作者arsenate (云深不知处)
看板TransBioChem
标题[生物] 试题分享VI
时间Fri Dec 24 11:08:19 2010
Merry Christmas ~
这几题算是近年来非常热门的考题
也属於分子生物学一定要懂的观念，
以下英文单字请务必要记(尤其考中兴&台联)
1. The physiological role of restriction endonucleases is to
(A) allow the in vitro construction of recombinant DNA molecules
(B) methylate host DNA
(C) remove RNA primer during DNA synthesis
(D) allow mapping of gene location
(E) cleave foreign DNA molecules that enter the cell
2. Which of the following is LEAST likely to cause a proto-oncogene to
become an oncogene?
(A) A gene is incorporated into a retroviral genome.
(B) A gene is expressed at an inappropriate time.
(C) A gene is moved close to an enhancer, causing excess product to be made.
(D) A gene is truncated, yielding a protein with modified activity.
(E) A gene is moved into centromeric heterochromatin, silencing its
transcription.
3. Which of the following is true concerning animal retroviruses?
(A) They must replicate during the S phase of the cell cycle.
(B) They require an RNA-dependent DNA polymerase.
(C) They are nonenveloped viruses.
(D) The virions have double-stranded RNA genomes.
(E) Replication of their genome occurs entirely within the host nucleus.
4. In the DNA sequence 5' CGA TCG GCT 3' , which of the following is
considered a transition-type mutation?
(A) 5 CGA CCG GCT 3
(B) 5 CGA TGG CT 3
(C) 5 CGA TCG CCT 3
(D) 5 CGA TCG GCA 3
(E) 5 CGA UCG GCU 3
(这一题是测验对於突变的相关概念，所以要先知道突变有哪几种？)
5. In adult mammals, the primary site for the final stage of differentiation
of T lymphocytes is the
(A) spleen
(B) bone marrow
(C) bursa of Fabricius
(D) thymus
(E) liver
(这题是免疫学的初阶，如果翻成中文，很明显是高中生也会写，
所以关键就在於要知道各个器官的英文)
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◆ From: 115.43.232.100
1F：→ x94jo3:CAADD 12/27 23:24
2F：→ x94jo3:我不确定 XDDD (心虚 12/27 23:24
3F：→ arsenate:第五题答对了~ 12/27 23:30
4F：→ x94jo3:所以我前面都错了..... 12/27 23:33
5F：→ x94jo3:我去找答案= =+++++ (赌气XD 12/27 23:33
6F：→ arsenate:第四题提示： Ａ是嘧啶变嘧啶 D是嘧啶变嘌呤 12/27 23:34
7F：→ arsenate:这时候就要静下来想想 transition型的突变有什麽特徵？ 12/27 23:35