At cryopreservation of germplasm, biological activitya)Essentially ceasesb)Cell division stopsc)No genetic change occursd)All of the aboveCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Cryopreservation is a long-term storage technique with very low temperatures to preserve the structurally intact living cells and tissues for an extended period of time at a relatively low cost. Cryopreservation is to preserve and store the viable biological samples in a frozen state over extended periods of time.Technology and prospects of cryopreservation of germplasm , medium periodically; the freeze storage would suppress cell division and thus the need cells are in a non-metabolic state, which delays or virtually stops the 'ageing' process.

Answer

Cryopreservation of germplasm means that storage of biological material at ultra low temperature of liquid , -196 degree Celsius . in this process all metabolic activity ceased.

Answer

At cryopreservation of germplasm, biological activity essentially ceases, cell division stops, and no genetic change occurs.

Explanation:

Cryopreservation is the process of preserving cells, tissues, or organs at very low temperatures, typically below -130°C, in order to maintain their viability and functionality. It is commonly used for the long-term storage of germplasm, which includes sperm, eggs, embryos, and plant seeds.

Biological activity essentially ceases:
When germplasm is cryopreserved, the low temperature halts most biological activities within the cells. Metabolic processes slow down significantly or stop altogether, including enzymatic reactions, protein synthesis, and membrane transport. As a result, the overall biological activity of the cells essentially ceases.

Cell division stops:
One of the main consequences of cryopreservation is the cessation of cell division. The low temperature inhibits the normal cell cycle progression, causing cells to enter a dormant state. This dormancy prevents further cell division and growth, ensuring the preservation of the genetic material without any changes.

No genetic change occurs:
Cryopreservation is designed to maintain the genetic integrity of the preserved germplasm. The freezing process itself does not induce any genetic changes or alterations in the DNA sequence. The cells are stored in a state of suspended animation, where the genetic material remains stable and intact.

All of the above:
Therefore, all three options mentioned in the question are correct. Cryopreservation of germplasm causes biological activity to essentially cease, cell division to stop, and ensures no genetic change occurs. This allows for the long-term storage of valuable genetic resources, which can be utilized for various purposes such as assisted reproduction, biodiversity conservation, and breeding programs.

In conclusion, cryopreservation is a highly effective technique for preserving germplasm, as it maintains the viability and genetic integrity of the stored material by ceasing biological activity, halting cell division, and preventing any genetic changes.

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

DPP: Daily Practice Problems for NEET

Top Courses for NEET

Top Courses for NEET

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company