CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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One long DNA molecule.
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One long RNA molecule.
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One long sequence of amino acids.
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A single gene for a protein.
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Detailed explanation-1: -Each chromosome consists of a single, enormously long linear DNA molecule associated with proteins that fold and pack the fine DNA thread into a more compact structure. The complex of DNA and protein is called chromatin (from the Greek chroma, “color, ” because of its staining properties).
Detailed explanation-2: -Each chromosome contains a long molecule of DNA. Each DNA molecule contains many genes. A gene is a segment of a DNA molecule that gives the instructions for making a protein. Different versions of the same gene are called alleles.
Detailed explanation-3: -DNA consists of two long polymers (called strands) that run in opposite directions and form the regular geometry of the double helix. The monomers of DNA are called nucleotides. Nucleotides have three components: a base, a sugar (deoxyribose) and a phosphate residue.