IGCSE Biology Paper-1: Specimen Questions with Answers 149 - 149 of 208

Question 149

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Question

MCQ▾

The word “Prokaryote” means a cell

Choices

Choice (4)
a.With one nucleus
b.With diffused nucleus
c.Without chloroplast
d.With many nuclei

Answer

b.

Explanation

Features of Prokaryotic Cell

  • Prokaryotic cells are morphologically most primitive cells.
  • A single membrane surrounds the cell. It is without membrane bound nucleus.
  • Prokaryotic cells are devoid of membrane bound organelles like plastids, mitochondria and advanced (9 + 2) flagella.
  • They reproduce asexually by transverse binary fission or budding.
  • Prokaryotic cells are represented by bacteria, cyanobacteria (blue green algae), Mycoplasma and PPLO (pleuro-pneumonia like organisms).
  • Bacteria are unicellular organisms with prokaryotic cellular organization. They were first discovered by Anton van Leeuwenhoek (1676) in pond water and tartar of teeth. The bacteria are the simplest living organisms reproduce by fission and are mostly pathogenic on human beings.
  • Bacteria are found in all places like hot springs, beneath the icebergs, in the intestine of man, deep in the soil, in sea water etc.
Ultrastructure of Prokaryotic Cell

Ultrastructure of Prokaryotic Cell

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