21 A) bacteria 22. A) bacteria 23. B) archaea C) eukaryote D) prokaryotes E) vir

Question

21 A) bacteria 22. A) bacteria 23. B) archaea C) eukaryote D) prokaryotes E) viruses B) archaea eukaryote D) prokaryotes E viruses archaea B) archaea A) bacteria C) eukaryote E) viruses During the f ormation of gametes in human, the reproductive cells first undergo a cell division that These same cells undergo the second cell division that is called 25 before cled 24 becoming gametes B) mitosis C) binary fission D) cytokinesis E) budding 25. A) meiosis B) mitosis C) binary fission okinesis E) budding The human chromosome in a diploid cell that does not have a homolog chromosome is the chromosome; and this same chromosome carries genes in a region called homolog to a region found in the human 26 27 and this region is 28 chromosome. 26. A) autosome B) sex-linked C)Y D)X E) pseudoautosome 27. A) autosome B) sex-linked C)Y D)X E) pseudoautosome 28. A) autosome B) sex-linked C)Y DX E) pseudoautosome Eukaryote organism's nuclear genome in a cell is housed in an organelle called 29 The transport proteins that shuttle molecules through the pores of organelle that house the nuclear genome into the cytosol of the cells is called 30_ 29. A) mitochondria B) chloroplast C) proteases D) nucleus E) nucleolus 30. A) exportins B) proteins C) cytoskeleton D) actins E) ATP In eukaryotic cells, there are three types of genome, and two of the genomes have a non-linear DNA structural shape and the non-linear structural shape has a 31 shape. The non-linear structural shape is also found in prokaryotic organisms and these prokaryotic organisms are called 32 The polytene chromosomes are found in the cells of the salivary glands of 33 Human pictorial chromosomes can be visualized and identified by 34_ 31. A) helix B) spiral C) roiled-like D) elongated E) circular 32. A) virus B) amoeba ) plants D) algae E) bacteria

Explanation / Answer

24. A) Meiosis is a type of cell division characterised by reduction in the number of chromosomes. the diploid germ cells undergoes meiosis to create haploid gametes that have half the number of chromosomes as many present in the parent cell.

25. B) the haploid cells formed after the meiotic division of germ cells undergoes mitosis to yield gametes.

26. C) Y chromosome does not pairs with the X-chromosome as they differ in their size and genetic content. Hence Y chromosome does not has a homolog chromosome.

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