77. Choose from the following answers the correct order of the phases of mitosis

Question

77. Choose from the following answers the correct order of the phases of mitosis A. Prophase, Metaphase, Anaphase, Telophase B. Metaphase, Telophase, Prophase, Anaphase C Prophase, Anaphase, Telophase, Metaphase D. Anaphase, Prophase, Metaphase, Telophase 78. The majority of fe elP produed duringbic celular respiration comes from which the following steps? A. Preparatory reaction B. Citrie Acid Cyele (Krebs Cycle) C. Electron Transport Chain D. Glycolysis 79 Which of the following statements about linked genes is true? A. Linked genes are not inherited independently B. Link ed genes may become separated during crossing over D. Autorntne acrowsing over of linked genes help scientists make maps of genes D. All of the above 80. Lea pigments, do not absorb which color of light? ves appear green because chlorophylls a and b, along with the carotenoid A. Red B. Green C. Blue D. Purple 81. Which of the following everyday objects would most resemble the shape of DNA molecules? A. A twisted rope ladder B. A strand of pearls C. A bowl of Jell-o D. A honeycomb 82. If you were studying an enzymatic reaction and gradually increased the heat of the solution, what would you expect to happen to the rate of product formation? A. Rate would continuously increase across all temperatures B. Rate would initially increase, then sharply drop as temperature got too high C. Rate would continuously decrease D. Rate would remain steady across all temperatures 83. In the cell cycle, most of a cell's time is spent in this phase, where they are carrying out the cell's normal activities, growing, and preparing for division: A. Mitosis B. Cytokinesis C. Interphase D. Prophase 14

Explanation / Answer

Answer for question number 77 : The correct answer is A (Prophase, metaphase, Anaphase and Telophase)

Explanation : Events of mitosis

Prophase : This is the first stage of karyokinesis in which the chromatin network of the nucleus becomes distinctly visible as chromosomes they gradually become short and thick due to spiralization and dehydration. Chromosomes appear distinctly double, because they have already duplicated during the interphase.

Metaphase : During this stage, chromosomes become short and thick with distinct chromatids and their centromeres occupy the equatorial plane of the mitotic apparatus. This plane is called the equatorial / metaphase plane. The lining up of centromeres and the attachments of chromosomal fibers to the centromeres ensure precise separation of chromatids during anaphase.

Anaphase : Anaphase begins with the division of the centromeres and the separation of sister chromatids. The separated sister chromatids are now referred to as chromosomes. Subsequently, each of these single chromosomes move away from each other towards opposite poles of the spindle depending upon the position of the centromeres, the chromosomes appears as V, L, J, or rod shaped when they move towards the poles.

Telophase : Telophase begins when the chromosome reach their spindle poles. The chromosome of each group now begin to stretch out and unwind (despiralization) to become long and thin to revert to a new interphase condition. As this happens, the asters and the mitotic spindle disappear, nucleolus reappears and a nuclear membrane is formed around each chromosome clusters. It marks the end of telophase and karyokinesis. The cell finally enters into a phase of cytokinesis.

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