2002年4月，以杭州华大基因研究中心和浙江大学生物信息学研究中心为主体的科学家成功破译了水稻基因组，下列有关遗传物质叙述中，不正确的是：（ ）
A.水稻基因实质上是水稻DNA分子上起遗传作用的遗传物质
B.水稻抗病、抗倒伏、高产优质等一系列可遗传的性状均由基因决定
C.水稻DNA分子是一种大分子化学物质，相对质量较大
D.水稻、人类等生物体的基因、DNA.染色体不可能发生变化
答案：D
题目分析：细胞核中能被碱性染料染成深色的物质叫做染色体，它是由DNA和蛋白质两种物质组成，DNN是主要的遗传物质，它的结构像一个螺旋形的梯子．一条染色体上包含一个DNA分子．一个DNA分子上包含有多个基因，基因是染色体上具有控制生物性状的DNA片段．生物的各种性状都是分别由这些不同的基因控制的．
| Caesar was right. Thin people need watching. I’ve been watching them for most of my adult life, and I don’t like what I see. When these narrow fellows spring at me, I quiver to my toes. Thin people come in all personalities, most of them menacing. You’ve got your "together" in person, your mechanical thin person, your condescending thin purism, your tsk-tsk thin person, your efficiency-expert thin person. All of them are dangerous. In the first place, thin people aren’t fun. They don’t know how to goof off, at least in the best, fat sense of the word. They’ve always got to be adoing. Give them a coffee break, and they’ll jog around the block. Supple them with a quiet evening at home, and they’ll fix the screen door and lick S & H green stamps. They say things like "there aren’t enough hours in the day". Fat people never say that. Fat people think the day is too damn long already. Thin people make me tired. They’ve got speedy little metabolisms that cause them to bustle briskly. They’re forever rubbing their bony hands together and eyeing new problems to "tackle". I like to surround myself with sluggish, inert, easygoing fat people, the kind who believe that if you clean it up today, it’ll just get dirty again tomorrow. Some people say the business about the jolly fat person is a myth, that all of us chubbies are neurotic, sick, sad people. I disagree. Fat people may not be chortling all day long, but they’re a hell of a lot nicer than the wizened and shriveled. Thin people turn surly, mean, and hard at a young age because they never learn the value of a hot-fudge sundae for easing tension. Thin people don’t like gooey soft things because they themselves are neither gooey nor soft. They are crunchy and dull, like carrots. They go straight to the heart of the matter while fat people let things stay all blurry and hazy and vague, the way things actually are. Thin people want to face the truth. Fat people know there is no truth. One of my thin friends is always staring at complex, unsolvable problems and saying, "The key thing is fat people never say that." They know there isn’t any such thing as the key thing about anything. |
According to the passage, the author likes being with those ______.
A．fat people who are clumsy and slow in movement and gets fed up with those quick and sensitive thin people
B．thin people who are always energetic and active and those fat people, too, who are steady in the moves they take
C．fat people who are inactive and easily get jaded but hates to be among those thin people who are active and energetic
D．thin people who get rid of things quickly but feels sick of those fat people who are all thumbs