1. The basic unit of life is:
A. cell
B. tissue
C. organ
D. organism

2. Cell was discovered by:
A. Robert Hooke
B. Newton
C. Dalton
D. Einstein

3. Living cells were first observed by:
A. Leeuwenhoek
B. Hooke
C. Darwin
D. Mendel

4. Cell theory was proposed by:
A. Schleiden and Schwann
B. Dalton and Thomson
C. Newton and Einstein
D. Mendel and Darwin

5. New cells arise from:
A. existing cells
B. air
C. soil
D. water

6. The outer boundary of the cell is:
A. cell membrane
B. nucleus
C. cytoplasm
D. vacuole

7. Cell membrane is:
A. selectively permeable
B. completely permeable
C. impermeable
D. solid wall

8. Plant cells contain:
A. cell wall
B. only membrane
C. only cytoplasm
D. none

9. The control center of the cell is:
A. nucleus
B. mitochondria
C. ribosome
D. vacuole

10. The powerhouse of the cell is:
A. mitochondria
B. nucleus
C. ribosome
D. plastid

11. Ribosomes help in:
A. protein synthesis
B. respiration
C. digestion
D. movement

12. Cytoplasm is:
A. jelly like substance
B. solid structure
C. liquid wall
D. gas

13. Vacuoles store:
A. materials
B. energy only
C. water only
D. oxygen only

14. Plastids are present in:
A. plant cells
B. animal cells
C. bacteria
D. fungi

15. Chloroplast helps in:
A. photosynthesis
B. respiration
C. digestion
D. reproduction

16. Golgi apparatus helps in:
A. packaging materials
B. respiration
C. digestion
D. movement

17. Endoplasmic reticulum helps in:
A. transport of materials
B. digestion
C. breathing
D. movement

18. Prokaryotic cells lack:
A. nucleus
B. cytoplasm
C. membrane
D. ribosome

19. Bacteria are:
A. prokaryotes
B. eukaryotes
C. plants
D. animals

20. Eukaryotic cells have:
A. true nucleus
B. no nucleus
C. only membrane
D. no cytoplasm