1、 1 mRNA 1 2 1 1. S 2 ( ) A S DNA S B R C S DNA R D S A S DNA S R 2 ) 32 P 35 S T2 ( ) A DNA B 32 P C 35 S D 35 S 32 P B DNA DNA 35 S 35 S 35 S 35 S, 32 P 32 P DNA 32 P 3 1 2 T2 ( ) 1 DNA 2 35 S DNA 3 2 DNA 2 A B C D B 1 32 P 35 S 32 P 1 1 32 P 35 S DNA 2 35 S DNA 35 S 35 S DNA 2 4 ( ) A R S R S B C
2、32 P 35 S D DNA A R S S DNA R S DNA R DNA S R S P 35 S( ) 32 P( DNA) S R S 4 DNA DNA DNA ) DNA ( ) A DNA 15 B DNA C D DNA 1 A DNA 6 A T 3 G C 3 A T 2 G C 3 15 DNA DNA DNA 2 1 6 ) DNA DNA ( ) A DNA DNA B DNA C DNA D 2n DNA n 4 D DNA DNA DNA DNA 2n DNA 4 2n 7 ) DNA ( ) 5 A DNA B DNA C DNA D DNA C DNA
3、8 32 P 31 P DNA m n ( ) A B DNA (2m n) C 14 31 P D DNA 8(m n) C DNA n n 2m 2n 2 m n( ) A T G C DNA (m n n 2m n( ) DNA 16 32 P 2 16 31 P DNA (m n 4 1 8(m n)( ) 9 15 N DNA 14 N 4 (a b c DNA a 15 N b 14 N 15 N c 14 N) DNA ( ) D 15 N DNA 14 N 4 16 DNA DNA 16 DNA 2 DNA 15 N 14 N,14 DNA 14 N 15 N DNA 10 D
4、NA DNA DNA 6 ( ) C DNA (A C)/(T G) 1 (A C)/(T G) (A C)/(T G) (A C)/(T G) 0.5 (A C)/(T G) 2 (A T)/(G C) (A T)/(G C) DNA (A T)/(G C) DNA 11. 32 P DNA 31 P ( ) A 32 P DNA B 32 P DNA C 32 P DNA D 32 P DNA B DNA 32 P DNA DNA 32 P DNA 32 P DNA 12 ) 3 H DNA 3 H ( ) A B DNA C DNA 3 H DNA D DNA 3 H D 1 DNA n
5、 DNA 2 n 7 DNA DNA DNA DNA 3 H DNA DNA 3 H DNA DNA 3 H 13 ) (1) _ (2) _ ( 32 P _( 32 P _ (3) 5 2 5 35 S (NH4) 35 2 SO4 3 _ _ _ _ _ _ (4) _( ) _ _ 2 32 P 35 S 8 (1) (2) 2 32 P (3) 5 ( ) 35 S 3 35 S (4) ( ) 14 1 ( ) 2 DNA (1) 1a A B _ e f _ (2) 1 d _ _ (3) DNA 1 _ DNA 1A B _( ) (4) 2 32 P DNA DNA m T 15% _ 2 DNA (1) 1 A C H O N P B C H O N S C H O N e DNA f RNA DNA RNA 5 A T C G U (2) 9 (3) DNA T2 ( DNA ) 1 e 1A P B S DNA m T 15% DNA (50% m 70%m 0.7 m DNA DNA 0.7m DNA 32 P 31 P 32 P (1)C H O N 5 (2) ( ) (3) e m (1) (2) DNA DNA (3) DNA | 10 T3 T4 1 ( ) DNA S DNA R
