18 Questions
What is the fluid content inside the plasma membrane and excluding nucleus called?
Cytoplasm
What is the characteristic of prokaryotic bacteria chlorophyll?
Associated with membranous vesicles
What is the primary function of ribosomes?
Protein construction
Why don't viruses show characteristics of life until they enter a living organism?
They lack a membrane
What is the irregularly shaped region within the cell of a prokaryote that contains genetic material?
Nucleoid
What is the term for the region between the cell membrane and the nucleus?
Cytoplasm
What is the outermost layer of the cell that separates the cell from its environment?
Plasma membrane
What is the process by which water molecules move from a higher concentration to a lower concentration through a partially permeable membrane?
Osmosis
Who is credited with the discovery of cells?
Robert Hooke
What is the function of the nucleus in a cell?
Control center of the cell
What is the function of the rough endoplasmic reticulum?
Protein synthesis
What is the function of the cell wall in plant cells?
Support and protection
What is the function of lysosomes in a cell?
To release digestive enzymes causing cell destruction
What is the primary function of the Rough Endoplasmic Reticulum?
To synthesize proteins
What is the main function of Mitosis in cell division?
To form identical daughter cells for growth
Which organelle is responsible for storing genetic information in a cell?
Nucleus
What is the characteristic of vacuoles in plant cells?
One, large central vacuole
Where are ribosomes typically found in a cell?
In the cytoplasm and Rough Endoplasmic Reticulum
Study Notes
- In prokaryotic cells, chlorophyll is associated with membranous vesicles, not with plastids like in eukaryotic cells.
- The nucleoid is an irregularly shaped region within a prokaryote cell that contains most of the genetic material.
- Cytoplasm is the fluid content inside the plasma membrane, excluding the nucleus, and consists of cytosol and various cell organelles.
- Cell organelles are sub-cellular structures with characteristic form, structure, and function, and are almost all surrounded by a membrane.
- Viruses lack a membrane and do not show characteristics of life until they enter a living organism and use its cell machinery to multiply.
- Ribosomes are the smallest and membrane-less cell organelles, composed of RNA and proteins, and are responsible for protein synthesis.
- Centrioles are present in all animal cells but only in lower plant forms.
- Golgi apparatus, also known as dictyosomes, is present in both plant and animal cells.
- Mitochondria are present in both plant and animal cells and are responsible for generating energy for the cell.
- Vacuoles are small in animal cells but can occupy up to 90% of cell volume in plant cells.
- Lysosomes are responsible for breaking down cellular components and can cause cell destruction if they burst.
- Mitosis is the process of cell division that results in two identical daughter cells with the same number of chromosomes as the mother cell, and is essential for growth and repair of tissues in organisms.
Test your knowledge of cell structure and organelles, including prokaryotic and eukaryotic cells, chlorophyll, and membranous vesicles. This quiz covers the basics of Class 9 Biology.
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