Question

Mention the information source for making proteins in a cell.Mention the basic events in the process of reproduction

Answer 1

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• Cellular DNA is the information source for making proteins in the cell.

• The basic event in reproduction is the creation of a DNA copy. Cells use chemical reactions to build copies of their DNA. This creates two copies of the DNA in a reproducing cell, and they need to be separated from each other. For this it is necessary to create an additional cellular structure. Then, DNA copies separately move to these two cells.

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Answer 2

ANSWER:

The source which provides information for making proteins are the DNA which are present in the cell.

The cell organelle called the ribosomes helps in the production of proteins required by the cell and the body to perform its functions.

The fundamental events that occurs during reproduction are :

1. Pre-fertilisation events : In this stage, gametogenesis, that is, formation of female and male gametes occurs.

2. Fertilisation : Here the female and male gametes which are haploid combines together. In humans, fertilisation is internal, that is, it occurs inside the body itself.

3. Post-fertilisation : Formation of zygote occurs. This structure is diploid in nature.