NEET UG The unit of life MCQ Practice
Practice ordinary MCQs and grouped Question Sets together in one continuous session.
Practice Questions
One question at a time with instant answer view.
Correct order of layers of the cell envelope in prokaryotic cells from inner to outer is
Analyze the following statements about extension structures in prokaryotic cells: i. Flagella are thin filamentous extensions having filament, hook and basal body from the cell wall. ii. Hook is the longest portion of flagellum. iii. Pili and fimbriae have no role in motility. iv. Fimbriae are small bristle-like fibres made up of pilin. Which statements are wrong?
Cell theory was formulated by
Regarding prokaryotes:
1. They are generally smaller and multiply more rapidly than eukaryotic cells.
2. They have a cell wall surrounding the cell membrane.
3. The fluid matrix is cytoplasm and there is no well-defined nucleus.
4. Genetic material is basically naked and not enveloped by a nuclear membrane.
5. Many bacteria have small circular DNA outside genomic DNA, called plasmids.
6. Mesosomes are infoldings of the cell membrane. Which option is correct?
Select the false statement in relation to lysosomes.