DNA Structure & Human Genome Sequencing — NEET Biology
📚 Practice ConceptIn the last section, the essentials of human genome sequencing and its consequences will also be discussed. Let us begin our discussion by first understanding the structure of the most interesting molecule in the living system, that is, the DNA. In subsequent sections, we will understand that why it is the most abundant genetic material, and what its relationship is with RNA.
Which of the following statements concerning the organization and function of the human genome are NOT correct? S1: The vast majority of the human genome, specifically less than 2%, is composed of non-coding sequences like introns and repetitive DNA. S2: Repetitive DNA sequences, though lacking direct coding functions, are crucial for understanding chromosome structure, dynamics, and evolutionary patterns. S3: Single Nucleotide Polymorphisms (SNPs) are variations occurring in non-coding regions of DNA and are utilized in genetic mapping. S4: All genes in the human genome consist of continuous coding sequences (exons) without any interspersed non-coding regions. S5: The "central dogma" of molecular biology explains that genetic information flows exclusively from DNA to RNA to protein, with no exceptions in any living system.
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