cell biology. Flashcards

1
Q

how do you calculate the magnification of a microscope?

A

magnification of the microscope=magnification of eyepiece X magnification of objective.

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2
Q

how do you calculate the magnification of an image?

A

magnification= size of image/real size of object
(/=divided by).

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3
Q

function of the nucleus?

A

the nucleus contains genetic material, including DNA and controls the cells activities.

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4
Q

function of the cytoplasm?

A

cytoplasm (a jelly like substance), contains dissolved nutrients, salts & structures-organelles. this is where many chemical reactions happen.

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5
Q

function of the cell membrane?

A

controls the movement of substances, in and out of the cell.

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6
Q

function of mitochondria?

A

organelles that contain the enzymes for respiration, and where most energy is released in respiration.

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7
Q

function of ribosomes?

A

tiny structures where protein synthesis occurs.

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8
Q

function of chloroplast in plant cells?

A

organelles that contain chlorophyll-which absorbs light for photosynthesis. it also contains enzymes for photosynthesis!

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9
Q

function of a cell wall in plant cells?

A

made up of cellulose fibres that strengthen the cell and support the plant.

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10
Q

function of a permanent vacuole in a plant cell?

A

filled with cell sap to help keep the cell turgid.

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11
Q

cells of bacterial are called…

A

prokaryotic cells

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12
Q

cells of animals, plants and fungi are called…

A

eukaryotic cells

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13
Q

what is a eukaryotic cell?

A

a cell that contains a nucleus.

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14
Q

what is a prokaryotic cell?

A

a simple cell that does not have a nucleus. the DNA is free in the cytoplasm.

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