Here are the answers to your questions based on the properties of spider silk:
Question 1:
Response: Biodegradable, elastic, high tensile strength, biocompatible/non-allergenic
Question 2:
Response: False, various strands have different properties to play different roles in the web.
Question 3:
Response: Glycine
Question 4:
Response: Dragline silk
If you need further explanations or details about each answer, feel free to ask!