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Biology Exam Ch. 5
Biology Exam Ch. 5
21
Biology
Undergraduate 1
09/14/2010

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Term
Cell theory states:
Definition
  • Cells are the fundamental units of life
  • All organisms are composed of cells
  • All cells come from preexisting cells
Term
What is the simplest collection of matter that can live?
Definition
Cells
Term
A cells structure is correlated to what?
Definition
Its function
Term
Implocations of cell theory:
Definition

 

Functions of all cells are similar
Life is continuous
Origin of life was the origin of cells
Term
What are the two basic types of microsscopes?
Definition

Light microscope

 

Electron microscope

Term

Ressolution of:

 

Light microscope

 

Electron microscope

Definition

Light - 0.2 µm

 

Electron - 0.2 nm

Term
What does the image quality of a microscope depend on?
Definition

Magnification

 

Resolution

 

Contrast

Term
Magnification
Definition
ratio of an object’s image size to its real size
Term
Resolution
Definition
measure of clarity of image, or minimum distance of 2 distinguishable points
Term
Contrast
Definition
visible differences in parts of sample
Term
Cells are small because they need...?
Definition
high surface area-to-volume ratio
Term
Volume
Definition

 

§Determines the amount of chemical activity in the cell per unit time
Term
Surface area
Definition

 

§Determines the amount of substances that can pass the cell boundary per unit time
Term
What are the two types of cells?
Definition

Prokaryotic

 

Eukaryotic

Term
What are prokaryotic cells?
Definition

Archaea

 

Bacteria

 

The first cells!

Term
What are Eukaryotic cells?
Definition

Eukarya

 

 

qDNA is in a membrane-enclosed compartment called the nucleus
Term
Basic features of all cells:(4)
Definition

Plasma membrane

Semifluid substance called cytosol

Chromosomes (carry genes)

Ribosomes (make proteins)

Term
DNA is contained where?
Definition
The nucleoid
Term
Name of the cytoskeleton of rod-shaped bacteria?
Definition
Actin
Term
Some prokaryotes swim by means of?
Definition
Flagella (flagellin)
Term

 

hair-like structures projecting from the surface of prokaryotes?
Definition
Pili
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