List of top Botany Questions on Plant Sciences asked in GATE XL

In a genetic cross between a true-breeding tall parent bearing red flowers and a true-breeding dwarf parent bearing white flowers, only tall plants with red flowers are obtained in the F$_1$ population. Considering these two traits segregate independently, if one tall individual is selected from the F$_2$ population, the probability that it would be genotypically homozygous for plant height and make red flowers is ........... {(Round off to two decimal places)}
In a genetic cross between a true-breeding tall parent bearing red flowers and a true-breeding dwarf parent bearing white flowers, only tall plants with red flowers are obtained in the F$_1$ population. Considering these two traits segregate independently, if one tall individual is selected from the F$_2$ population, the probability that it would be genotypically homozygous for plant height and make red flowers is ........... {(Round off to two decimal places)}
Which of the following reactions in plants is/are catalyzed by the malic enzymes?
Which of the following sequential reactions correctly represent(s) the flow of electrons from NADH to O2 in plant mitochondrial electron transport chain?

Correctly match the enzymes used as selectable markers (Group I) and the chemicals used for their selection (Group II):

Correctly match the economically important specialized metabolites (Group I) with their broad chemical classes (Group II):

Correctly match the names of the plant taxonomists (Group I) with the titles of the books they authored (Group II):

Identify the correct statement(s) with respect to plant disease:
Consider a diploid plant species where the cells in the epidermis (the outermost single cell layer) always divide in the anticlinal orientation. If one such cell within the central zone of the shoot apical meristem (SAM) spontaneously becomes tetraploid at the seedling stage, which one of the following cellular arrangements would be most likely observed if the meristem is examined at the adult stage?
Which one of the following mature cell types is live but usually lacks nucleus?
Which one of the following commercially important carbohydrates is naturally produced only by the members of the plant kingdom?
Which one of the following agents causes the necrotic ring spot disease in stone fruits?