biotechnology lec 3

Why are normal tomatoes harvested before they have ripened?

• To prevent bruising during shipping

• To increase flavor components

• To reduce pectin degradation

• To make them firm for shipping

What is the benefit of harvesting Flavr-Savr tomatoes after they have started to ripen on the vine?

• They have more flavor

• They are easier to ship

• They are resistant to bacteria

• They have larger pectin molecules

What is the role of pectin in determining tomato juice viscosity?

• It enhances the color of the juice

• It affects the thickness of the juice

• It increases the acidity of the juice

• It decreases the sweetness of the juice

How does the antisense PG gene in Flavr-Savr tomatoes inhibit PG enzymes?

• By increasing their mRNA production

• By binding to their mRNA

• By degrading their protein

• By enhancing their activity

What is the purpose of using kanamycin resistant gene as a selective marker?

• To enhance tomato color

• To increase tomato yield

• To identify transformed plants

• To improve tomato flavor

Which bacteria infects the plant to pass genes into the plant's genome?

• Escherichia coli

• Pseudomonas aeruginosa

• Bacillus subtilis

• Agrobacterium tumefacines

What happens if a plant does not have the KanR gene when grown on a kanamycin containing medium?

• It will grow faster

• It will not grow

• It will change color

• It will produce more fruit

Why are soft tomatoes prone to bruising during the shipping process?

• Due to increased acidity

• Due to larger pectin molecules

• Due to their texture

• Due to lack of flavor

What is the effect of the antisense PG gene on the ripeness of Flavr-Savr tomatoes?

• It enhances ripeness

• It has no effect on ripeness

• It delays ripening

• It accelerates ripening

How does the antisense PG RNA disable regular PG enzymes?

• By increasing their mRNA production

• By binding to their mRNA

• By degrading their protein

• By enhancing their activity