大全14（14/63）生物题

greeley

第2题

It can be inferred from the passage that the morphogenetic determinants present in the early embryo are

a) located in the nucleus of the embryo cells

b) evenly distributed unless the embryo is not developing normally

c) inactive until the embryo cells become irreversibly committed to their final function

d) identical to those that were already present in the unfertilized egg

e) present in larger quantities than is necessary for the development of a single individual

answer: E

3. the main topic of the passage is

a)

b) The main contribution of modern embryology to molecular biologyy

c)

d) cell determination as an issue in the study of embryonic development.

e)

answer: D

My choice is B.

不清楚到底是把cell的研究用到embryo的上，还是embryo的用到molecule上．

6. It can be inferred from the passage that which of the following is dependent on the fertilization of an egg.

The answer is B: sunthesis of proteins called histones.

好象文章中说到的histones和这个没关系啊．

9. Which of the following circumstances is most comparable to the impasse biologists encountered in trying to resolve the debate about cell determination ?

the answer is D: The predicament of a linguist trying to develop a theory of language acquisition when knowledge of the structure of language itself is rudimentary at best

找不出共同点啊．．．

今天做了这片阅读错了好多哦，上一篇生化题没咋看懂都做的很好，这个还感觉看的很懂了．

为什么会这样啊？哪位牛牛救救偶呀？先谢过．

xealot

这一篇OG都讲D比较清楚o~~~

关于Quiz 3，这篇文章一开始就提出个问题，然后后面用新的approach解决之，因此就不难选了

Quiz 6，9要仔细看OG的解释

这一篇偶第一次做也苦到想自杀....

greeley

谢谢zealot!

你说"这一篇偶第一次做也苦到想自杀....",,,我心里平衡多啦~~~~

偶准备阅读就练那个63新题,22补充题,15考古题和OG新增17题,不知道可以不?

xealot

据说63+17就够了，其中第二篇不用看

偶头两次就是看这80篇...

22篇补充的味道和OG前面部分的比较象，而OG后面部分和考试比较象；考古题略难

另外GWD除了做模考外，也应仔细研究

xjlv128

以下是引用greeley在2004-12-29 14:01:00的发言：

第2题

It can be inferred from the passage that the morphogenetic determinants present in the early embryo are

a) located in the nucleus of the embryo cells

b) evenly distributed unless the embryo is not developing normally

c) inactive until the embryo cells become irreversibly committed to their final function

d) identical to those that were already present in the unfertilized egg

e) present in larger quantities than is necessary for the development of a single individual

answer: E

这题我觉得真的要“推断”。既然可以生成两个个体，那么md当然能生成很多啦。

3. the main topic of the passage is

a)

b) The main contribution of modern embryology to molecular biologyy

c)

d) cell determination as an issue in the study of embryonic development.

e)

answer: D

My choice is B.

不清楚到底是把cell的研究用到embryo的上，还是embryo的用到molecule上．

先用常识，当然是分子学用到胚胎学啊（小到大嘛）。

从文章出发，先说研究胚胎搞不定，又说了半天cell地东西，说使得胚胎问题有希望解决了……（明白了吧？）

6. It can be inferred from the passage that which of the following is dependent on the fertilization of an egg.

The answer is B: sunthesis of proteins called histones.

好象文章中说到的histones和这个没关系啊．

末段说histone地形成要靠RNA作用对吧？上一段说RNA不到受精不发挥作用。所以是B啊

9. Which of the following circumstances is most comparable to the impasse biologists encountered in trying to resolve the debate about cell determination ?

the answer is D: The predicament of a linguist trying to develop a theory of language acquisition when knowledge of the structure of language itself is rudimentary at best

找不出共同点啊．．．

生物学家们因为搞不清内部结构和作用机理——它本身的东西，所以争论。D里面也是itself的东西搞不清啊。

kevin512813

第6题答案源于3、4段第一句
Studying sea urchins, biologist Paul Gross found that an unfertilized egg contains substances that function as morphogenetic determinants.
The substances that Gross studied are maternal messenger RNA’s—products of certain of the maternal genes.