Question

Photosynthetic food material is transported in the form of
A. Glucose
B. Sucrose
C. Starch
D. Fructose

Answer 1

Hint: Food materials are produced in the leaves by photosynthesis and it is transported to the different regions of the plant through the phloem. Some of this food is used by the plant for the growth development of itself and the excess food is stored.

Complete step by step answer: Photosynthates are a type compound that carries energy-rich carbon and these are produced through the process of photosynthesis. These photosynthates are moved from the leaf to that organ and tissue which are non-photosynthetic in nature such as roots, stem tissues, and developing seeds. There is long-distance transport of photosynthates that takes place through the phloem. This type of transport is called translocation.
Sucrose is a disaccharide of glucose and fructose. It is one of the most common forms of carbohydrates. Sucrose bears features of non-reducing sugar and due to this reason, it is comparatively more chemically stable. Sucrose does not react with other substances during the translocation as it is chemically stable. For all these causes, the photosynthetic food materials are translocated from leaf to the non- photosynthetic organs in the form of sucrose. Photosynthetic food material supplies energy to non-photosynthetic tissues through respiration.
Some food is utilized by the plants for its growth and development and excess food is stored in the form of starch and plants use this food whenever needed. The organ where the food is stored is known as the storage organs and this is mainly occurring in the fruits and seeds and the roots.
During the transformation of sucrose into starch, the concentration of sucrose is maintained as low at the storage region and this is maintained until a sufficient quantity is accumulated.
Glucose is osmotically active and it is also chemically reactive. Due to this property, during translocation, it reacts with the other chemical molecules.
Fruits are the parts that are rich in fructose sugar concentrations and fructose is also known as fruit sugar. It is also found in honey berries etc.
Therefore, the correct option is option B.

Note: Plants are autotrophs as they can produce their foods through the process of photosynthesis in the leaves. After the formation of photosynthetic food material, it is transported to the other region through the phloem tissue. As sucrose, a disaccharide of the glucose and fructose is osmotically active and chemically stable, for this reason the food that is transported from the leaves to different parts of the plant takes place in the form of sucrose.