NEW
Font size
WorksheetsPlant Physiology: Translocation in the Phloem and distribution
Total questions: 15
Worksheet time: 8mins
What is the main function of translocation in plants?
A) Transporting water and minerals
B) Distributing organic solutes
C) Facilitating gas exchange
D) Generating energy through photosynthesis
Which components are fundamental for phloem transport?
A) Xylem and companion cells
B) Sieve elements and companion cells
C) Xylem and sieve elements
D) Companion cells and mesophyll cells
What defines a "source" in the context of phloem transport?
A) An organ that stores excess photosynthates
B) A non-photosynthetic tissue in the plant
C) A region producing more photosynthate than it uses
D) An organ that primarily consumes photosynthates
Which sugar is most commonly transported in the phloem?
A) Glucose
B) Mannitol
C) Sucrose
D) Fructose
What protective mechanisms are employed in the phloem to deal with damage?
A) Chloroplast reorganization
B) Activation of mitochondria
C) P protein and callose deposition
D) Enzymatic breakdown of sugars
What drives the process of phloem transport according to the Pressure-Flow Model?
A) Electrical impulses
B) Osmotically generated pressure gradient
C) Enzymatic reactions
) Physical pressure from neighboring cells
Which process involves the movement of sugars into the sieve elements and companion cells?
A) Phloem loading
B) Phloem unloading
C) Symplastic transport
D) Apoplastic pathway
What characterizes the main solute transported in phloem?
A) Mainly amino acids
B) Mainly inorganic ions
C) Predominantly carbohydrates
D) Exclusively proteins
What is the average velocity of translocation in the phloem as per the Pressure-Flow Model?
A) 1 meter per day
B) 1 meter per hour
C) 1 meter per minute
D) 1 meter per second
Which cells are specifically responsible for the energy provision required for active transport in the phloem?
A) Ordinary companion cells
B) Transfer cells
C) Sieve tube elements
D) Intermediary cells
What are the main components of the phloem involved in the transport process?
A) Sieve elements and tracheids
B) Sieve elements and companion cells
C) Companion cells and tracheids
D) Xylem and sieve elements
Which of the following defines a "sink" in phloem transport?
A) A region producing surplus photosynthates
B) An organ primarily responsible for photosynthesis
C) A non-photosynthetic tissue requiring additional nutrients
D) A region receiving and utilizing transported materials
What specialized feature allows cytoplasmic connections between sieve elements?
A) Sieve plates
B) Companion cells
C) P proteins
D) Tracheids
What is the primary function of companion cells in the phloem transport system?
A) Actively transporting water and minerals
B) Storing excess sugars and starch
C) Providing energy for cellular respiration
D) Synthesizing carbohydrates during photosynthesis
How does the Pressure-Flow Model account for the movement of solutes in the phloem?
A) Via diffusion
B) Through bulk flow driven by pressure gradients
C) By active transport mechanisms
D) Via transmembrane channels
