CELL STRUCTURE Flashcards

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1
Q

what are organelles?

A

small membrane bound structures

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2
Q

what is a eukaryotic cell?

A

any organism consisting of one or more cells containing DNA in a membrane bound nucleus

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3
Q

what is the nucleus?

A

contains genetic material and is surrounded by a double membrane called the nuclear envelope

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4
Q

what is the cell membrane?

A

it surrounds the cell, controlling what enters and exits the cell

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5
Q

what is the cell wall?

A

a wall surrounding the cell supporting it and holding its shape

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6
Q

what is the mitochondria?

A

a organelle that is the site or aerobic respiration and produces ATP for the cell

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7
Q

what are chloroplasts?

A

they’re organelles that contain chlorophyll and are the site of photosynthesis

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8
Q

where can you find 80S ribosomes?

A

eukaryotes

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9
Q

where can you find 70S ribosomes?

A

prokaryotes
mitochondria
chloroplasts

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10
Q

what is the rough endoplasmic reticulum?

A

an organelle that produces proteins and are covered in ribosomes

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11
Q

what is the smooth endoplasmic reticulum?

A

an organelle involved in the synthesis of lipids and have no ribosomes

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12
Q

what is the golgi apparatus?

A

an organelle that modifies and packages proteins

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13
Q

what are centrioles?

A

organelles that organize the spindle fibers during cell division

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14
Q

what are cilia?

A

hair like projectors that allow the movement of substances over the cell surface

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15
Q

what is a prokaryotic cell?

A

any organism with DNA suspended in the cytoplasm. they lack the nucleus and most organelles

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16
Q

what is magnification?

A

a measure of how many times bigger an image is than the actual object

17
Q

what is resolution?

A

the ability to distinguish between two separate points

18
Q

what is a light microscope?

A

a type of microscope that uses light and lenses to magnify small specimens.

19
Q

what is an electron microscope?

A

a type of microscope that exposes specimens to electrons instead of light. these have a higher resolution and magnification than a light microscope