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Biology N5 revision > Cells > Flashcards

Cells Flashcards

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1
Q

What is a cell?

A

Cells are the basic units of life.

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2
Q

Describe what Organelles are?

A

Organelles are tiny structures (such as chloroplasts) that are present in a cell’s cytoplasm surrounded by a membrane

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3
Q

What organelles makes up a plant cell?

A

Cell wall, cell membrane, Chloroplast, vacuole, cytoplasm, mitochondrion, nucleus and ribosome

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4
Q

What organelles make up an animal cell?

A

cell membrane, cytoplasm, mitochondrion, nucleus and ribosome

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5
Q

What organelles make up a unicellular fungus cell?

A

vacuole, nucleus, cell wall, cell membrane, mitochondrion and ribosome

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6
Q

What organelles make up a bacteria cell?

A

Cell wall, cell membrane, plasmid, circular chromosome and ribosome

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7
Q

What is the function of a cell wall?

A

Supports and strengthens

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8
Q

What is the function of a cell membrane?

A

controls movement of substances

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9
Q

What is the function of cytoplasm?

A

Site of chemical reactions

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10
Q

What is the function of mitochondria?

A

Site of aerobic respiration

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11
Q

What is the function of the vacuole?

A

Contains dissolved sugar and salts

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12
Q

What is the function of Ribosomes?

A

Site of protein synthesis

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13
Q

What is the function of plasmids?

A

Contains genes that helps cell to function

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14
Q

What is the function of the nucleus?

A

Controls activities of a cell

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15
Q

Describe a unicellular organism?

A

An organism consisting of one cell (Amoeba)

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16
Q

Describe multi-cellular organism?

A

an organism consisting of many cells (human, plant, animal cells)

17
Q

Why is staining used when investigating cells?

A

To see the cell structure more clearly

18
Q

What staining is used to show cell structure in plant cells?

A

Iodine

19
Q

What staining is used to show cell structure in animal cells?

A

Methylene blue

20
Q

What are the 6 parts of the microscope?

A

(1) Eyepiece (2) Coarse focusing dial (3) Fine focusing dial (4) Objective lens (5) stage (6) mirror

21
Q

How do you find the total magnification?

A

Magnification of the eye-piece lens x objective lens

(x10 multiplied by x75 = x750)
(x10 multiplied by x150 = x1500)
(x10 multiplied by x300 = x3000)

This is true in reverse using division to get the “x10”

22
Q

What unit is used to measure cells?

A

micro-meters

23
Q

How many micro-metres are in a millimetre?

A

1000 micrometres are in a millimetre

24
Q

What is a cell membrane made up of?

A

Protein and Phospholipid molecules

25
Q

How many layers of phospholipid molecules are there in a cell membrane?

A

a double layer

26
Q

What happens when molecules of protein are exposed to acid or high temperatures?

A

They become denatured (destroyed and non-functional)

Biology N5 revision (1 decks)

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