Q. Which of the following functions as cell identity markers, receptors, and enzymes?
1. Proteins found in intercellular junctions
2. proteins involved in cytoskeletal anchoring
3. Proteins associated with membrane
4. Proteins found in plasma and mucus secretions
Answer: 3 (Proteins associated with membrane).
Q. The alpha-helix and beta-sheet are found at which level of protein organization?
Q. What level of protein structure is associated with the sequence of amino acids?
Q. Which of the following are characteristics of G protein-coupled receptors (GPCR)?
Q. What are the second messengers in the GPCR-phospholipase c signal transduction system?