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Published on: 13/05/2022
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Questions + Answers key
Take MCQ Science Test1.
Differentiate Embryonic and Adult stem cells.
2.
Give the importance of Stem cell therapy?
3.
List the objective of animals breeding?
4.
What is rDNA?
5.
What is Inbreeding depression?
1.
|
S.No |
Embryonic stem cells |
Adult stem cell/ Somatic stem cells |
|---|---|---|
| (i) | They can be extracted and cultured from early embryos and are derived from inner cell mass of the blastocyst. | They are found in the newborn and adults. |
| (ii) | They can be developed into any cell in the body. | They have the ability to divide and give rise the specific cell types. |
2.
(i) Sometimes cells, tissues and organs in the body may be permanently damaged or lost due to genetic condition or disease or injury.
(ii) In such situations stem cells are used for the treatment of diseases which is called Stemcell therapy.
(iii) In treating neuro degenerative disorders like Parkinson's disease and Alzheimer's disease neuronal stem cells can be used to replace the damaged or lost neurons.
3.
(i) Animal breeding aims at improving the genotypes of domesticated animals to increase their yield and improve the desirable qualities to produce milk, egg and meat.
(ii) When breeding takes place between animals of the same breed, it is called inbreeding. The cross between different breeds is called out breeding.
4.
(i) Genetic engineering is the manipulation and transfer of genes from one organism to another organism to create a new DNA called as recombinant. DNA (rDNA).
5.
Continued inbreeding reduces fertility and productivity. Inbreeding exposes harmful recessive genes that are eliminated by selection.
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
