Yes, you can refer to online question banks for practicing Zoology Optional questions. Here are the details:

Benefits of Online Question Banks:
1. Extensive Question Database: Online question banks provide a vast collection of questions from various topics in Zoology. These questions are specifically designed to cover the entire syllabus of the Zoology Optional subject for UPSC exams. By practicing these questions, you can gain a thorough understanding of the subject and improve your problem-solving skills.

2. Topic-wise Segregation: Online question banks categorize the questions based on different topics in Zoology, making it easier for you to practice questions from specific areas. This allows you to focus on your weak areas and allocate your study time accordingly.

3. Varied Question Types: Online question banks include different types of questions such as multiple-choice questions, descriptive questions, and diagram-based questions. This helps you to acquaint yourself with the diverse question patterns that can be expected in the UPSC Zoology Optional exam.

4. Real Exam-like Environment: Many online question banks provide a simulated exam environment where you can attempt timed tests. This helps you to improve your time management skills and get accustomed to the exam pressure. It also provides you with an opportunity to assess your performance and identify areas that require further improvement.

5. Instant Feedback and Explanations: Online question banks often provide instant feedback on your answers, including detailed explanations for each question. This allows you to understand the concepts and reasoning behind the correct answers, helping you to learn from your mistakes and avoid them in the actual exam.

6. Accessibility and Convenience: Online question banks can be accessed anytime and anywhere, as long as you have an internet connection. This flexibility allows you to practice questions at your convenience, making it easier to incorporate regular practice into your study routine.

7. Cost-effective: Many online question banks offer free or affordable subscription plans, making it a cost-effective solution for practicing a wide range of Zoology Optional questions.

In conclusion, referring to online question banks for practicing Zoology Optional questions can be highly beneficial for UPSC aspirants. It provides a comprehensive collection of questions, helps in topic-wise segregation, offers varied question types, simulates the exam environment, provides instant feedback and explanations, and offers convenience and cost-effectiveness. Utilizing these online resources can significantly enhance your preparation and increase your chances of success in the UPSC Zoology Optional exam.