Class 8th General Science unit 2/3

Heredity-in-organisms-class-8th-general-science-unite-2-3

Unit 2. Heredity in organisms and unit 3. Biotechnology

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General Science class 8th unit 2/3

Class 8th General Science Mcqs and online quiz

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1. A parent cell divides into two daughter cell that the number of chromosomes in daughter cell remains the same parent cell.

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2. Increase the number of body cells during growth and development.

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3. _____ involves a single division.

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4. A parent cell divides into four daughter cells (gametes) that the number of chromosomes in daughter cell is half so that of the parent.

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5. Occurs in the germ cells of an organism.

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6. daughter cells are genetically different.

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7. Involved double cell divisions.

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8. are thread-like structures present in the nucleus of each cell.

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9. are made up of DNA and a protein called Histone.

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10. is coiled many times around proteins, which provides structural support to the chromosomes.

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11. is made of units called Nucleotides.

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12. The four types of nucleotides are adenine, guanine, cytosine, thymine.

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13. A gene is the basic physical and functional unit of heredity.

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14. The transfer of characteristics from parents to offspring is called

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15. Chromosomes, DNA, and Genes form the basis of heredity.

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16. Humans have 23 pairs of

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17. The use of living organisms or their products for the welfare of mankind.

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18. is the basic heredity material in living organisms and is responsible for the transfer of characters from one generation to the next generation.

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19. DNA has the unique property to replicate itself.

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20. DNA makes similar copies of itself.

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21. takes place in the nucleus during cell division.

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22. is a hereditary material, which carries all the information from parents to the offsprings.

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23. is the basic structural and functional unit of heredity.

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24. occur in pairs and are located on chromosomes.

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25. Each heredity character is an organism is control by a pair of _____

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26. are colored bodies present in the nucleus. They are visible as thread-like structures.

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27. Each chromosome is made up of DNA, coiled many times around a protein called

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28. Bacteria (Singular Bacterium) don't contain a

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29. Each bacterial has a single chromosome present in the cytoplasm along with an extra chromosomal DNA molecule called

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30. can be easily isolated from a bacterial cell and a gene can be attached with it.

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31. can carry a foreign gene into the bacterium. Plasmid acts as a foreign carrier of a foreign gene.

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32. contains a foreign gene in its cell.

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33. In a human cells, there are more than one thousand genes on a

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34. divides to form two daughter cells within 20 minutes.

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35. A restriction enzyme is used to cut the gene from the DNA of

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36. The attached gene and plasmid DNA are collectively called

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37. The bacterium which takes in the recombinant DNA is called genetically modified bacterium GM bacterium or

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