2.1 Basic Components Of Living Systems

Question 1

Objective lens

Answer 1

Lenses used to directly observe specimen

Question 2

Chromatic aberration/colour fringing

Answer 2

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

Question 3

Dry mount

Answer 3

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

Question 4

Wet mount

Answer 4

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

Question 5

Squash slides

Answer 5

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

Question 6

Smear slides

Answer 6

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

Question 7

Gram stain technique

Answer 7

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.

Question 8

Fixing

Answer 8

Method used to preserve a specimen in chemicals

Question 9

Cell wall

Answer 9

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

Question 10

Nucleus

Answer 10

Manages cell’s genetic material. Controlls growth and division