AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
These form during prophase and attach to chromosomes at the centromere to pull them apart during cell division
A
prophase
B
nucleus
C
spindle fibers
D
gene
Explanation: 

Detailed explanation-1: -Kinetochores are protein formations that develop on each chromosome around the centromere, which is a region located near the middle of a chromosome. Other microtubules bind to the chromosome arms or extend to the opposite end of the cell.

Detailed explanation-2: -The spindle, shown in Figurebelow, consists of fibers made of microtubules. Spindle. The spindle starts to form during prophase of mitosis. Kinetochores on the spindle attach to the centromeres of sister chromatids.

Detailed explanation-3: -Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.

Detailed explanation-4: -Ultrastructural analysis revealed a dense structure of proteins called the kinetochore, which is assembled on the centromere. The kinetochore binds to the mitotic spindle and moves chromosomes along it.

Detailed explanation-5: -Spindle fibres attach to kinetochore of chromosomes during metaphase.

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