Question

Tonoplast, the membrane of the vacuole is a
(a)Living membrane
(b)Non-living membrane
(c)Impermeable
(d)Permeable and rigid

Answer 1

Hint: It's the cytoplasmic membrane surrounding a vacuole. As a membrane, it's predominantly associated with directing the developments of ions around the cell and disengaging materials that might be unsafe or a danger to the cell.

Complete answer:
Tonoplast or vacuolar membrane is the living membrane of the vacuole. It separates the vacuolar contents from the cell's cytoplasm. It helps the vacuole in maintaining the osmoregulatory inside the cell.

Additional Information: The proton pumps at the tonoplast direct the turgor pressure in collaboration with auxiliary dynamic transporters, so water influx into the vacuole is constrained by the organized activity of different carriers. Proton pumps additionally invigorate auxiliary vehicles to empower the capacity of proteins, metabolites, and storage of cytotoxic compounds like complex-bound heavy metals. The end of ${ Ca }^{ 2+ }$ signaling is another significant capacity of the tonoplast carriers that somewhat requires stimulation by vacuolar proton pumps to drive take-up by ${ Ca }^{ 2+ }$/H antiporters.
By increasing in size, vacuoles allow the germinating plant or its organs (such as leaves) to grow very quickly and consume mostly just water. In seeds, put away proteins required for germination are kept in 'protein bodies', which are changed vacuoles.
So the correct answer is ‘Living membrane’.

Note: A number of the products stored by vacuoles have a metabolic function. for instance, succulent plants open their stomata and take up ${ CO }_{ 2 }$ within the dark (when transpiration losses are but in the day) and convert it to malic acid. This acid is stored in vacuoles until the subsequent day when light energy is often wont to convert it to sugar while the stomata are kept shut. Especially, they will sequester substances that are potentially harmful to the plant cell, if they're present in bulk within the cytoplasm.