Ethylene Function and Synthesis in Plants

The video explores ethylene, a simple alkene used as a plant hormone, detailing its roles in plant aging, leaf abscission, and fruit ripening. An experiment demonstrates ethylene's effect on ripening. The synthesis of ethylene from methionine and its bio-signaling mechanism involving copper ions and gene expression are also discussed.

What is one of the primary roles of ethylene in plants?

• Enhancing water absorption

• Inducing leaf abscission

• Promoting photosynthesis

• Stimulating root growth

In the experiment described, why does fruit in a sealed bag ripen faster?

• The bag provides more sunlight

• The bag keeps the fruit cooler

• The ethylene concentration is higher

• The fruit absorbs more water

Which process is NOT stimulated by ethylene in plants?

• Leaf abscission

• Chlorophyll catabolism

• Seed germination

• Photosynthesis

What is the initial substrate for ethylene biosynthesis in plants?

• Fatty acids

• Amino acids

• Glucose

• Methionine

How does ethylene interact with copper ions in the Golgi apparatus?

• Via pi-electron interaction

• By ionic bonding

• Through hydrogen bonding

• By forming a covalent bond

What is the role of ACC oxidase in ethylene biosynthesis?

• It initiates the methionine cycle

• It forms ethylene from ACC

• It degrades chlorophyll

• It synthesizes amino acids

Which enzyme is responsible for converting methionine to S-adenosylmethionine in plants?

• Chlorophyllase

• Sam synthetase

• Peroxidase

• ACC synthase