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प्रश्न
Explain the role of DNA in the process of reproduction of the cell.
उत्तर
DNA plays an important role in the reproduction of a cell. The reproducing cell produces an identical copy of DNA through some cellular mechanism. Since the newly formed copy of DNA lacks an organised cellular structure, the cell gets divided to provide cell cover to the newly formed DNA. Thus, two daughter cells are formed from the single cell as a result of the copying of DNA.
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संबंधित प्रश्न
Name the scientist who put forward the most popular model of DNA.
Define reproduction.
In the list of organisms given below, those which reproduce by the asexual method are :
(i) banana
(ii) yak
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)
Fill in the following blank with suitable word :
The union of a sperm nucleus with an egg nucleus is known as.......... and results in a .........egg.
Find the odd-one out, giving reason.
Gamete, budding, fragmentation, regeneration.
Multiple choice question.
In angiosperms, endosperm is formed by/ due to ______
Self-incompatibility is found in flowers of plants _______.
The example of dicot endospermic seed is ______.
What is hilum with respect to ovule?
Assertion and Reason types of Question.
Assertion: In potatoes, shoot arises from eyes.
Reason: Eyes represent the buds.
