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Choose true or false. Each right answer scores 1, and each wrong answer scores -1. Not answered questions score 0.
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False |
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1) Eukaryote cells contain a nucleus.
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2) Plasma membrane separates the intracellular from the extracellular environment.
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3) The cytoplasm consists of organelles, cytosol and the nucleus.
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4) A typical eukaryote cells is from 10 to 50 µm in size
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5) Eukaryote cells show a wide variety of forms, from elongated to star-like shapes. Rounded forms are not actually the most common morphology.
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6) No cells was visualized before the invention of the light microsocpe
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7) The first microsccopes were invented at the beginning fo the XVIIth century.
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8) R. Hook, in his book Micrographia (1664), gives the name cell to the structures that we nowadays known as cells.
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9) The cell theory postulate: " all organisms are made up of units called cells", was posed by Schwann y Schleiden.
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10) The cell ultrastructure can be observed with compound light microscopes.
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11) The sentence "cells arise from pre-existing cells" is a postulate of the cell theory.
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12) The theories about the origin of cells do not exclude that cells may have appeared in other planets.
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13) Organic molecules are only synthesized by living organisms. |
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14) The first cells appeared 350 million years ago. |
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15) The organic molecules that were used during the emerge of the first cells may have had extraterrestrial origin. |
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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. |
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17) All current cells are descendant of a common ancestral one. |
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18) In the origin of life, the formation of the cell membrane needed the involvement of enzymes. |
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19) The RNA world is the only theory that explains the evolution of the prebiotic or precellular world. |
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20) The genetic code is a fact that supports the idea of an universal common ancestor (LUCA) for all the current cells. |
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21) The autogenous theory explains how mitochondria and chloroplasts appeared in eukaryote cells. |
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22) The endosymbiosis theory poses that the ancestor of mitochondria was incorporated before the ancestor of chloroplasts. |
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23) All eukaryote cells having chloroplasts share the same ancestor, which incorporated the chloroplast ancestor. The same process has happened to mitochondria. |
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24) Mitochondria are similar to the current aerobic bacteria. |
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25) Nowadays, there are associtions between eukaryiote and prokaryote cells that support the endosimbiosis theory. |
