M1: Cell Biology Flashcards

1
Q

Cell Membrane

A

structure that surrounds cytoplasm of the cell, and regulates the movement of materials in and out of the cell

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2
Q

Protoplasm

A

all contents of the cell

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3
Q

nucleus

A

the powerhouse of the cell; contains DNA; bound by a double membrane; contains chromosomes, genes, DNA, and RNA and directs cell division and the formation of cell structures.

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4
Q

cytoplasm

A

fluid that contains all cellular parts inside cell membrane except the nucleus

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5
Q

eukaryotic

A

cell that has a true nucleus; nuclear membrane surrounds a well-defined nucleus.

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6
Q

prokaryotic

A

cell that does not have chromosomes surrounded by nuclear membrane

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7
Q

chromosomes

A

strands of genetic material found in nucleus of eukaryotic cells

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8
Q

what are chromosomes composed of?

A

nucleic acids(DNA) and proteins

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9
Q

genes

A

short sections of a chromosome, which contain the instructions to create proteins

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10
Q

deoxyribonucleic acid (DNA)

A

a molecule that carries genetic info in cells

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11
Q

nucleolus

A

a small, spherical structure located inside the nucleus

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12
Q

the function of the nucleolus:

A

to create a genetic material, called rRNa, or ribosomal ribonucleic acid.

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13
Q

ribonucleic acid (RNA)

A

single-stranded genetic messenger that carries genetic information from the nucleus to the cytoplasm

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14
Q

Ribosomes

A

structures within the cell where protein synthesis occurs

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15
Q

lipids

A

chemical goup of fats and oils

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16
Q

selectively permeable membrane

A

a barrier that allows some molecules to pass through and blocks others

17
Q

where in the body is a selectively permeable membrane specifically important?

A

nervous, intestinal and kidney tissues, as they require materials to be moved in and out in a controlled manner

18
Q

the cell theory states the following:

A

All living things are composed of one or more cells; The cell is the smallest entity that retains the properties of life; New cells arise only from cells that already exist