Quiz on Gibberellins and Barley Seed Germination

What are gibberellins primarily involved in?

• Controlling photosynthesis

• Stimulating root growth

• Controlling seed germination and stem elongation

• Regulating water absorption

What state is a barley seed in when it is shed from the parent plant?

• Dormancy

• Active growth

• Germination

• Decomposition

What does the barley seed contain that will grow into a new plant?

• Endosperm

• Aleurone layer

• Embryo

• Cotyledon

What is the function of the endosperm in a barley seed?

• To provide energy store

• To absorb water

• To protect the embryo

• To regulate gene expression

What triggers the barley seed to start the germination process?

• Exposure to sunlight

• Increase in temperature

• Absorption of water

• Absorption of nutrients

What do gibberellins stimulate the aleurone layer to synthesize?

• Maltose

• Amylase

• Starch

• Glucose

How do gibberellins affect the synthesis of amylase?

• By hydrolyzing starch

• By regulating genes involved in amylase synthesis

• By converting maltose to glucose

• By decreasing mRNA transcription

What does amylase do to starch molecules in the endosperm?

• Converts them to proteins

• Absorbs them

• Hydrolyzes them

• Synthesizes them

What is maltose converted to after being produced from starch?

• Sucrose

• Fructose

• Cellulose

• Glucose

Where is glucose transported after being produced from maltose?

• To the aleurone layer

• To the endosperm

• To the embryo

• To the parent plant