The Mechanisms That Regulate the Loading of Sucrose from the Apoplast

question 4

Multiple Choice

The mechanisms that regulate the loading of sucrose from the apoplast to the sieve- tube members by sucrose- H⁺ symporters are not well understood. Of the following possible regulatory factors, which is least likely to be of direct importance?

• A) sucrose concentration in the apoplast
• B) turgor pressure of sieve- tube members
• C) number of available symporter protein molecules in the plasma membranes of sieve- tube members
• D) density of direct cytoplasmic connections between companion cells and sieve- tube members

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High School

An educational institution for adolescents, typically offering education from grades 9 or 10 through 12, preceding college or university.

Male Aggression

A behavior pattern seen in males, both human and animal, that is characterized by forceful actions or attitudes intended to dominate or control.

Gender Inequality

The societal mechanism through which individuals face unequal and unfavorable treatment in comparable situations due to their gender.