细胞是最基本的生命系统，下列说法正确的是①细胞是一切生物体结构-最需题库

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1分析一条多肽链得到以下结果：(单位：个) <table style="BORDER-COLLAPSE: collapse; MARGIN-LEFT: 0.5pt; mso-table-layout-alt: fixed; mso-padding-alt: 0cm 0cm 0cm 0cm" border="0" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 14pt; 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: 0cm; WIDTH: 73.65pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="98">元素或基团</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.35pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="70"> C</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.3pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="70"> H</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.3pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="70"> O</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.8pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="70"> N</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.35pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="70"> —NH2</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 51.35pt; PADDING-RIGHT: 0cm; HEIGHT: 14pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext 1.0pt" valign="top" width="68">一COOH</td></tr><tr style="HEIGHT: 16pt; mso-yfti-irow: 1; mso-yfti-lastrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 73.65pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; BORDER-TOP: medium none; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext 1.0pt" valign="top" width="98"> 多肽</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.35pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="70"> 202</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.3pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="70"> 348</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.3pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="70"> 62</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.8pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="70"> 53</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 52.35pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="70"> 3</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 0cm; WIDTH: 51.35pt; PADDING-RIGHT: 0cm; HEIGHT: 16pt; 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" valign="top" width="68"> 2</td></tr></tbody></table>推算这种多肽中氨基酸的数目及这些氨基酸中的羧基、氨基数依次是
A.101 54 102
B.62 53 55
C.53 54 53
D.51 52 53
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2与下列几种微生物有关的叙述中，正确的是①酵母菌　　②醋酸菌　 ③硝化细菌　　④蓝藻　　⑤烟草花叶病毒
A.从同化作用类型看，②是厌氧型，③④是自养型
B.从结构组成看，①具有成形的细胞核，⑤的遗传物质中不含胸腺嘧啶
C.从异化作用类型看，①②是异养型，③④是自养型
D.从生态系统中的成分看，①②③是分解者，④⑤是生产者
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3下列产醋最多的措施是
A.将果酒暴露在空气中
B.将果酒中加入食醋，并通气
C.将果酒中加入冲洗葡萄的水，并通气
D.将果酒中加入变酸的酒表面的菌膜，并通气
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4腐乳在酿造后期发酵中添加适量酒液的目的不包括
A.防腐
B.与有机酸结合形成酯
C.利于后期发酵
D.满足饮酒的需要
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5在除去杂质时为什么可以将滤液放在60－75℃的恒温水浴箱中保温10－15min
A.使DNA变性
B.使蛋白质变性
C.使DNA和蛋白质变性
D.分解蛋白质
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