Biology - Eukaryotic Cell Structures and their Descriptions

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Description and Tags

20 Terms

1

nucleus

large structure surrounded by double membrane; contains nucleolus and chromosomes

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2

nucleolus

granular body within nucleus; consists of RNA and protein

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3

chromosomes

composed of chromatin, a complex of DNA and protein; condense during cell division, becoming visible as rodlike structures

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4

plasma membrane

membrane boundary of cell

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5

endoplasmic reticulum

network of internal membranes extending through cytoplasm

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6

smooth endoplasmic reticulum

lacks ribosomes on outer surface

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7

rough endoplasmic reticulum

ribosomes stud outer surface

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8

ribosomes

granules composed of RNA and protein

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9

golgi complex

stacks of flattened membrane sacs

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10

lysosomes

membranous sacs (in animals)

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11

vacuoles

membranous sacs (mostly in plants, fungi, algae)

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12

peroxisomes

membranous sacs containing a variety of enzymes

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13

mitochondria

sacs consisting of two membranes; inner membrane is folded to form cristae and encloses matrix

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14

chloroplast

double-membrane structure enclosing internal thylakoid membrane; chloroplasts contain chlorophyll in thylakoid membrane

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15

microtubules

hollow tubes made of subunits of tubulin protein

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16

microfilaments

solid, rodlike structures consisting of actin protein

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17

intermediate filaments

tough fibers made of protein

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18

centrioles

pair of hollow cylinders located near nucleus; each centriole consists of nine microtubule triplets

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19

cilia

relatively short projections extending from surface of cell

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20

flagella

long projections made of two central and nine pairs of peripheral microtubules

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