题目内容

在“DNA的粗提取和鉴定”实验中，甲、乙、丙、丁四个小组除下表中所列处理方法不同外，其他操作步骤均正确，但实验结果却不同。下列有关叙述正确的是 <table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-COLLAPSE: collapse; BORDER-TOP: medium none; BORDER-RIGHT: medium none; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" border="1" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 29.05pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 35.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 29.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt" width="47">组别</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 41.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 29.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="55">实验材料</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 86.4pt; PADDING-RIGHT: 5.4pt; HEIGHT: 29.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="115">提取核物质时加入的溶液</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 102.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 29.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="136">去除杂质时加入的溶液</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 81.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 29.05pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="108">DNA鉴定时加入的试剂</td></tr><tr style="HEIGHT: 17.4pt; mso-yfti-irow: 1"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 35.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="47">甲</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 41.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="55">鸡血</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 86.4pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="115">蒸馏水</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 102.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="136">95%的酒精（30℃）</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 81.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="108">二苯胺</td></tr><tr style="HEIGHT: 16.4pt; mso-yfti-irow: 2"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 35.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="47">乙</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 41.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="55">菜花</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 86.4pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="115">蒸馏水</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 102.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="136">95%的酒精（冷却）</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 81.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.4pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="108">甲基绿</td></tr><tr style="HEIGHT: 14.65pt; mso-yfti-irow: 3"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 35.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 14.65pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="47">丙</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 41.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 14.65pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="55">猪血</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 86.4pt; PADDING-RIGHT: 5.4pt; HEIGHT: 14.65pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="115">蒸馏水</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 102.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 14.65pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="136">95%的酒精（冷却）</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 81.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 14.65pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="108">二苯胺</td></tr><tr style="HEIGHT: 12.95pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 35.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.95pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="47">丁</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 41.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.95pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="55">鸡血</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 86.4pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.95pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="115">蒸馏水</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 102.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.95pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="136">95%的酒精（冷却）</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 81.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.95pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-alt: solid windowtext .5pt" width="108">二苯胺</td></tr></tbody></table>

2024-07-04

A.实验材料选择错误的组别是丙

B.沸水浴后试管中溶液颜色变蓝的组别是甲、丁

C.甲组实验现象差的原因是30℃的酒精对DNA的析出效果差

D.乙组实验不成功是因为在鉴定时加入了甲基绿

题目答案

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试卷相关题目

1下列有关试管动物技术的叙述正确的是
A.可以实现良种家畜的快速大量繁殖
B.受精卵移植之前需检查受精状况和发育能力
C.移入受体的供体胚胎的遗传特性在孕育过程中不受影响
D.体外受精主要包括卵母细胞的采集和培养、精子的采集和获能、受精
开始考试点击查看答案
2下列关于造成相关实验失败的原因分析中，错误的是
A.制作腐乳时，盐加的量较多，造成豆腐腐败变质
B.制备固定化酵母细胞时，加热太快，使海藻酸钠焦糊
C.制作果醋时，通氧不足，造成发酵失败
D.用加酶洗衣粉洗涤污渍时，浸泡时间不足，造成洗涤效果差
开始考试点击查看答案
3下列关于固定化酶和固定化细胞的叙述，正确的是
A.固定化细胞技术在多步连续催化反应方面优势明显，并提高了反应速率
B.用包埋法固定细胞，可采用琼脂糖、海藻酸钠、明胶等不溶于水的多孔性载体
C.利用固定化酶降解水体中有机磷农药，需适宜的温度、pH、营养条件
D.固定化细胞可在反应物为大分子物质的反应中发挥作用
开始考试点击查看答案
4用固定化酵母细胞发酵葡萄糖溶液时发现无酒精产生，原因不可能是
A.发酵瓶内通气良好
B.瓶内氧气不足，无氧呼吸产生乳酸
C.凝胶珠内可能没有酵母细胞
D.溶化后的海藻酸钠未冷却即与酵母细胞混合
开始考试点击查看答案
5下表细胞工程技术应用中各组所选择的实验材料及材料特点与实验目的配置错误的是 <table style="BORDER-COLLAPSE: collapse; MARGIN-LEFT: 10.6pt; mso-table-layout-alt: fixed; mso-padding-alt: 0cm 0cm 0cm 0cm" border="0" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 14.05pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 29.55pt; PADDING-RIGHT: 0cm; HEIGHT: 14.05pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" width="39">组别</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 128.5pt; PADDING-RIGHT: 0cm; HEIGHT: 14.05pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" width="171">实验目的</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 100.75pt; PADDING-RIGHT: 0cm; HEIGHT: 14.05pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" width="134">实验材料</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 156.8pt; PADDING-RIGHT: 0cm; HEIGHT: 14.05pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" width="209">材料特点</td></tr><tr style="HEIGHT: 15.05pt; mso-yfti-irow: 1"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 29.55pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" width="39">1</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 128.5pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="171">克隆高产奶牛</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 100.75pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="134">传代10代以内的细胞</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 156.8pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="209">能保持细胞正常的二倍体核型</td></tr><tr style="HEIGHT: 15.05pt; mso-yfti-irow: 2"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 29.55pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" width="39">2</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 128.5pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="171">培育脱毒草莓</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 100.75pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="134">茎尖</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 156.8pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="209">分裂能力强，易诱发突变</td></tr><tr style="HEIGHT: 15.05pt; mso-yfti-irow: 3"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 29.55pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" width="39">3</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 128.5pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="171">培育番茄-马铃薯超级杂种</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 100.75pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="134">花粉粒</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 156.8pt; PADDING-RIGHT: 0cm; HEIGHT: 15.05pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="209">易于获取，易于组织培养</td></tr><tr style="HEIGHT: 4.35pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 29.55pt; PADDING-RIGHT: 0cm; HEIGHT: 4.35pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" width="39">4</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 128.5pt; PADDING-RIGHT: 0cm; HEIGHT: 4.35pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="171">烧伤患者皮肤细胞移植</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 100.75pt; PADDING-RIGHT: 0cm; HEIGHT: 4.35pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="134">自体皮肤生发层细胞</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 156.8pt; PADDING-RIGHT: 0cm; HEIGHT: 4.35pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt; mso-border-top-alt: solid windowtext 1.0pt" width="209">分裂能力强，且不会引起免疫排斥</td></tr></tbody></table>
A.1和2
B.2和3
C.3和4
D.1和4
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6试管婴儿可以说是现代生物科技的杰出成果，下列对其生物学原理及技术的叙述，不正确的是
A.属于无性生殖
B.应用了细胞工程的技术
C.没有发生基因重组
D.体现高度分化的细胞具有全能性
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7哈佛大学的科学家从怀孕妇女的羊水中提取了干细胞,并在实验室培养后形成了多种人体器官组织，如骨骼、肌肉、肝脏等。下列有关叙述正确的是
A.该研究说明干细胞具有发育的全能性
B.这些干细胞一般来自胎儿脱落的表皮细胞
C.该技术可用于解决移植后免疫排斥的问题
D.这些干细胞可用生理盐水保存，也可进行遗传改造
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