Postharvest Handling of Fruits and Vegetables Flashcards
True or False.
The WHO recommends less than 400 g of fruits and vegetables per day (excluding starchy root crops)
False.
it should be greater than or equal to 400g
It is the vitamin present in all fruits and vegetables, supplying about 95% of body requirements.
Vit C
What is the botanical definition of a fruit?
The edible portion of a plant that contains the seed or its envelope.
What kind of vegetable is an onion?
Bulb (underground bud)
What are the three main categories of vegetables?
seeds and pods
bulbs, roots, and tubers
flowers, buds, stems, and leaves
True or False
The structural origins of fruits and vegetables have a major bearing on the recommendations for their postharvest management.
True.
Give an example of fruit consumed as vegetable.
Ripe - tomato, eggplant
Immature - zucchini, cucumber, okra
True or False
Above ground structures in plants do not have natural wax coatings as they mature while roots develop some of the same coating.
False.
Above ground structures structures in plants have natural wax coatings as they mature which reduces transpiration (evaporation of water in plants). While roots do not develop such coatings therefore should be stored at high relative humidity to minimize water loss.
True or false.
All fruits and vegetables are plant organs.
True
True or false
All plant organs consist of plant tissues with a collective composition of a cell, where a cell wall is within the cell.
True.
What composes the rigid cell walls of plant cells?
Cellulose fibers and other polymers such as pectic substances, hemicelluloses, lignins, and proteins.
It is the communication channel of adjacent cells that link their cytoplasmic masses.
Plamodesmata
What consist the molecular structure of pectin?
Homogalacturonan
Rhamnogalacturonan I
Which one is incorrect:
A. Cell walls provide support to the cell membrane, plasmalemma against the hydrostatic pressure of the cell contents that might burst the membrane.
B. Cell walls are soft and composed of chloroplasts.
B. Cell walls are rigid and they are composed of cellulose fibers.
True or False
The breakdown of storage reserves of carbohydrate by glycolysis and protein synthesis occur in the mitochondria.
False.
It occurs in the cytoplasm
This organelle contains the DNA of the cell.
Nucleus
What is the transcription product of the genetic code of DNA called?
mRNA
Why is the mitochondria called the powerhouse of the cell?
It is because it utilizes the products of glycolysis for energy production.
What is the photosynthetic apparatus of the cell?
Chloroplasts.
This organelle contains the respiratory enzymes of the TCA cycle and respiratory electron transport system which synthesizes ATP
Mitochondria