-E-G

  A．A=T，G=C B．A+T=G+C C．C=G D．A+G=C+T

  A．A→G  B．G→T  C．C→G  D．T→A

A、任何两个碱基均可随意配对

B、A-C，T-G

C、C-T，A-G

D、A-T，G-C

E、A-T，T-G

A．blocking

B．escaping

C．gauging

D．manifesting

A．A—B—E—G

B．A—C—F—G

C．A—C—D—E—G

D．A—B—D—F—G

A．<1g

B．3g

C．7g

D．1g

E．5g

A．grading

B．rating

C．estimating

D．measuring

A．grading

B．rating

C．estimating

D．measuring

A．avoiding

B．eating

C．smelling

D．drinking