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IB Biology - Fall Semester > Cell Structure > Flashcards

Cell Structure Flashcards

1
Q

Unicellular

A

Consists of a single cell

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2
Q

Protists

A

Eukaryotes consisting of single-celled organisms

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3
Q

Multicellular

A

Consists of many cells (animals, plants, most fungi)

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4
Q

Nucleus

A

The control center of the cell

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5
Q

Cytoplasm

A

Fluid that fills each cell and is contained by the plasma membrane

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6
Q

Plasma Membrane

A

Semi-permeable membrane made of lipids and proteins that contain the cell

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7
Q

Differentiation

A

Process by which cells become specialized

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8
Q

Organelle

A

A sub-cellular structure that has one or more specific jobs to perform in the cell

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9
Q

Eukaryote

A

An organism whose cells contain a nucleus within a membrane

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10
Q

Prokaryote

A

Unicellular organisms with a nucleoid (no membrane)

No membrane or nucleus

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11
Q

Metabolism

A

The chemical reactions in the body’s cells that change food into energy

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12
Q

Metabolite

A

An intermediate or end product of metabolism

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13
Q

Nuclear Envelope

A

A double-layered membrane

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14
Q

Nuclear Pore

A

Allows material in and out of the nucleus

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15
Q

Chromosome

A

A length of DNA that carries specific genes in a sequence

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16
Q

Chromatin

A

A complex structure made up of DNA tightly wrapped around proteins called histones

17
Q

Nucleolus

A

Compacted region inside the nucleus

the site of ribosome synthesis

18
Q

Mitochondria

A

Small organelles found within cells

the cells energy source

19
Q

Cristae

A

A fold in the inner membrane of a mitochondria

20
Q

Matrix

A

Fluid on the inside of the cell membrane

21
Q

Ribosome

A

The cellular machinery responsible for making proteins

protein synthesis

22
Q

Endoplasmic Reticulum

A

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

23
Q

Golgi Apparatus

A

Organelle made up of stack-like collections of flattened membrane sacs

24
Q

Lysosome

A

Tiny spherical vesicles surrounded by a single membrane

breaks down foreign materials and waste

IB Biology - Fall Semester (8 decks)

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