NEET BIOLOGY

PLANT PHYSIOLOGY

TRANSPORT IN PLANT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are structures relating to the phloem?
A
Sieve tube elements
B
Sieve plates
C
Companion cells
D
Phloem sap
Explanation: 

Detailed explanation-1: -The phloem sap contains high quantities of sugars, amino acids, vitamins, and organic and inorganic acids. Sugars and amino acids are the major components of the phloem sap.

Detailed explanation-2: -The phloem is composed of three types of cells – the conducting cells, the parenchyma cells and the supportive cells. The conducting cells, also called sieve elements, are composed of columns of sieve tube cells that have perforations in their lateral walls and that helps in the conduction of food throughout the plant.

Detailed explanation-3: -Phloem sap contains water, hormones, sugar and amino acids. During the process of photosynthesis glucose is synthesized and then converted into sucrose. Sucrose is the form of sugar which is translocated in plants.

Detailed explanation-4: -Phloem sap mainly consists of water and sucrose, but other sugars, hormones and amino acids are also present.

There is 1 question to complete.