Chapter 8: Cell The Unit of Life — Online MCQ Test
BIOLOGY · CLASS 11 FIRST PUC · Karnataka State Board
Practice Chapter 8: Cell The Unit of Life with a free chapter-wise online MCQ test.
This chapter covers: Cell Theory Prokaryotic Cell Eukaryotic Cell Cell Membrane Nucleus Cytoplasm Cell Organelles Mitochondria Ribosome Endoplasmic Reticulum.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 8: Cell The Unit of Life — Important Questions & Answers
Who proposed the cell theory?
- A. Schleiden and Schwann
- B. Darwin and Wallace
- C. Mendel and Morgan
- D. Virchow and Pasteur
Answer: A. Schleiden and Schwann
Schleiden and Schwann proposed the cell theory, stating that all living organisms are made of cells.
Schleiden and Schwann proposed the cell theory, stating that all living organisms are made of cells.
The cell is called the basic structural unit of life because it:
- A. stores only water and salts
- B. performs all life processes
- C. is found only in animals
- D. has a rigid wall in all organisms
Answer: B. performs all life processes
A cell carries out essential life processes such as nutrition, respiration, and reproduction, making it the basic unit of life.
A cell carries out essential life processes such as nutrition, respiration, and reproduction, making it the basic unit of life.
Which of the following is NOT a membrane-bound organelle?
- A. Mitochondrion
- B. Ribosome
- C. Endoplasmic reticulum
- D. Nucleus
Answer: B. Ribosome
Ribosomes are non-membranous structures, while mitochondria, ER, and nucleus are membrane-bound.
Ribosomes are non-membranous structures, while mitochondria, ER, and nucleus are membrane-bound.
A student observes a cell with no nuclear membrane, no mitochondria, and no endoplasmic reticulum. The cell is most likely:
- A. A mature plant cell
- B. A bacterial cell
- C. An animal nerve cell
- D. A fungal cell
Answer: B. A bacterial cell
Bacterial cells are prokaryotic and lack membrane-bound organelles and a nuclear membrane.
Bacterial cells are prokaryotic and lack membrane-bound organelles and a nuclear membrane.
Which of the following statements is correct about prokaryotic cells?
- A. They possess a nuclear envelope and several linear chromosomes
- B. They lack membrane-bound organelles but have 70S ribosomes
- C. They always have mitochondria for respiration
- D. They have a well-developed Golgi apparatus
Answer: B. They lack membrane-bound organelles but have 70S ribosomes
Prokaryotic cells lack membrane-bound organelles and contain 70S ribosomes, which are smaller than eukaryotic ribosomes.
Prokaryotic cells lack membrane-bound organelles and contain 70S ribosomes, which are smaller than eukaryotic ribosomes.