DNA (Deoxyribonucleic Acid) is a molecule that carries genetic information in living organisms. It consists of a double helix structure made up of nucleotides containing four bases: adenine (A), thymine (T), cytosine (C), and guanine (G). DNA serves as a blueprint for the development, functioning, and reproduction of cells and […]
RNA, or Ribonucleic Acid, is a molecule essential for various biological processes. It consists of a single strand of nucleotides, including adenine (A), uracil (U), cytosine (C), and guanine (G). RNA plays a central role in protein synthesis, gene expression, and carries genetic information in some viruses. This is an […]
A nucleosome is the basic unit of DNA packaging in eukaryotes. It consists of a segment of DNA wrapped around a core of histone proteins. Nucleosomes help condense and organize DNA, regulating access for processes like transcription and DNA replication. This is an MCQ on Nucleosome Model and Organization of […]
Retroviruses are a type of RNA virus that can reverse transcribe their RNA genome into DNA using the enzyme reverse transcriptase. This DNA is integrated into the host cell’s genome, potentially causing long-lasting infections. HIV is a well-known example of a retrovirus. This is an MCQ on Retrovirus – Example […]
HIV (Human Immunodeficiency Virus) is a retrovirus that attacks the immune system, specifically CD4 cells (T cells), weakening the body’s ability to fight infections and diseases. If left untreated, it can progress to AIDS (Acquired Immunodeficiency Syndrome), a severe, often fatal condition. This is an MCQ on HIV Virus Structure […]