51. The synthesis of two strands of DNA takes place in the
52. The arm ratio is high in which of the following types of chromosomes?
53. The largest cell in the human body is
54. Consider the following statements regarding the pachytene substage of prophase I during meiosis and choose the correct answer:
1. Pachytene is said to begin when synapsis is completed
2. During pachytene the chromosomes are associated in bivalents or tetrads
3. Shortening and thickening of the chromosomes takes place due to longitudinal contraction
4. Exchange of groups of genes takes place as a result of crossing over
1. Pachytene is said to begin when synapsis is completed
2. During pachytene the chromosomes are associated in bivalents or tetrads
3. Shortening and thickening of the chromosomes takes place due to longitudinal contraction
4. Exchange of groups of genes takes place as a result of crossing over
55. Which cell organelle performs the principal function of packaging materials?
56. The single stack of Golgi apparatus found in plants and fungi is
57. In prokaryotic organisms, nuclear region is not surrounded by a membrane. This undefined nuclear region is known as
58. Which of the following is an exception to cell theory?
59. Eukaryotic ribosomes are called
60. Crossing over occurs during meiosis at
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