Question 1.Newly formed DNA copies may not be identical at times. Give one reason. (AI2017)Answer:When a cell reproduces, DNA replication occurs which results in formation of two similar copies of DNA. The process of copying the DNA leads to some variations each time. As a result, the DNA copies produced are similar to each other …
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Previous year questions, Ray Optics, Class 12, CBSE, Physics, Chapter 9 Ray Optics and Optical Instruments Class 12 Important Questions Very Short Answer Type Question 1.Aglasslensof refractive index 1.5 is placed in a trough of liquid. What must be the refractive index of the liquid in order to mark the lens disappear? (Delhi 2008)Answer:In order …
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