Class 12 Biology – Online MCQ Exam

1. Which of the following is a connective tissue?

Epithelial tissue
Muscular tissue
Blood

2. Which plant hormone is responsible for cell elongation?

Cytokinin
Auxin
Ethylene

3. Which organelle is known as the 'powerhouse of the cell'?

Chloroplast
Mitochondria
Nucleus

4. Which of the following is a vestigial organ in humans?

Appendix
Kidney
Heart

5. What is the mode of reproduction in Hydra?

Budding
Fragmentation
Binary fission

6. What is the basic unit of heredity?

RNA
Gene
Chromosome