Biology Chapter 4 Vocab

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Nucleus

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Biology

9th

26 Terms

1

Nucleus

Site where the chromatin is located

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2

Chromatin

Combination of DNA and histone proteins

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3

Nucleus envelope

Phospholipid bilayer surrounding the nucleus

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4

Nucleolus

Area of condensed chromatin. Site where ribosomes are produced.

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5

Ribosome

Site of intracellular protein synthesis.

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6

Rough Endoplasmic Reticulum

Site of extracellular protein synthesis. Composed of folded membranes covered in ribosomes.

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7

Smooth ER

Site where lipids are produced. Also helps clean (detoxify) the cell. No ribosomes here

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8

Cytosol

The liquid of the cell that the organelles are found in

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9

Golgi complex

Site of protein modification and packaging for extracellular shipment

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10

Lysosome

Site of intracellular digestion. Contains hydrolytic enzymes.

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11

Vacuole

Site of water storage in plants. Fills with water for more structural support.

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12

Mitochondria

Site of aerobic respiration and ATP production

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13

Chloroplast

Carbohydrate producing organelle. Site of photosynthesis.

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14

Peroxisome

-turns toxins into hydrogen peroxide of H2O2 Contains the enzyme catalase which turns H2O2 into water

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15

Cytockeleton

Used for cellular structure and support includes microtubules > intermediate filaments > microfilaments

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16

Cytoplasm

Everything outside of the nucleus but still within the cell.

<p>Everything outside of the nucleus but still within the cell.</p>
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17

Plasa membrane

Phospholipid bilayer surrounding the cell. Is selectively permeable.

<p>Phospholipid bilayer surrounding the cell. Is selectively permeable.</p>
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18

Light Microscope (Compound Microscope)

light passes through a specimen producing an enlarged image of the object of the specimen -the lenses bend the light so the image of the specimen is magnified

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19

Electron Microscope

focuses a beam of electrons through the specimen or onto its surface -distinguishes biological structures as small as 2 nm

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20

Transmission Electron Microscope (TEM)

used to see 2-D image of internal structures

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21

Scanning Electron Microscope (SEM)

used to see the 3-D image of a surface

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22

Coarse Focus Knob

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23

Fine Focus Knob

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24

Objective Lenses

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25

Condenser

focuses light through the specimen

<p>focuses light through the specimen</p>
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26

Iris Diaphragm

controls the amount of light passing through the specimen

<p>controls the amount of light passing through the specimen</p>
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