2.1 Basic Components Of Living Systems Flashcards

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1
Q

Objective lens

A

Lenses used to directly observe specimen

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2
Q

Chromatic aberration/colour fringing

A

Colour distortion creating an outline of unwanted colour along edges of an object

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3
Q

Dry mount

A

Solid specimen viewed whole or sectioned. Cover slip placed on top

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4
Q

Wet mount

A

Specimen suspended in liquid. Cover slip placed at angle.
Used for living organisms

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5
Q

Squash slides

A

Wet mount first prepared, lens tissue press down cover slip.

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6
Q

Smear slides

A

Edge of slide used to smear sample, creating a thin even coating of the sample. Cover slip then placed on top

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7
Q

Gram stain technique

A

2 types of bacteria, Gram-positive & Gram-negative. Crystal violet and iodine used to stain Gram-positive. Safranin dye used as counterstain.
Gram-positive is susceptible to penicillin.

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8
Q

Fixing

A

Method used to preserve a specimen in chemicals

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9
Q

Cell wall

A

Rigid structure, Provides support to the cell.
Plants- cellulose
Fungi- chitin
Prokaryotes- murein

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10
Q

Nucleus

A

Manages cell’s genetic material. Controlls growth and division

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