Plant - Growth & Development Test 7

A: If a plant is kept horizontally, auxin accumulates on a lower surface.

R: Displacement of statoliths and other cell organelles to lower surface modifies the translocation pattern of auxin.

A: Only buds or embryos can be vernalized.

R: Vernalization requires dividing cells.

A: Phytochrome, a protein, has a regulatory function.

R: Various morphogenetic processes are regulated by it.

A: Auxins treatment causes acidification of cell wall and helps in cell elongation.

R: Loosening of cell wall microfibrils occurs.

A: Cytokinins are anti-ageing hormones.

R: They cause changes in osmotic potential by increasing the volume of mature cells.

A: Gibberellic acid increases the yield of malt from barley grain.

R: Gibberellins stimulate the synthesis of amylase, protease and other hydrolytic enzymes for mobilisation of reserve food.

A: 2, 4-D is widely used by farmers in agricultural and horticultural practices.

R: Flowering in most plants can be initiated by using high concentration of Auxin.

A: Cytokinin, along with the auxin, is required for morphogenesis.

R: More cytokinin to auxin ratio promote root initiation during micropropagation.

A: Seeds do not sprout when Gibberellins overcome ABA.

R: GA inhibits protein and RNA synthesis.

A: Soyabean and sugar beet flower when exposed to a photoperiod shorter than a critical period.

R: Most winter flowering plants are LDP.