#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?
#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?
#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?
#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 ;
#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?
#Question id: 10524
#Section 6: Plant, Animal and Microbial Biotechnology
Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids, these alkaloids shows;
a) Alkaloids are derived from the tryptophan as constitutively produced defensive secondary metabolites
b) These benzoxazinoids such as DIBOA and its derivative DIMBOA are usually stored in the peroxisome
c) Upon damage, the inactive glycosides are hydrolyzed, generating glucosinolate, which are toxic not only to insect herbivores but also against pathogens
d) DIBOA and DIMBOA perform insecticidal and pesticidal activities
e) It can be inactivated by hydroxylation and N-glycosylation reactions
Which of the following combination is correct about benzoxazinoids alkaloids?