11某种鼠中，黄鼠基因Y对灰鼠基因y为显性，短尾基因T对长尾基因t为显性。且基因Y或t纯合时都能使胚胎致死，这两对基因是独立分配的，现有两只双杂合的黄色短尾鼠交配，理论上所生的子代表现型比例为
A.2∶1
B.9∶3∶3∶1
C.4∶2∶2∶1
D.1∶1∶1∶1
开始考试练习点击查看答案12下列免疫反应中，属于体液免疫反应的是
A.体液中的吞噬细胞吞噬病原体
B.抗体与病菌结合抑制病菌繁殖
C.效应T细胞与靶细胞密切接触
D.眼泪中的溶菌酶可破坏侵入人体的细菌
开始考试练习点击查看答案13关于“生态系统能量流动传递效率为10％”的理解，正确的是
A.上一营养级约有10％的个体被下一营养级吃掉
B.每一营养级通过呼吸作用消耗的能量为90％
C.上一营养级约有10％的能量流到下一营养级
D.分解者能量约占生产者能量的10％
开始考试练习点击查看答案14下列关于果酒制作过程中的叙述，正确的是
A.应先去除葡萄的枝梗，再进行冲洗，这样洗得彻底
B.在变酸的果酒表面观察到的菌膜可能是醋酸菌在液面大量繁殖形成的
C.在发酵过程中，需从充气口不断通入空气
D.由于酵母菌的繁殖能力很强，不需对所用的装置进行消毒处理
开始考试练习点击查看答案15下列关于腐乳制作的描述中，错误的是
A.加盐和加酒都能抑制微生物的生长
B.密封瓶口前最好将瓶口通过火焰以防杂菌污染
C.含水量大于85%的豆腐利于保持湿度，适宜制作腐乳
D.在腐乳制作过程中必须有能产生蛋白酶的微生物参与
开始考试练习点击查看答案16下列关于实验叙述中，不正确的是
A.血红蛋白的提取和分离实验中使用的交联葡聚糖凝胶G-75，其中“75”表示每克凝胶膨胀时吸水7.5克
B.观察DNA在细胞中的分布实验中，加入盐酸可以使染色体中的DNA与蛋白质分离
C.用洋葱作实验材料进行DNA的粗提取与鉴定实验时，加入一定的食盐的目的是有利于溶解DNA
D.制取细胞膜、血红蛋白的提取和分离均以鸡血细胞作为实验材料
开始考试练习点击查看答案17下列关于甲型H1N1流感病毒的有关叙述中，正确的是
A.甲型H1N1流感病毒不具有细胞结构
B.甲型H1N1流感病毒是一个独立的生命系统
C.甲型H1N1流感病毒的遗传物质是RNA
D.甲型H1N1流感病毒的生存和繁殖离不开活细胞
开始考试练习点击查看答案18按下表设计进行实验。分组后，在相同的适宜条件下培养8～10小时，并对实验结果进行分析。下列叙述不正确的是 <table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-COLLAPSE: collapse; BORDER-TOP: medium none; BORDER-RIGHT: medium none; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext; mso-yfti-tbllook: 480" border="1" cellspacing="0" cellpadding="0" _dj="MsoTableGrid"><tbody><tr style="HEIGHT: 17pt; mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">实验材料</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">取样</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">处理</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 111.2pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-height-rule: exactly" width="148" colspan="2">分组</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">培养液</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">供氧情况</td></tr><tr style="HEIGHT: 17pt; mso-yfti-irow: 1; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" rowspan="4" width="74">适宜浓度酵母菌液</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" rowspan="2" width="74">50mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" rowspan="2" width="74">破碎细胞，离心取上清液</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">甲</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">25 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">75 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">无氧</td></tr><tr style="HEIGHT: 17pt; mso-yfti-irow: 2; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">乙</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">25 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">75 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">通氧</td></tr><tr style="HEIGHT: 17pt; mso-yfti-irow: 3; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" rowspan="2" width="74">50mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" rowspan="2" width="74">未处理</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">丙</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">25 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">75 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">无氧</td></tr><tr style="HEIGHT: 17pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes; mso-height-rule: exactly"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">丁</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">25 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">75 mL</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 55.65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 17pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-height-rule: exactly" width="74">通氧</td></tr></tbody></table>
A.甲组不产生C02而乙组产生
B.丁组产生的C02比甲组多
C.丁组能量转换率与丙组相同
D.丁组的氧气消耗量大于乙组
开始考试练习点击查看答案19下列说法正确的是
A.胚胎工程技术包括胚胎移植、胚胎分割、体外生产胚胎技术
B.试管牛的培育过程属于克隆技术
C.提供胚胎的个体成为“供体”，接受胚胎的个体成为“受体”
D.胚胎移植实际上是生产胚胎的供体和孕育胚胎的受体共同繁殖后代的过程
开始考试练习点击查看答案20下列有关生物技术的叙述，正确的是
A.果酒、果醋和腐乳在发酵中最适宜的温度都是25℃
B.制作腐乳时，加盐腌制可使豆腐块变硬且能抑制杂菌生长
C.固定化酵母细胞成本低,操作比较容易
D.使用透析法可以去除样品中相对分子量较小的杂质
开始考试练习点击查看答案