श्रमाचे महत्व निबंध लिहा
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Answer:
Heredity and hereditary changes
You know that here dity is the transfer of biological characters from one generation to
another via genes. Johann Gregor Mendel is pioneer of the modern genetics. Around the period
of 1886, it took a long time for him to understand the conclusions of his research about
heredity. In 1901, the reasons behind the sudden changes were understood due to the mutational
theory of Hugo de Vries. Meanwhile in 1902, Walter and Sutton observed the paired
chromosomes in the cells of grasshopper; until then it was not known to anyone. Research
started in the direction of finding the nature of genetic material when it was proved that genes
are carried via chromosomes. Through which 1944, trio of scientists Ostwald Avery, Mclyn
McCarthy and Colin MacLeod proved that except viruses, all living organisms have DNA as
genetic material.
In 1961, the French geneticists Francois Jacob and Jack Monad proposed a model for
process of protein synthesis with the help of DNA in bacterial cells. It helped to uncover the
genetic codes hidden in DNA. Thereby, the technique of recombinant DNA technology
emerged which has vast scope in the field of genetic engineering.
The science of heredity is useful for diagnosis, treatment and prevention of hereditary
disorders, production of hybrid varieties of animals and plants and in industrial processes in
which microbes are used.
Transcription, Translation and Translocation
With the help of RNA, the genes present in the form of DNA participate in the functioning
of cell and thereby control the structure and functioning of the body. Information about protein
synthesis is stored in the DNA and synthesis of appropriate proteins as per requirement is
necessary for body. These proteins are synthesized by DNA through the RNA. This is called
as ‘Central Dogma’. mRNA is produced as per the sequence of nucleotides on DNA. Only one
of the two strands of DNA is used in this process. The sequence of nucleotides in mRNA being
produced is always complementary to the DNA strand used for synthesis. Besides, there is
uracil in RNA instead of thymine of DNA. This process of RNA synthesis is called as
‘transcription’.
Answer:
आजचे युग हे विज्ञान संगणक युग मानले जाते. या संगणक युगात आपण सर्वजण वावरत आहोत. आज संगणक युगामुळे मानवाचे जीवन अगदी सुलभ झाले आहे. त्यामुळे मानव सगळी कामे यंत्राच्या साहाय्याने करू लागला आहे.
त्यामुळे काम करून घाम गाळणाऱ्यांची संख्या दिवसेंदिवस कमी होत चालली आहे. त्यामुळे शारीरिक श्रम करणाऱ्या श्रमिकांना आज यंत्र युगाच्या काळात निकृष्ट मानले जात आहे. असे करणे म्हणजे एक प्रकारे श्रमाचा आणि श्रमिकांचा अपमान आहे.
बौद्धिक कष्टा इतकेच शारीरिक कष्ट करणे सुद्धा महत्वाचे आहे. कष्ट केल्यानेच माणसाची प्रगती होते. तसेच जीवनामध्ये यशस्वी होण्यासाठी सुद्धा श्रम करणे महत्वाचे आहे.
श्रम म्हणजे काय –
श्रम म्हणजे जेव्हा एखादी व्यक्ती आपले ध्येय व स्वप्न पूर्ण करण्यासाठी शारीरिक किंवा बौद्धिक कष्ट करते व मेहनत करते त्याला एका अर्थाने काम करणे असे म्हटले जाते. श्रम करण्यामागे ध्येय मिळवण्याचा विचार असतो.
Explanation:
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