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Biology · CELL THE UNIT OF LIFE

हिन्दी

Rudolf Virchow gave the final shape to the cell theory in 1855 by modifying the original hypothesis. What crucial concept did he contribute?

  1. All living organisms are made up of non-membrane bound protoplasm only
  2. Cells divide and new cells arise from pre-existing cells (Omnis cellula-e cellula)
  3. The plasma membrane is the primary delimiting structure containing naked genomic DNA
  4. Centrosomes coordinate the spontaneous de novo generation of cellular organelle systems

Correct answer · Option 2

Cells divide and new cells arise from pre-existing cells (Omnis cellula-e cellula)

Explanation

Virchow explained that cells divide and new cells arise from pre-existing cells (Omnis cellula-e cellula), completing the classical cell theory.

Related questions

In a diploid human somatic cell, approximately two metres of DNA is packaged within the nucleus into 46 chromosomes. What is the fundamental biochemical composition of interphase chromatin?→In plant cells, the tonoplast plays a crucial physiological role by facilitating the transport of a number of ions and other materials. What is the direction and nature of this transport relative to concentration gradients?→Given below are two statements:\n Statement I: The ribosomes of chloroplasts are 70S, which are smaller than the cytoplasmic 80S ribosomes of eukaryotic cells.\n Statement II: The inner membrane of the chloroplast is comparatively more permeable to solutes than its outer membrane. \nIn the light of the above statements, choose the most appropriate answer from the options given below:→Consider the following statements regarding the formulation of cell theory: (A) Matthias Schleiden concluded that the presence of cell wall is a unique character of plant cells. (B) Theodore Schwann studied different types of animal cells and observed a thin outer layer known as plasma membrane. (C) Schleiden and Schwann together formulated the cell theory but could not explain how new cells were formed. Which of the above statements are correct?→
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