8.3 Transport in plants - Pressure Flow Hypothesis

1.

Multiple Choice

30 sec

1 pt

Structure of phloem consists all below, except?

Sieve tube

Tracheids

Companion cell

Sieve plate

2.

Multiple Choice

30 sec

1 pt

What is the most abudant solute in phloem sap?

starch

glucose

sucrose

water

3.

Multiple Choice

30 sec

1 pt

Process in which organic substances are moved to the rest of plant by phloem is known as

transpiration

cellular respiration

photosynthesis

translocation

4.

Multiple Choice

45 sec

1 pt

What happens FIRST during translocation in the phloem?

water enters the sieve tubes from xylem vessel by osmosis

sucrose enters the sieve tubes from source cell by active transport

water leaves the sieve tubes to xylem vessel by osmosis

sucrose leaves the sieve tubes to sink cell

5.

Multiple Choice

30 sec

1 pt

Which of the following allows transport of sucrose from a sieve tube to a companion cell?

sieve plate

plasmodesmata

cell wall

pits

6.

Multiple Choice

45 sec

1 pt

Translocation may occur as describe in Pressure Flow hypothesis. The pressure involved in this hypothesis originates from

The root pressure

Transpirational pull in the leaves

Accumulation of sucrose in sieve tube

The intake of water by sieve tube from xylem vessel by osmosis

7.

Multiple Choice

45 sec

1 pt

The Pressure Flow hypothesis for phloem translocation states..

that sink strength drives transport in the pholem

that transport in companion cell is pressure dependent

the water potential gradient in the sieve tube drives phloem transport

the pressure gradient between the sieve tube at the source and the sink drives phloem transport

8.

Multiple Choice

30 sec

1 pt

What molecule is the phloem responsible for transporting?

Glucose

Fructose

Sucrose

Starch

9.

Multiple Choice

45 sec

1 pt

What is the best words to describe source and sink cell?

Both are plants organ and act as storage

Sink cell can be either fruit or leaves and source cell is root

Source cell act as site for sugar production and sink cell will store sugar

Companion cell carry sucrose from a source cell to a sink cell

10.

Multiple Choice

45 sec

1 pt

In a tree during normal condition, it is expected that the sugars produced by the tree would flow from (i)____________ to (ii)__________________.

Choose the option that would correctly fill in the terms in the sentence above.

(i) a leaf (ii) a growing fruit

(i) the root (ii) a leaf

(i) the root (ii) a growing fruit

(i) a growing fruit (ii) a leaf

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