Pressure Flow Hypothesis

Transport of sucrose from source to the sink is

• Translocation

• Transpiration

• Respiration

• Photosynthesis

Tags

NGSS.HS-LS2-3

Which of the following functions as a source during translocation in plants?

• Merismetic tissue in the root

• Leaves

• Roots

• Fruits and flowers

Transport of sucrose from source to sink is via

• tracheid & vessel element

• sieve tube & companion cell

• xylem

• plasmodesmata

Tags

NGSS.HS-LS2-3

Which of the following is NOT functions as a sink during translocation in plants?

• Shoots

• Roots

• Leaves

• Fruits

The loading of sucrose into sieve tubes is by ________ transport and consequently, requires ___________.

• Active; ATP

• Passive; energy

• Active; ions

• Passive;ions

Some part of plant is called as source is due to the process of

• Cellular respiration

• Photosynthesis

• Transpiration

• Photorespiration

Tags

NGSS.HS-LS1-5

Why glucose converted to sucrose before translocation occur?

• Sucrose is large molecule

• Sucrose is non-reducing sugar

• Sucrose is reducing sugar

• Sucrose is insolluble in water

In the pressure flow hypothesis, sucrose is loading into the sieve tube by

• osmosis

• passive transport

• active transport

• diffusion

What is the important of companion cell between source and sieve tube?

• Provide glucose for active transport

• Provide ATP for active transport

• Provide ATP for passive transport

• Provide glucose for passive transport

Tags

NGSS.HS-LS2-3

Loading of sucrose actively in the sieve tube will causes

• Water pressure in sieve tube decrease

• Accumulation of sucrose in sieve tube and water potential remain unchanged

• Sucrose dissolved in water and lowered the water potential in sieve tube

• Sucrose converted into dissolved glucose which lowered the water potential in sieve tube