10/29/2024 Test Flashcards

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1
Q

Cells

A

the basic building blocks of all living things.

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2
Q

Animalcules

A

a very small organism that is invisible or nearly invisible to the naked eye.

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3
Q

Prokaryote

A

organisms whose cells lack a nucleus and other organelles

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4
Q

Eukaryote

A

an organism whose cells contain a nucleus within a membrane.

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5
Q

Cell Wall

A

the protective, semi-permeable outer layer of a plant cell.

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6
Q

Chromatin

A

a mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms

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7
Q

Chromosomes

A

A structure found inside the nucleus of a cell.

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8
Q

Nucleolus

A

An area inside the nucleus of a cell that is made up of RNA and proteins and is where ribosomes are made.

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9
Q

Nuclear Envelope

A

the two-layered membrane that surrounds the nucleus and separates it from the other cell organelles

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10
Q

Porous

A

has many small holes, so liquid or air can pass through, especially slowly

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11
Q

Cytoskeleton

A

The large network consisting of protein fibers and other molecules that gives shape and structure to cells in the body

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12
Q

Microtubules

A

A narrow, hollow tube-like structure found in the cytoplasm (the fluid inside a cell) of plant and animal cells.

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13
Q

Microfilaments

A

protein filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton

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14
Q

intermediate filaments

A

a type of cytoskeletal component found in eukaryotic cells that have a diameter of around 8-10 nm.

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15
Q

cilia

A

small, slender, hair-like structures present on the surface of all mammalian cells

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16
Q

flagella

A

microscopic hair-like structures involved in the locomotion of a cell.

17
Q

ribosomes

A

a structure found inside cells that is involved in making proteins. Ribosomes help link amino acids together to form proteins.

18
Q

endoplasmic reticulum

A

a network of membranes inside a cell through which proteins and other molecules move

19
Q

golgi apparatus

A

A stack of small flat sacs formed by membranes inside the cell’s cytoplasm

20
Q

lysosomes

A

a membrane-bound cell organelle that contains digestive enzymes

21
Q

lytic enzymes

A

able to hydrolyze the peptidoglycan responsible for the rigidity of the bacterial cell wall

22
Q

vacuoles

A

storage areas for cells and important cell parts. Inside a membrane, or thin outer layer, they store water, food, waste, and other things for the cell. Animal cells have many small vacuoles, while plant cells have large vacuoles that store water.

23
Q

vesicles

A

small cellular containers that perform a variety of functions

24
Q

chloroplasts

A

small, but critical structures inside of plant cells

25
Q

mitochondria

A

an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).