Topic 1 - Introduction to cells Flashcards Preview

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Flashcards in Topic 1 - Introduction to cells Deck (15)
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1

Define cytosol...eg's of functions within it...

the concentrated aqueous gel area outside of the membrane-enclosed organelles within the cell. Range of large & small molecules and is the site of many chemical reactions fundamental to cell's existence.
Eg's: - breakdown of nutrient molecules
- manufacture of proteins via ribosomes

2

Define cytoplasm...

includes all of the cell's contents outside the nucleus including membrane-bound organelles

3

Define mitochondria...eg. of it's function

Essentially present in all eukaryotic cells, the major source of energy production ie. cellular respiration - oxidation of food molecules & oxygen -> ATP & CO2
Contain their own DNA
Thought to have derived from engulfed bacteria -> symbiotic relationship

4

What would happen to animals, fungi & plants if they lacked mitochondria?

unable to use O2 to extract max amount of energy from food molecules. O2 would become a poison for them -> they would become anaerobes

5

Define nucleus...

compartment in eukaryotes that stores genetic information in DNA. Enclosed by 2 concentric membranes (nuclear envelope)
usually the most prominent organelle in eukaryotic cell

6

When do chromosomes become visible? What instrument captures this?

just before eukaryotic cell is about to divide using light microscopy

7

Define chloroplasts...

large green organelles found only in cells of plants & algae
capture energy from sunlight

8

T or F - chloroplasts are found in plants & fungi

flase - plants & algae

9

Define lysosomes...

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10

Define chromosomes...

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11

Define golgi apparatus...

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12

Define peroxisomes...

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13

Define plasma membrane...

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14

Define endoplasmic reticulum...

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15

Define cytoskeleton...

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