• SQL Data Manipulation Language (DML):
• The UPDATE command in SQL is used to modify the values of existing records/rows in a table:

UPDATE table_name SET column1 = value1 WHERE condition;

• Other SQL Commands:
• INSERT: Adds new records to a table.
• SELECT: Queries and retrieves data from a table.
• DELETE: Removes existing records from a table.
• Conclusion: UPDATE (Option 1).

Correct option: (1) UPDATE

• Primary vs. Derived Biological Databases:
• Statement (I): Primary databases accept or include original data from researchers, with relatively little checking or validation. $\implies$ Correct.
• Primary archival databases (GenBank, ENA, DDBJ) accept direct sequence submissions from experimentalists, maintaining archival records without extensive manual curation.
• Statement (II): UniProt, SCOP and TrEMBL are examples of primary protein sequence database. $\implies$ Incorrect.
• UniProtKB/Swiss-Prot is a manually curated secondary/expert database; SCOP is a structural classification database; only PIR and parts of TrEMBL/GenBank are direct translations of primary records.
• Conclusion: Statement (I) is correct but Statement (II) is incorrect (Option 3).

• DDL vs. DML in SQL:
• Data Definition Language (DDL) commands define, alter, and manage database structures (schemas, tables, constraints):
• CREATE TABLE: Creates a new table.
• ALTER TABLE: Modifies table schema/columns.
• DROP TABLE: Permanently deletes a table.
• Data Manipulation Language (DML) / Data Query Language (DQL):
• SELECT is used for querying and retrieving data from tables, not defining schemas.
• Conclusion: SELECT is NOT a DDL command (Option 4).

Correct option: (4) SELECT