Vitrification prevents ice crystal damage in cryopreservation by forming a glass-like water state. This article explains Q.52 with the correct answer and all options for biotech exam prep.

Correct Answer

The correct answer is (A) Vitrification.

Vitrification rapidly cools water with cryoprotectants, bypassing ice formation to create a stable, amorphous glassy state. This avoids mechanical damage from crystals during cryopreservation of cells, tissues, or embryos.

Option Breakdowns

(A) Vitrification

Vitrification uses ultra-rapid cooling and high solute concentrations to increase viscosity, solidifying water into non-crystalline glass.
It eliminates ice-related injuries, making it superior for biological preservation.​

(B) Hyperhydricity

Hyperhydricity describes abnormal watery, vitrified plant tissues from stressed culture conditions like high hormones.​
It refers to tissue state, not the controlled water transition in cryopreservation.​

(C) Cryoprotectant

Cryoprotectants are chemicals (e.g., DMSO, glycerol) that prevent ice formation by altering water properties.
They enable vitrification but are not the glassy state transition itself.​

(D) Habituation

Habituation means plant cells losing hormone dependence in tissue culture over time.​
Unrelated to cryopreservation or water phase changes.​