GMT: Thứ Năm, ngày 13  tháng 12, năm 2018 . .   
Đăng nhập tạm thời:  

Trắc nghiệm IQ    Trắc Nghiệm Sinh Học    Trắc Nghiệm Thiên Văn Học    Địa Lý - Môi Trường    Lịch sử   
 Công Nghệ Sinh Học   

Biotechnology - 48
Which is/are the naturally occurring plant auxins? A. Indole acetic acid (IAA) B. Naphthalenacetic acid (NAA) C. 2,4-dichlorophenoxyacetic acid D. All of the above Which is/are the disadvantage/(s) of using IAA in plant cell culture media? A. It is unstable in solution B. Gets easily oxidized C. Conjugated to inactive form by plant cells D. All of the above To maintain the pH of the culture A. organic acid such as citric, fumaric, malic and succinic acid is used B. synthetic buffers such as Tris, MES or HEPS are used C. both (a) and (b) D. ammonium salts are used....
Thời gian bắt đầu: Hôm nay lúc 00:57:04(Server time)
Số câu hỏi: 10.   Tổng điểm: 10
Thời gian làm bài: 20 phút.  Thời gian còn lại: 
Cỡ chữ câu hỏi:  Cỡ chữ đáp án:
1-
Which is/are the naturally occurring plant auxins?
A-
Indole acetic acid (IAA)
B-
Naphthalenacetic acid (NAA)
C-
2,4-dichlorophenoxyacetic acid
D-
All of the above
2-
Which is/are the disadvantage/(s) of using IAA in plant cell culture media?
A-
It is unstable in solution
B-
Gets easily oxidized
C-
Conjugated to inactive form by plant cells
D-
All of the above
3-
To maintain the pH of the culture
A-
organic acid such as citric, fumaric, malic and succinic acid is used
B-
synthetic buffers such as Tris, MES or HEPS are used
C-
ammonium salts are used
D-
Both (a) and (b)
4-
Which of the following is not a cytokinin?
A-
2,4-dichlorophenoxyacetic acid
B-
6 benzylaminopurine
C-
Zeatin
D-
Kinetin
5-
Which of the following is not an auxin?
A-
Indole acetic acid (IAA)
B-
Naphthalenacetic acid (NAA)
C-
zeatin
D-
Indole butyric acid
6-
Which of the following is not true about nurse or conditioned medium?
A-
It is liquid removed from the suspension of fast growing cells
B-
It contains uncharacterized growth factor released by growing cells
C-
It is used in the culture of regenerating protoplast
D-
It is removed aseptically from the culture and is autoclaved before use
7-
Very high sugar concentration (40-100 g/l) have been used
A-
in specialized secondary metabolite production
B-
to adjust the osmotic potential of the media in short term treatment for regeneration
C-
Both (a) and (b)
D-
None of these
8-
What is 'nurse' or conditioned medium?
A-
It is the media full of growth factors used for the growth of cells
B-
It is the medium added to nurse the callus culture
C-
It is the liquid medium removed from the suspension of fast growing cells
D-
Both (a) and (b)
9-
What are the macronutrients used in plant cell culture medium?
A-
N, P, K, S, Na
B-
N, P, K, Ca, Cl
C-
N, P, K, S, Ca
D-
N, P, Ca, Na, Cl
10-
Neutralized activated charcoal is occasionally added to young regenerating cultures to
A-
remove toxic phenolics produced by the stressed plant cell
B-
help to remove plants growth regulators introduced at an earlier stage
C-
maintain the pH of the medium
D-
Both (a) and (b)
[ Thành Lãm - ST ]

Chia sẻ trên Facebook   Google Boomarks   Google Buzz    Xem: 685. Đăng: 21-08-2013.   

Support Link:
Thông tin trang Web. Online since: 2011.
Disclaimer of Liability and Endorsement:
free counters
VNEDU.ORG IS A NON-PROFIT WEBSITE! All contents throughout this website are from Internet and other sources and are posted by users, copyright belongs to its original author. VNEDU.ORG stores for educational purpose only. VNEDU.ORG resumes no responsibility and liability, make no promise, or guarantee for the accuracy or efficiency of any content. If you find any content that is in violation of copyright laws, please notify us and we will immediately remove them. Thank you for visiting VNEDU.ORG