Atlas of Plant and Animal Histology

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Quiz. The cell.


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1) Eukaryote cells contain a nucleus.

2) Plasma membrane separates the intracellular from the extracellular environment.

3) The cytoplasm consists of organelles, cytosol and the nucleus.

4) A typical eukaryote cells is from 10 to 50 µm in size

5) Eukaryote cells show a wide variety of forms, from elongated to star-like shapes. Rounded forms are not actually the most common morphology.

6) No cells was visualized before the invention of the light microsocpe

7) The first microsccopes were invented at the beginning fo the XVIIth century.

8) R. Hook, in his book Micrographia (1664), gives the name cell to the structures that we nowadays known as cells.

9) The cell theory postulate: " all organisms are made up of units called cells", was posed by Schwann y Schleiden.

10) The cell ultrastructure can be observed with compound light microscopes.

11) The sentence "cells arise from pre-existing cells" is a postulate of the cell theory.

12) The theories about the origin of cells do not exclude that cells may have appeared in other planets.

13) Organic molecules are only synthesized by living organisms.

14) The first cells appeared 350 million years ago.

15) The organic molecules that were used during the emerge of the first cells may have had extraterrestrial origin.

16) The laws of the Darwin evolution theory: offspring has variability and individuals are selected by the environment, may have been working before the emerging of the first cells.

17) All current cells are descendant of a common ancestral one.

18) In the origin of life, the formation of the cell membrane needed the involvement of enzymes.

19) The RNA world is the only theory that explains the evolution of the prebiotic or precellular world.

20) The genetic code is a fact that supports the idea of an universal common ancestor (LUCA) for all the current cells.

21) The autogenous theory explains how mitochondria and chloroplasts appeared in eukaryote cells.

22) The endosymbiosis theory poses that the ancestor of mitochondria was incorporated before the ancestor of chloroplasts.

23) All eukaryote cells having chloroplasts share the same ancestor, which incorporated the chloroplast ancestor. The same process has happened to mitochondria.

24) Mitochondria are similar to the current aerobic bacteria.

25) Nowadays, there are associtions between eukaryiote and prokaryote cells that support the endosimbiosis theory.

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