Cell: The Unit of Life

Which statement correctly distinguishes prokaryotic cells from eukaryotic cells?

1. Prokaryotic cells possess membrane-bound organelles.
2. Eukaryotic cells lack a true nucleus.
3. Prokaryotic cells lack membrane-bound organelles and a true nucleus.
4. Both possess identical cellular organization.

Which organelle is known as the "digestive system" of the cell?

1. Lysosome
2. Golgi apparatus
3. Chloroplast
4. Centriole

Which part of the nucleus contains ribosomal RNA and is involved in ribosome formation?

1. Chromatin
2. Nuclear membrane
3. Nucleolus
4. Nucleoplasm

Which of the following is present in plant cells but absent in animal cells?

1. Ribosomes
2. Mitochondria
3. Chloroplast
4. Plasma membrane

Which structure controls the movement of substances into and out of the cell?

1. Cell wall
2. Plasma membrane
3. Cytoplasm
4. Nucleolus

The rough endoplasmic reticulum appears rough because of the presence of:

1. Cell wall
2. Ribosomes
3. DNA
4. Cristae

Which organelle is responsible for photosynthesis in plant cells?

1. Mitochondrion
2. Chloroplast
3. Vacuole
4. Golgi apparatus

The fluid mosaic model of plasma membrane was proposed by:

1. Watson and Crick
2. Singer and Nicolson
3. Schleiden and Schwann
4. Robert Brown

Which cell organelle is absent in prokaryotic cells?

1. Ribosome
2. Plasma membrane
3. Nucleoid
4. Mitochondrion

Which of the following organelles contains hydrolytic enzymes?

1. Chloroplast
2. Lysosome
3. Centriole
4. Nucleolus

Ribosomes are primarily involved in:

1. Lipid synthesis
2. Protein synthesis
3. ATP production
4. Photosynthesis

Which organelle is responsible for modifying, packaging, and secreting proteins?

1. Endoplasmic reticulum
2. Golgi apparatus
3. Vacuole
4. Nucleus

Which cell organelle is known as the "powerhouse of the cell"?

1. Golgi apparatus
2. Mitochondrion
3. Ribosome
4. Lysosome

Which statement correctly represents the Cell Theory?

1. Cells arise spontaneously from non-living matter.
2. All living organisms are composed of cells, and cells arise from pre-existing cells.
3. Every cell contains chloroplasts.
4. All cells have a cell wall.

Which scientist first observed cells in a thin slice of cork?

1. Antonie van Leeuwenhoek
2. Robert Hooke
3. Robert Brown
4. Matthias Schleiden