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TLS Online TPP Program

#Question id: 10132

Which of the following statements would be correct for photophosphorylation ?

#Section 2: General Biology
  1. Water is oxidized and protons are released in the lumen by PSII and reduces NADP+ to NADPH in the stroma both are spontaneous processes becoz their reduction potential is positive
  2. The sequential absorption of four photons (excitons) —known as S states, each absorption causing the loss of one electron from the Mn4Ca cluster, produces an oxidizing agent that can remove four electrons from two molecules of water, producing O2, the electrons lost from the Mn4Ca cluster pass one at a time to an oxidized Tyr residue in a PSII protein, then to P680+
  3. An alternative path of electron is cyclic electron transfer, in which elctron move from ferredoxin back to the cytochrome b6 f complex, the cyclic pathway produces more ATP and Water produces but less NADPH produces than the noncyclic
  4. Transfer of the two electrons to PQB reduces it to PQB 2–, and the reduced PQB 2– takes two protons from the stroma side of the medium, yielding a fully reduced plastohydroquinone (PQH2), the PQH2 then still remain bounded from the reaction center complex
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TLS Online TPP Program

#Question id: 10518

#Section 6: Plant, Animal and Microbial Biotechnology

HC-toxin from the fungus Cochliobolus carbonum, which causes northern leaf blight disease, and inhibits
TLS Online TPP Program

#Question id: 10519

#Section 6: Plant, Animal and Microbial Biotechnology

Which of the following toxins derived from the fungus Cochliobolus carbonum inhibits specific histone deacetylases in maize?
TLS Online TPP Program

#Question id: 10520

#Section 6: Plant, Animal and Microbial Biotechnology

Which one of the following fungus causes infected rice shoots to grow much faster relative to uninfected plants and responsible for the “foolish seedling disease” of rice?
TLS Online TPP Program

#Question id: 10521

#Section 6: Plant, Animal and Microbial Biotechnology

Which is an example of a plant-derived DAMP found in tomato that is produced in response to wounding associated with herbivore activity?
TLS Online TPP Program

#Question id: 10522

#Section 6: Plant, Animal and Microbial Biotechnology

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 ;
TLS Online TPP Program

#Question id: 10523

#Section 6: Plant, Animal and Microbial Biotechnology

Conifer resin ducts, which are found in the cortex and phloem, contain a mixture of diverse terpenoids, which are released immediately upon damage by herbivores such as;

a) monocyclic terpenes like- limonene and terpinolene

b) bicyclic monoterpenes- α-pinene and β-pinene

c) tricyclic sesquiterpenes- longifolene, caryophyllene, and δ-cadinene

d) tetracyclic terpenes- longifolene, tetra-terpinolene terpenoids are incorrect?