Fundamental Unit of Life: The Cell - 2 (Class IX)
Fundamental Unit of Life: The cell - 2
Questions
The largest structure in the nucleus of eukaryotic cells that primarily serves as the site of ribosome synthesis and assembly is
- nucleoid
- nucleolus
- vesicle
- cisterna
Cell wall is a rigid wall that lies outside the plasma membrane. Which of the following is not a function of a cell wall?
- It regulates the cell cycle.
- It has narrow pores through which fine strands of cytoplasm are able to pass.
- It permits the plant to become turgid.
- It provides mechanical strength and support to the cell.
- It is freely permeable to water and substances in solution.
Which of the following organelles is located near the nucleus and contains a stack of flattened cisternae structures?
- Chloroplast
- Golgi body
- Centrosome
- Centriole
Which of the following is not a function of nuclear membrane?
- It separates the nucleus from cytoplasm.
- It provides flexibility to the cell.
- It allows the movement of material between the nucleus and cytoplasm.
- It contains the genetic material present inside the chromosomes.
In the nucleus of each cell, each chromosome is made up of
- DNA and histone
- RNA and histone
- DNA and glycoprotein
- RNA and glycoprotein
- None of these
Which of the following is not a function of endoplasmic reticulum?
- It transports materials.
- It provides surface for some biochemical activities.
- It detoxifies poisons and drugs.
- It stores the waste material of a cell.
A student has kept a plant cell in a sugar solution for 30 minutes. What change will the student observe in the cell?
- It will burst.
- It will bulge.
- It will plasmolyse.
- It will remain the same.
A cell is kept in a hypotonic solution and after sometime it is observed that the cell volume has increased due to movement of water into it and the cell bursts. Which among the following cells could it be?
- Human cell
- Plant cell
- Fungal cell
- Bacterial cell
Which polysaccharide is the major constituent of fungal cell wall?
- Lignin
- Cellulose
- Pectin
- Chitin
- Hemicellulose
Which of the following organelles regulates the entry of certain solutes and ions in the cell?
- Plasma membrane
- Cell wall
- Nuclear membrane
- Cytoplasm
In humans, the structure of cells varies from one organ to another. Which of the following cells in the human body have elongated and branched structures?
- Muscle cells
- Red blood cells
- White blood cells
- Nerve cells
Golgi bodies are often called
- dictyosomes
- cisternae
- matrix
- cristae
Who said, “All cells arise from pre-existing cells”?
- Schwann
- Schleiden
- Purkinje
- Virchow
Lysosomes are called as the suicidal bags of a cell because they
- digest foreign materials entering the cell
- contain powerful digestive enzymes
- burst and their enzymes digest their own cells
- digest the old organelles of their own cells
The in-foldings of the inner mitochondrial membrane are called
- cristae
- oxysomes
- grana
- cisterns