Seed Germination 2

What is the usual event that terminates germination and marks the beginning of seedling growth?

• Radicle protrusion

• Cell division

• Mitochondrial DNA synthesis

• Starch breakdown

What is the main enzyme responsible for the breakdown of starch in cereals?

• b-amylase

• a-Galactosidase

• a-glucosidase

• a-amylase

What is the most common reserve carbohydrate in seeds?

• Starch

• Maltose

• Glucose

• Sucrose

What is the process by which the radicle emerges through cell extension?

• Turgor-driven process

• Cell division

• Starch phosphorylase

• Phosphorolysis

Which enzyme is responsible for the hydrolysis of b (1!4)-linked mannose to mannobiose or mannotriose?

• a-amylase

• b-mannoside mannohydrolase

• a-glucosidase

• a-Galactosidase

What is the main function of expansins in germinating seeds?

• Transport of glucose

• Synthesis of DNA

• Hydrolysis of starch

• Disruption of cell wall polymers

Which structure can prevent the extension of the radicle and completion of germination?

• Mitochondria

• Scutellum

• Aleurone layer

• Endosperm

What is the main source of native starch grain in cereals?

• Embryo

• Endosperm

• Perisperm

• Megagametophyte

What is the enzyme responsible for the synthesis of sucrose in pea cotyledons?

• Sucrose synthase

• a-Galactosidase

• a-glucosidase

• Starch phosphorylase

What is the main function of endo-b-mannanase in seeds?

• Synthesis of sucrose

• Hydrolysis of hemicelluloses

• Transport of glucose

• Hydrolysis of starch