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TLS Online TPP Program

#Question id: 10522

Mechanical barriers provide a first line of defence against insect pests and pathogens, these mechanical barriers developed by plants;

                   COLUMN A  

                     COLUMN B

A. Thorns

i) It can be found on the stem and petioles of roses and are formed by the epidermis

B. Spines

ii) Found on a lemon tree (Citrus sp.) are modified branches, as can be seen by their position in the axil of a leaf

C. Prickles

iii) Found on shoot and leaves of tomato (Solanum lycopersicum) are derived from epidermal cells

D. Trichomes

iv) which are characteristic of cacti (Opuntia spp.) in the New World, are modified leaves

Match correctly following combination of barrier developed by plants ;

#Section 6: Plant, Animal and Microbial Biotechnology
  1. A-ii, B-iv, C-i, D-iii
  2. A-iii, B-iv, C-i, D-ii
  3. A-iii, B-i, C-iv, D-ii
  4. A-iv, B-iii, C-i, D-ii
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TLS Online TPP Program

#Question id: 4554

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

In which studies have shown that phosphorylated NtrC bound at enhancers and σ54-polymerase bound at the promoter interact directly, forming a loop in the DNA between the binding sites?
TLS Online TPP Program

#Question id: 27054

#Section 4: Fundamentals of Biological Engineering

For the given distillation column 1000 Kg of feed is given to the column and the efficiency of the column is 10%.  What is the amount of product?   



    
TLS Online TPP Program

#Question id: 27177

#Section 5: Bioprocess Engineering and Process Biotechnology

A strain of Azotobacter vinelandii is cultured in a 15-m³ stirred fermenter for alginate produc- tion. Under current operating conditions, kLa is 0.17 s-1. The solubility of oxygen in the broth is approximately 8 × 10-3 kg m-3.
(b) The bacteria suffer growth inhibition after copper sulphate is accidentally added to the fermentation broth just after the start of the culture. This causes a reduction in the oxygen uptake rate to 3 mmol g-1 h-1. What maximum cell concentration can now be supported by oxygen transfer in the fermenter?.....g/l
TLS Online TPP Program

#Question id: 386

#Section 4: Fundamentals of Biological Engineering

Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
TLS Online TPP Program

#Question id: 10765

#Section 3: Genetics, Cellular and Molecular Biology

Degree of freedom is (where n is phenotype)