人体细胞中的染色体DNA会随着复制次数增加而逐渐缩短。在生殖细胞和癌细胞中存在端粒酶(由 RNA和蛋白质形成的复合体),能够将变短的 DNA 末端重新加长。端粒酶作用机理如图所示。下列相关叙述不正确的是:
生物
人类的秃顶由常染色体上的基因控制,在男性中只要有一个秃顶基因(b)就表现为秃顶,女性在秃顶基因纯合状态时才表现出秃顶。眼白化病是一种眼部着色减少的遗传病,相关基因用D和d表示,如图为某家系中有关这两种遗传病的遗传系谱图,已知3号个体不携带眼白化病致病基因。请回答下列问题
将某种植物的成熟细胞放入一定浓度的物质A溶液中,发现其原生质体(即植物细胞中细胞壁以内的部分)的体积变化趋势如图所示。
光线进入小鼠眼球刺激视网膜后,产生的信号通过下图所示过程传至高级中枢,产生视觉。 有关上述信号产生及传递过程的叙述错误的是
—No words are strong enough to express our heartfelt thanks for your assistance. —________.
英语
With a lot of questions _________, the official is having a hard time
His ________ were published during the last decade, one of which talks about the child laborers’ miserable life in a local ________.
It’s said that the president’s absence has _______ wide concerns and guesses.
No matter how________, it is not necessarily lifeless.
It was from only a few supplies that she had brought in the village ____ the hostess cooked such a nice dinner.
—Hi, sir, may I __ seats with you? I want to sit next to my mother. —With pleasure.
The pandemic has fundamentally altered consumer behavior and enterprise operations, ________ digital adoption and transformation a necessity.
With a lot of questions _________, the official is having a hard time.
_______ from the HR department, old Ben makes an attempt to work as an trainee in a fashion shopping website.
Only one child of the thirty passengers in the plane _____ after the air crash.
How will the man send his application?
As the Internet is expanding day by day, the opportunities for crime ______ as well.
My family used to live in _____ city of Shanghai but now have moved to _____ countryside.
He thought he was helping us with the work, he was actually in the way.
Along with enthusiasm for composing music _________ his devotion to cultivating young people's passion for music.
精彩推荐
青年大学习2022年第3期答案最新
1年前
植物进行呼吸作用的产物是 ①水②二氧化碳③氧气④淀粉⑤能量 [ ]
“探险队员”--盐酸,不小心走进了化学迷宫,不知怎样走出来,因为迷宫有许多“吃人的野兽”(即能与盐酸反应的物质),盐酸必须避开它们,否则就无法通过。
写反义词。 熟悉——( ) 幼稚——( ) 温暖——( ) 消失——( )
A为3阶矩阵,A*为A的伴随矩阵,|A|=1,求|(2A)^-1 +3A*|