(C) The centromere is a specialized $DNA$ sequence of a chromosome that links a pair of sister chromatids. During cell division,it is the site where t

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(C) The centromere is a specialized $DNA$ sequence of a chromosome that links a pair of sister chromatids. During cell division,it is the site where the kinetochore assembles. Because the centromere appears as a constricted region on the chromosome,it is referred to as the $Primary \ constriction$. Secondary constrictions are other regions of the chromosome that do not involve the centromere.

Class 11 Biology Cell: The Unit of Life Nucleus and Chromosomes

Easy

The centromere is also known as $.......$.

A
Kinetochore
B
Secondary constriction
C
Primary constriction
D
Chromonema

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Class 11 Questions

Class 11

Biology Questions

Chapter

Cell: The Unit of Life

Subtopic

Nucleus and Chromosomes

Which of the following is a membrane-less organelle?

Easy

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The diagrammatic representation of chromosomes is known as .........

Easy

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Match List-$I$ with List-$II$:

List-$I$ List-$II$

$(a)$ Metacentric chromosome $(I)$ Centromere situated close to the end forming one extremely short and one very long arm

$(b)$ Acrocentric chromosome $(II)$ Centromere at the terminal end

$(c)$ Sub-metacentric $(III)$ Centromere in the middle forming two equal arms of chromosomes

$(d)$ Telocentric chromosome $(IV)$ Centromere slightly away from the middle forming one shorter arm and one longer arm

Choose the correct answer from the options given below:

List-$I$	List-$II$
$(a)$ Metacentric chromosome	$(I)$ Centromere situated close to the end forming one extremely short and one very long arm
$(b)$ Acrocentric chromosome	$(II)$ Centromere at the terminal end
$(c)$ Sub-metacentric	$(III)$ Centromere in the middle forming two equal arms of chromosomes
$(d)$ Telocentric chromosome	$(IV)$ Centromere slightly away from the middle forming one shorter arm and one longer arm