这道题的解题过程是？下图为DNA分子结构模
\u5173\u4e8e\u9ad8\u4e00\u751f\u7269\u7684\u4e00\u9053\u9898\uff0c\u662f\u5173\u4e8eDNA\u5206\u5b50\u7ed3\u6784\u7684\u6211\u89c9\u5f97C\u8bf4\u6cd5\u6709\u95ee\u9898\uff0c\u4e0d\u591f\u4e25\u5bc6\uff0c\u672c\u6765\u662f\u60f3\u8bf4\u6210\u4f60\u5199\u7684\u90a3\u4e2a\u610f\u601d\uff0c\u7ed3\u679c\u8868\u8fbe\u4e0d\u597d\u3002
\u6211\u4eec\u8bbe\u8ba1\u5f15\u7269\u6216\u8005\u8bf4DNA\u7684\u65f6\u5019\u6709\u4e2aGC\u542b\u91cf\uff0c\u5176\u5b9e\u4e5f\u5c31\u662f\u4e2a\u6bd4\u4f8b\u95ee\u9898\uff0c\u5982\u679c\u6240\u4ee5\u65e0\u8bba\u662f\u9898\u4e2d\u7684m\u548cn\u600e\u4e48\u6837\u90fd\u4e0d\u4f1a\u5927\u4e8e1\uff0c\u6309\u8fd9\u6837\u7406\u89e3\u7684\u8bdd\uff0cC\u9009\u9879\u80af\u5b9a\u4e0d\u6b63\u786e\u3002
\u4e3e\u4e2a\u6700\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u5982\u679c\u4e00\u6761\u94fe\u4e3aAGCG\uff0c\u90a3\u4e48A+G\u542b\u91cf\u4e3a75%\uff0c\u53e6\u4e00\u6761\u94fe\u4e3a3\u2018-5\u2019\u4e3aTCGC\uff0cA+G\u542b\u91cf\u4e3a25%\uff0c\u4e0d\u662f\u5012\u6570\u5173\u7cfb\u5427\u3002
(1)\u6838\u9178 \u8131\u6c27\u6838\u7cd6\u6838\u9178 DNA \u6838\u7cd6\u6838\u9178 RNA
(2)e\u662f\u6838\u82f7\u9178 e\u662ff\u7684\u5355\u4f53\uff08\u6216\u57fa\u672c\u5355\u4f4d\uff09\uff0cf\u662fe\u7684\u591a\u805a\u4f53 1\u5206\u5b50\u542b\u6c2e\u78b1\u57fa\u30011\u5206\u5b50\u4e94\u78b3\u7cd6\u30011\u5206\u5b50\u78f7\u9178 8\u79cd
(3)a\u7684\u5143\u7d20\u7ec4\u6210\u6ca1\u6709\u5177\u4f53\u56fe\u5206\u6790\u4e0d\u51fa\uff0c\u4f46e\u7684\u7ec4\u6210\u5143\u7d20\u662f\uff1aCHONP f\u662f\u6838\u9178\uff08\u4f46DNA\u8fd8\u662fRNA\u9700\u8981\u4f60\u81ea\u5df1\u5206\u6790\uff0c\u8fd9\u91cc\u6761\u4ef6\u4e0d\u8db3\uff09\uff0c\u67d0\u79cd\u6838\u9178\u5f7b\u5e95\u6c34\u89e3\u5f97\u5230\uff1a4\u79cd\u542b\u6c2e\u78b1\u57fa+1\u79cd\u4e94\u78b3\u7cd6\uff08RNA\u5c31\u662f\u6838\u7cd6\uff0cDNA\u5c31\u662f\u8131\u6c27\u6838\u7cd6\uff09+1\u79cd\u78f7\u9178
| 1．磷酸(基团)；2．脱氧核糖；3．腺嘌呤脱氧核苷酸；4．胞嘧啶；5．胸腺嘧啶；6．碱基对/鸟嘌呤-胞嘧啶碱基对；7．氢键；8．一条脱氧核苷酸链 |
绛旓細鍥炵瓟锛1銆丄 2銆丅
绛旓細璇佹槑锛氳繃D浣DN鈯C锛屽瀭瓒充负N锛岃繛鎺B銆丏C 鍒橠N=DF锛堣骞冲垎绾挎ц川锛夛紝DB=DC锛堢嚎娈靛瀭鐩村钩鍒嗙嚎鎬ц川锛夊張鈭礑F鈯B锛孌N鈯C锛屸埓鈭燚FB=鈭燚NC=90掳锛屽湪Rt鈻矰BF鍜孯t鈻矰CN涓 DB=DC,DF=DN 鈭碦t鈻矰BF鈮孯t鈻矰CN锛圚.L.锛夆埓BF=CN 鍦≧t鈻矰FA鍜孯t鈻矰NA涓 DN=DF,DA=DA(鍏叡杈)鈭碦t鈻矰FA鈮孯t鈻矰NA...
绛旓細Dn = Dn-1 + 1*(-1)^(n+1)*(-1)^(n-1) = Dn-1 + 1 (杩唬)= Dn-2 + 1 + 1 = Dn-2 + 2 = ... (杩唬)= D1 + n-1 = 2 + n-1 = n+1.
绛旓細MN蹇呭瀭鐩村苟绛夊垎DE锛岃DE缁堢偣涓篜銆傛晠DEN涓虹瓑鑵颁笁瑙掑舰涓擡N=DN銆侲NC涓虹洿瑙掍笁瑙掑舰锛屾晠EN骞虫柟=EC骞虫柟+CN骞虫柟锛屽嵆DN骞虫柟=EC骞虫柟+CN骞虫柟锛涘凡鐭C=4锛孌C=8锛涘垯锛8-CN锛夊钩鏂=16+CN骞虫柟锛岃В寰桟N=3锛堝帢绫筹級銆
绛旓細瑙ｆ瀽濡備笅锛Dn锛濓綔1锛媋1 1 銆傘傘1锝 锝1 1锛媋2 銆傘傘1锝 銆傘傘 锝1 1銆傘傘1锛媋n锝滐紝绗竴琛屼箻锛1鍔犲埌鍚勮銆傦紳锝1锛媋1 1 銆傘傘1锝 锝滐紞a1 a2 銆傘傘0锝 銆傘傘 锝滐紞a1 0銆傘傘俛n锝滐紝鎵鏈夌i鍒椾箻a1锛廰i鍔犲埌绗1鍒椼傦紳锝1锛媋1锛嬧垜锛坣锛宨锛2锛夛紙a1锛廰i锛 1 銆傘傘
绛旓細--鎵鏈夎鍔犵1琛屽寲涓轰笂涓夎褰㈠紡 Dn = (x-a)Dn-1 + a(x+a)^(n-1)鑰冭檻鍒癉n鐨勮浆缃鍒楀紡, 寰 Dn = (x+a)Dn-1 - a(x-a)^(n-1)涓ゅ紡娑堝幓Dn-1寰 2aDn = a(x+a)^n + a(x-a)^n 褰揳鈮0鏃舵湁 Dn = (1/2)[(x+a)^n + (x-a)^n]鏄撶煡褰揳=0鏃禗n=x^n, 涓婂紡...
绛旓細瑙ｏ細鈶犫埖DN锛滲M锛孉D锛滱B锛屽垯Rt螖ABM鈮孯t螖ADN 鈭碅M锛滱N锛屸垹BAM锛濃垹NAD锛22.5掳 杩嘇浣淎E鈯N锛屸埓鈭燤AE锛濃垹NAE锛22.5掳锛孧E锛滶N 鈭存槗璇丷t螖ABM鈮孯t螖AEM锛屸埓BM锛滿E 鍚岀悊鍙瘉NE锛滵N锛屾晠DN锛婤M锛滿N
绛旓細(1) 杩濧C浜N涓嶰鐐癸紝褰揃M=DN鏃讹紝鏄撹瘉MN鍨傜洿AC锛孉C骞冲垎鈭燤AN 浠庤屾湁鍥涗釜鐩磋涓夎褰BM銆丄OM銆丄ON銆丄DN鍏ㄧ瓑 鎵浠M=OM=ON=DN, 鎵浠M+DN=MN (2) 濡傚浘锛屽欢闀緾B鍒癊锛屼娇BE=DN锛岃繛鎺E銆傝瘉鏄庯細鈭礎B=AD,鈭燗BE=鈭燚=90掳 鈭粹柍ABE鈮屸柍AND 鈭碅E=AN, 鈭燘AE=鈭燦AD 銆鈭碘垹BAM+鈭燦AD=45掳 ...
绛旓細d1=Z1m=4x20=80mm da1=Z1m+2m=88mm dn=Z1m-2.5m=70mm a=m(Z1+Z2)/2=30x2=60mm
绛旓細濡傚浘
