AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

THE SEARCH FOR INHERITABLE MATERIAL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are threadlike structures found in the nucleus?
A
Chromosomes
B
DNA
C
Genes
D
Alleles
Explanation: 

Detailed explanation-1: -The thread-like structure located inside the nucleus of cells of plants and animals is called a chromosome. The term chromosome was first coined by German anatomist Henrich Wilhelm Waldeyer in 1888. Each chromosome is composed of DNA wrapped tightly by proteins called histones.

Detailed explanation-2: -In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Detailed explanation-3: -Chromosomes are threadlike structures made of protein and a single molecule of DNA that serve to carry the genomic information from cell to cell. In plants and animals (including humans), chromosomes reside in the nucleus of cells.

Detailed explanation-4: -A structure found inside the nucleus of a cell. A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.

Detailed explanation-5: -Chromatin is visible as entangled mass of thread like structures. Chromatin is a complex of macro-molecule found in cells, consisting of DNA, protein and RNA.

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