parts of a cell / cell biology Flashcards

1
Q

cytoplasm

A

where chemical reactions happen

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2
Q

nucleus

A

contains genetic material
controls cells activities

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3
Q

cell membrane

A

controls movement of substances in and out of cell

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4
Q

mitochondria

A

where most energy is released in respiration

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5
Q

ribosomes

A

protein synthesis

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6
Q

chloroplast

A

chlorophyll absorbs light for photosynthesis

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7
Q

cell wall

A

made from cellulose
supports plant

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8
Q

vacuole

A

filled with cell sap to keep cell turgid

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9
Q

prokaryotic cells

A

no nucleas

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10
Q

example of prokaryotic cell

A

bacterial cell

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11
Q

eukaryotic cells

A

with nucleas

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12
Q

example of eukaryotic cell

A

animal
plant
fungi

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13
Q

how big are eukaryotic cells

A

5 μm – 100 μm

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14
Q

how big are prokaryotic cells

A

0.2 μm – 2.0 μm

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15
Q

where is dna in prokaryotic cells

A

plasmids
rings free in cytoplasm

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16
Q

how do eukaryotic cells divide

A

mitosis

17
Q

how do prokaryotic cells divide

A

binary fission

18
Q

adaptations of sperm cell

A

streamlined head
head contains enzymes so sperm can penetrate the egg
tail means sperm can swim

19
Q

adaptations of nerve cell

A

covered in a fatty sheath which insulates the nerve cell and speeds up nerve impulses

20
Q

why is it easier to view the cells using the low power objective lens first.

A

wider field of view

21
Q

Give one reason why the objective lens should not be moved towards the stage.

A

to avoid damaging the lens or the slide

22
Q

why do root hair cells not have chloroplasts

A

underground
no need to absorb sunlight

23
Q

how to avoid contamination w/ agar gel plate

A

inoculating loops to be passed through
flame

solutions and agar must be boiled

lid of the petri dish should be taped down and stored upside down