Zinc finger DNA-binding domains are protein motifs that recognize and bind specific DNA sequences. Comprising zinc ions and amino acids, these structures enable targeted gene regulation. Engineered zinc fingers have applications in gene editing technologies like CRISPR, facilitating precise manipulation of genetic material. This is an MCQ on Zinc Finger […]
A leucine zipper is a structural motif in proteins involved in DNA binding and protein-protein interactions. It consists of repeated leucine residues at regular intervals, forming an alpha helix that can dimerize with a similar helix, often seen in transcription factors regulating gene expression. This is an MCQ on Leucine […]
The helix-turn-helix (HTH) domain is a DNA-binding motif in proteins, typically found in transcription factors. It consists of two alpha helices connected by a short turn. The HTH domain facilitates specific binding to DNA sequences, regulating gene expression in various cellular processes. This is an MCQ on Helix-Turn-Helix (HTH) Domain […]
The helix-loop-helix (HLH) domain is a protein structural motif involved in DNA binding and protein dimerization. Commonly found in transcription factors, it consists of two alpha helices connected by a loop, enabling the formation of homo- or heterodimers essential for gene regulation and cellular processes. This is an MCQ on […]
GPCR, or G protein-coupled receptor, is a cell membrane protein that detects external signals and activates intracellular responses. It plays a crucial role in cell communication, mediating processes such as neurotransmission, immune response, and hormonal regulation in various physiological functions. This is an MCQ on G Protein-Coupled Receptors (GPCRs). | […]
Tertiary structure refers to the overall three-dimensional arrangement of a single polypeptide chain in a protein. It results from the folding and interactions between distant amino acid residues, forming a complex, functional structure crucial for the protein’s biological activity. This is an MCQ on Tertiary Structure of Proteins. | Biochemistry […]
The secondary structure of a protein involves local folding patterns, primarily α-helices and β-sheets, stabilized by hydrogen bonds between amino acids in the polypeptide chain. It contributes to the three-dimensional shape of the protein and influences its function. This is an MCQ on Secondary Structure of Proteins. | Biochemistry Notes […]
Quaternary structure refers to the arrangement of multiple polypeptide subunits in a functional protein. It results from the interaction and assembly of individual subunits, forming a complex structure. The quaternary structure is critical for the overall function and stability of certain proteins. This is an MCQ on Quaternary Structure of […]
The primary structure of proteins refers to the linear sequence of amino acids in a polypeptide chain. It is determined by the specific order of amino acids linked by peptide bonds, forming the backbone of the protein, and is crucial for its overall function and three-dimensional structure. This is an […]