What Would Happen If Casparian Strips Were Not Present and Water

question 16

Multiple Choice

What would happen if Casparian strips were not present and water and minerals could pass between endodermal cells of the plant root rather than through endodermal cells?

• A) The minerals would enter the conduction vessels of the vascular cylinder much more rapidly.
• B) An increased concentration gradient of the minerals in the extracellular space of the vascular cylinder would be better maintained.
• C) Minerals would leak back out of the extracellular space of the vascular cylinder as fast as they were pumped into it.
• D) Root hairs would lose their ability to take up minerals.
• E) Too much energy would be needed to move the minerals between endodermal cells.

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Definitions:

Euchromatic Regions

Areas of chromosomes that are less condensed during interphase, rich in gene activity and accessible for transcription.

Transcriptionally Active

Describing a state in which DNA is being actively copied into RNA by RNA polymerase, indicating active gene expression.

Genes

Sequences of DNA that code for proteins or functional RNA molecules, playing crucial roles in determining traits.

Repressed

Psychologically, referring to thoughts, memories, or desires that are kept out of conscious awareness. Biologically, it can refer to the inhibition of gene expression or enzymatic action.