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Which one of the following factors is responsible for activation of protoxin into active Bt toxin of Bacillus thuringiensis?
Concept: Microbes in Household Products
Home-made fruit juices are turbid, while the bottled ,fruit juices purchased from the market are clear. Give a reason for this difference.
Concept: Microbes in Household Products
Read the passage given below carefully and answer the questions that follow:
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The bacterium Bacillus thuringiensis serovar israelensis (Bti) is commercially prepared in various formulations such as liquid, water dispersible granules, powders, and pellets. It is used as a larvicide all over the world due to its ability to produce a toxic protein that primarily targets the larvae of mosquitoes. In Sweden, Bti has been applied on a large scale in the form of commercially available granular formulation Vecto Bac G (Valent BioScience, USA). The applications have taken place in the lower Dalalven River Area to control mass outbreaks of the floodplain mosquito Aedes sticticus. |
- Why does the toxic protein kill the insects but not the bacterium?
- Can the formulation Vecto Bac G be used to eliminate the species of mosquito referred to above? Why?
Concept: Microbes in Household Products
Why are the biocontrol agents preferred over the chemical pesticides?
Concept: Microbes as Biocontrol Agents
Why are some molecules called bioactive molecules?
Concept: Microbes in Industrial Products
Mention the respective source and state the specific use of any two bioactive molecules.
Concept: Microbes in Industrial Products
Mention one significant difference between Parenchyma and Sclerenchyma.
Concept: Tissue Culture
Mention one significant difference between Symplastic movement and apoplastic movement
Concept: Tissue Culture
In the following questions/statements has four suggested answers. Rewrite the correct answer
Roots and shoots lengthen through the activity of:
(A) Apical meristem
(B) Vascular Cambium
(C) Lateral meristem
(D) Cork Cambium
Concept: Tissue Culture
In the following questions/statements has four suggested answers. Rewrite the correct answer
Opening and closing of stomata is due to:
(A) Ca2+
(B) Na+
(C) K+
(D) Cl–
Concept: Tissue Culture
Give three anatomical differences between a monocot root and a dicot root
Concept: Tissue Culture
Explain the transpiration pull theory for an ascent of sap
Concept: Tissue Culture
Why are xylem and phloem classified as complex tissues?
Concept: Tissue Culture
Describe the structure of phloem.
Concept: Tissue Culture
Describe the ultra-structure of a chloroplast.
Concept: Single Cell Protein (SCP)
What is single cell protein?
Concept: Single Cell Protein (SCP)
Give one significant contribution of the given scientists:
P. Maheshwari
Concept: Tissue Culture
Describe the tissue culture technique in plants.
Concept: Tissue Culture
What does PCR stand for? Describe the different steps of PCR
Concept: Principles of Processes of Biotechnology
Give an account of the Blue-White Method of selection of recombinants.
Concept: Principles of Processes of Biotechnology
