ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÏÂͼÊÇijDNA·Ö×ӵľֲ¿½á¹¹Ê¾Òâͼ£¬Çë¾Ýͼ»Ø´ðÏÂÁÐÎÊÌâ¡£
£¨1£©Ð´³öͼÖÐÐòºÅ´ú±íµÄ½á¹¹µÄÖÐÎÄÃû³Æ£º¢Ù_______£¬¢ß______£¬¢à________¡£
£¨2£©¸ÃDNA·Ö×ÓÓ¦ÓÐ__________¸öÓÎÀëµÄÁ×Ëá»ùÍÅ¡£
£¨3£©Èç¹û½«14N±ê¼ÇµÄϸ°ûÅàÑøÔÚ15N±ê¼ÇµÄÍÑÑõºËÜÕËáµÄÅàÑøÒºÖУ¬´ËͼËùʾµÄ__________£¨ÌîͼÖÐÐòºÅ£©Öпɲ⵽15N¡£Èôϸ°ûÔÚ¸ÃÅàÑøÒºÖзÖÁÑËĴΣ¬¸ÃDNA·Ö×ÓÒ²¸´ÖÆËĴΣ¬ÔòµÃµ½µÄ×Ó´úDNA·Ö×ÓÖк¬14NµÄDNA·Ö×Ӻͺ¬15NµÄDNA·Ö×ӵıÈÀýΪ__________¡£
£¨4£©Èô¸ÃDNA·Ö×Ó¹²ÓÐa¸ö¼î»ù£¬ÆäÖÐÏÙàÑßÊÓÐm¸ö£¬Ôò¸ÃDNA·Ö×Ó¸´ÖÆ4´Î£¬ÐèÒªÓÎÀëµÄ°ûà×à¤ÍÑÑõºËÜÕËáÊýΪ________¸ö¡£
¡¾´ð°¸¡¿£¨1£©°ûà×ठÍÑÑõºËÌÇ£¨Îå̼ÌDz»µÃ·Ö£© ÐØÏÙà×à¤ÍÑÑõºËÜÕËᣨдÍÑÑõºËÜÕËá²»µÃ·Ö£©
£¨2£©2 £¨3£©¢Ù¢Ú¢Û¢Ü¢Þ¢à¢á 1¡Ã8 £¨4£©15[£¨1/2£©a£m]
¡¾½âÎö¡¿
ÊÔÌâ·ÖÎö£º£¨1£©Í¼ÖÐÐòºÅ´ú±íµÄ½á¹¹µÄÖÐÎÄÃû³ÆÒÀ´ÎÊÇ¢Ù°ûà×ण¬¢ßÍÑÑõºËÌÇ£¬¢àÐØÏÙà×à¤ÍÑÑõºËÜÕËá¡£
£¨2£©¸ÃDNA·Ö×ÓÿÌõÁ´¾ùº¬1¸öÓÎÀëµÄÁ×Ëá»ùÍÅ£¬¹²º¬ÓÐ2¸öÓÎÀëµÄÁ×Ëá»ùÍÅ¡£
£¨3£©DNA·Ö×ӵļî»ùÖк¬ÓÐNÔªËØ£¬Èç¹û½«14N±ê¼ÇµÄϸ°ûÅàÑøÔÚ15N±ê¼ÇµÄÍÑÑõºËÜÕËáµÄÅàÑøÒºÖУ¬´ËͼËùʾµÄ¢Ù¢Ú¢Û¢Ü¢Þ¢à¢áÖпɲ⵽15N¡£Èôϸ°ûÔÚ¸ÃÅàÑøÒºÖзÖÁÑËĴΣ¬¸ÃDNA·Ö×ÓÒ²¸´ÖÆËĴΣ¬ÔòµÃµ½µÄ×Ó´úDNA·Ö×ÓÖк¬14NµÄDNA·Ö×Ӻͺ¬15NµÄDNA·Ö×ӵıÈÀýΪ1¡Ã8¡£
£¨4£©Èô¸ÃDNA·Ö×Ó¹²ÓÐa¸ö¼î»ù£¬ÆäÖÐÏÙàÑßÊÓÐm¸ö£¬Ôò¸ÃDNA·Ö×Ó¸´ÖÆ4´Î£¬ÐèÒªÓÎÀëµÄ°ûà×à¤ÍÑÑõºËÜÕËáÊýΪ15[£¨1/2£©a£m]¸ö¡£