Question

When beet root slices are washed and then placed in cold water, anthocyanin does not come out, because plasma membrane is

• A. Differentially permeable to anthocyanin
• B. Dead structure
• C. Impermeable to anthocyanin
• D. Permeable to anthocyanin

Answer 1

The correct option is C Impermeable to anthocyanin

The plasma membrane is thus differentially permeable because it differentiates among solute particles and allows entry to only selected solute particles. In general plasma membrane is permeable to lipophilic substances and impermeable to hydrophilic substances. Anthocyanins are hydrophilic pigments localized in cell vacuole and hence cannot cross the plasma membrane barrier till the membrane is disrupted.

So, the correct answer is 'Impermeable to anthocyanin'.