Cell The Unit of Life - Online Test
Q1. The membrane complex formed in folding of plasma membrane in prokaryotic cells is called
Answer : Option D
Explaination / Solution:
A special membranous structure is the mesosome which is formed by the extensions of plasma membrane into the cell.
Q2. The smallest free living organism are
Answer : Option B
Explaination / Solution:
PPLO (Pleuro Pneumonia Like Organisms). They are generally smaller and multiply more rapidly than the eukaryotic cells.
Q3. In certain bacteria, the glycocalyx is forms into loose sheath layer is called as
Answer : Option A
Explaination / Solution:
Glycocalyx differs in composition and thickness among different bacteria. It could be a loose sheath called the slime layer in some, while in others it may be thick and tough called the capsule. The cell wall determines the shape of the cell and provides a strong structural support.
Q4. The bacterial flagellum consists of
Answer : Option D
Explaination / Solution:
A bacterial flagellum has 3 basic parts: a filament, a hook, and a basal body.
1) The filament is the rigid, helical structure that extends from the cell surface.
2) The hook is a flexible coupling between the filament and the basal body.
3) The basal body consists of a rod and a series of rings that anchor the flagellum to the cell wall and the cytoplasmic membrane.
Q5. The rod shaped bacteria is called as
Answer : Option B
Explaination / Solution:
The shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma shaped) and spirillum (spiral).
Q6. In prokaryotes, the reserved food material is stored in
Answer : Option B
Explaination / Solution:
Reserve material in prokaryotic cells are stored in the cytoplasm in the form of inclusion bodies.
Q7. Tubulin occurs in
Answer : Option B
Explaination / Solution:
Tubulin is a kind of protein which is present in the cilia and flagella of cells having it. It provide flexibility of the cilia and flagella.
Q8. Arrangement of ciliary microtubules is
Answer : Option A
Explaination / Solution:
Cilia present in prokaryotic organisms consist of microtubules. These microtubules are arranged in 9+2 order in which 2 forms the center and 9 are arranged at periphery.
Q9. Which does not occur in cell membrane?
Answer : Option D
Explaination / Solution:
Cell membrane consists of phospholipids and protiens. Some cells also contain praline and cholesterol but glycolipid is not present in cell membrane.
Q10. Lipid molecules of plasma membrane occur
Answer : Option A
Explaination / Solution:
The lipid molecules occur in chains. In plasma membrane two molecular chains of lipids remain parallel to each other.
