ईश्वर चंद्र विद्यासागर ने 'बरना परिचय' नामक पुस्तक लिखी है। यह पुस्तक 1855 में प्रकाशित हुई थी और यह बंगाली भाषा की पहली आधुनिक प्रवेशिका थी। इस पुस्तक ने बंगाली भाषा के प्रचार और प्रसार में महत्वपूर्ण भूमिका निभाई।

Answer: A) Proteins Explanation: Enzymes are protein macromolecules. Enzymes are almost always made of proteins only. Proteins are large biopolymer molecules that are made up of repeating monomer units called amino acids. There are 20 different common amino acids that make up proteins like enzymes. Of these, nine amino acids are essential, which means you must get them from your diet. Enzymes catalyze chemical reactions in biological systems. This means that they speed up the rate of the reaction.

The main differenc between View and Materialized View states that - 1. View means it stores the SQL statement in the database and let you use it as a table. Everytime you access the view, the SQL statement executes. 2. Materialized view means it stores the results of the SQL in table form in the database. SQL statement only executes once and after that everytime you run the query, the stored result set is used. Advantage include quick query results.