#Question id: 2527
#Section 3: Genetics, Cellular and Molecular Biology
Transpirational water flow in the xylem requires a mechanically strong wall that resists from,
#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: 344
#Section 4: Fundamentals of Biological Engineering
The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?
#Question id: 636
#Section 2: General Biology
DNA polymerase contains a lysine residue that is important for binding to DNA. Mutations were found that converted this lysine to either glutamate, glycine, valine, or arginine. Which mutations would be predicted to be the most and least harmful to the ability of the enzyme to bind DNA?
|
Most |
Least |
|
|
(A) |
Valine |
Aspartate |
|
(B) |
Glycine |
Arginine |
|
(C) |
Arginine |
Glycine |
|
(D) |
Glutamate |
Arginine |
#Question id: 15730
#Section 6: Plant, Animal and Microbial Biotechnology