Question

Statement 1: Cryopreservation is one of the best methods of germplasm storage.
Statement 2: In cryopreservation, the cells remain in a state of suspended metabolism.

• A. Statement 1 is True, Statement 2 is True; Statement 2 is the correct explanation for Statement 1
• B. Statement 1 is True, Statement 2 is True; Statement 2 is not the correct explanation for Statement 1
• C. Statement 1 is True, Statement 2 is False
• D. Statement 1 is False, Statement 2 is True

Answer 1

Answer: (A)

Although some microorganisms and higher plant pollen can be freeze dried, suspension of growth in higher plant somatic tissues can be achieved only by transfer to ultra low temperatures such as that of liquid nitrogen. At these temperatures, metabolism is suspended, and free radical damage caused by ionizing background radiation is the only factor potentially causing deterioration.