Biology MCQs (Multiple Choice Questions) with answers for various state exams and UPSC civil services, SSC, banking, MPSC, UPPSC, MPPSC etc. Competitive Exams. Learn and prepare Objective type Questions on Biology.
1. The fundamental structural and functional unit of all living organisms is
Tissue.
Cell.
Organ.
Mitochondria.
Answer: (b) Cell.
Solution: All organisms are composed of cells. A cell is the fundamental structural and functional unit of all living organisms.
2. Which one of the following is the powerhouse of the cell?
Vacuoles.
Nucleus.
Mitochondria.
Ribosome.
Answer: (c) Mitochondria
Solution: The mitochondria are the powerhouse of the cell. It is the site of aerobic respiration. It produces cellular energy in the form of ATP.
3. Who discovered the live cell for the first time?
Anton Von Leeuwenhoek.
Robert Brown.
Theodore Schwann.
Rudolf Virchow.
Answer: (a) Anton Von Leeuwenhoek.
Solution: The first live cell is discovered by Anton Von Leeuwenhoek, who described its structure.
4. The suicide bag of a cell is
Endoplasmic Recticulum.
Lysosome.
Plastid.
Mitochondria.
Answer: (b) Lysosome.
Solution: The lysosome has been found to be rich in all types of hydrolytic enzymes like lipases, proteases, and carbohydrases, which are optimally active at the acidic ph. These enzymes are capable of digesting carbohydrates, proteins, lipids, and nucleic acid present in the cell if it leaks, thus called the suicide bag of a cell.
5. Which of the following is not the type of plastids?
Chlorophylls.
Chloroplasts.
Leucoplasts.
Chromoplasts.
Answer: (a) Chlorophylls.
Solution: The plastids are present in all plant cells and euglenoids. They bear some pigments, thus imparting specific colours to the plants. The types of plastids are chloroplasts, chromoplasts, and leucoplasts.