基因工程中,需使用特定的限制酶切割目的基因和质粒,便于重组和筛选。已知限制酶Ⅰ的

题型:选择题

问题:

基因工程中,需使用特定的限制酶切割目的基因和质粒,便于重组和筛选。已知限制酶Ⅰ的识别序列和切点是—G↓GATCC—,限制酶Ⅱ的识别序列和切点是—↓GATC—。根据图示判断下列操作正确的是

[ ]

A.目的基因和质粒均用限制酶Ⅱ切割

B.目的基因和质粒均用限制酶Ⅰ切割

C.质粒用限制酶Ⅱ切割,目的基因用限制酶Ⅰ切割

D.质粒用限制酶Ⅰ切割,目的基因用限制酶Ⅱ切割

考点:DNA重组技术的基本工具
题型:选择题
根据表格里的信息,选择正确答案。
Mr. Cool’s Clothes Store
Clothes
Color
Price
socks
white, blue
$ 4
trousers
black, red
$ 11
sweaters
red, white
$ 8
T-shirt
green, black
$ 7
hat
black, red
$ 6
小题1: Which is the cheapest (最便宜的) of all?
A.A hat.B.A T-shirt.C.Socks.D.Sweaters.
小题2: How much are two pairs of trousers and a hat?
A.$ 22. B.$ 28.C.$ 14.D.$ 44.
小题3: You can buy _____ in Mr. Cool’s Clothes Store.
A.black trousersB.a blue sweater
C.a green hatD.yellow shorts
小题4: You like red and you only have $7. You can buy______.
A.a sweater B.a hatC.socksD.trousers
小题5: You only have sixteen dollars. You can buy ______.
A.a sweater and a pair of trousers
B.two T-shirts and a pair of socks
C.two sweaters
D.three hats and one T-shirt
题型:选择题

患者,女性,67岁。早期肝癌,拟行肝叶切除术。

护士为其术前肠道准备时应选择()

A.术前2天口服番泻叶

B.术前2天碱性液灌肠

C.术前2天酸性液灌肠

D.术前3天碱性液灌肠

E.术前3天酸性液灌肠

题型:选择题

Because Web servers are platform and application (71) ,they can send or request data from legacy or external application including database.All replies,once converted into (72) mark up language,can then be transmitted to a (73) .Used in this way,Intranets can (74) lower desktop support costs,easy links with legacy application and databases and, (75) all。ease of use.

A.browser

B.repeater

C.router

D.server

题型:选择题

中印边界争端由来已久,两国有着()多千米的边界线

A.1000

B.1800

C.2000

D.2200

题型:选择题

某中外合资经营企业的中国合营者拟通过外国合营者为保证人,向银行取得的贷款作为其出资。这一做法符合中外合资经营企业法律制度的规定。()

A.正确

B.错误

更多题库