Bio 201 Exam 3 – Questions With Accurate Solutions

Bio 201 Exam 3 – Questions With Accurate Solutions

What are the two main categories of microbes? Correct Ans - eukaryotes
and prokaryotes

What are some unique feature of prokaryotic structures? Correct Ans - -
no membrane bound organelles
-nucleoid
-binary fission
-fimbriae (pili)

Where is DNA housed in prokaryotes? Correct Ans - nucleoid

What are some unique features of eukaryotic structures? Correct Ans - -
membrane bound organelles
-nucleus
-mitosis
-microtubules

Where is DNA housed in eukaryotes? Correct Ans - nucleus

What is a unique way that eukaryotes transport chemicals? Correct Ans -
exo/endocytosis

Describe exocytosis Correct Ans - 1. a small membrane-bound vesicle
moves through the cytosol to the cell membrane
2. vesicle fuses with the cell membrane
3. releases its contents to the exterior of the cell

Describe endocytosis Correct Ans - 1. membrane folds inward
2. fold closes in fully
3. vesicle forms and detached from cell membrane and contents are now
inside the cell

What is exocytosis utilized for in eukaryotes? Correct Ans - getting rid of
large waste products

What is endocytosis utilized for in eukaryotes? Correct Ans - inhaling
larger molecules for food

,What are flagella? Correct Ans - hairlike structures that are used for
movement on eukaryotes and prokaryotes

What do prokaryotes use to build flagella? Correct Ans - flagellin

What do eukaryotes use to build flagella? Correct Ans - microtubules

How do flagella move in prokaryotes? Correct Ans - they spin like a
propeller in a 360 degree fashion via a circular motor protein

How do flagella move in eukaryotes? Correct Ans - they wave back and
forth

What powers flagella in prokaryotes? Correct Ans - sodium ions (Na+)
and hydrogen ions (H+)

What powers flagella in eukaryotes? Correct Ans - ATP

What cellular structure is used for protein synthesis? Correct Ans -
ribosomes

Can both eukaryotes and prokaryotes have ribosomes? Correct Ans - Yes

What size ribosomes do prokaryotes have? Correct Ans - 70S

What size ribosomes do eukaryotes have? Correct Ans - 80S

The large number = Correct Ans - larger ribosomes

Where are the ribosomes located in eukaryotic microbes? Correct Ans -
located on the endoplasmic reticulum and in cytoplasm

Where are the ribosomes located in prokaryotic microbes? Correct Ans -
in the cytoplasm because prokaryotes do not have any membrane bound
organelles

What cellular structure shapes microbes? Correct Ans - cytoskeleton

, What do prokaryotes use to structure their cytoskeleton? Correct Ans - a
variety of fibers

What do eukaryotes use to structure their cytoskeleton? Correct Ans -
microtubules and microfilaments

What do bacillus use the cytoskeleton for in regards to movement?
Correct Ans - they use the cytoskeleton to expand or contract in a slinky-like
movement to move

STUDY MICROBE ARRANGEMENTS Correct Ans - *SEE POWERPOINT
FOR IMAGES*

Bacteria contain ... cell walls Correct Ans - peptidoglycan

What is the function of cell walls in bacteria? Correct Ans -
-structure/shape
-attachment
-protection from osmotic forces

What allows the cell wall to be sticky? Correct Ans - sugars

What does protection from osmotic forces mean? Correct Ans - resistant
to shriveling or swelling

What type of cell walls are unique to bacteria? Correct Ans - Gram
positive, Gram negative, and Acid Fast

What type of Gram cell wall has a single inner membrane? Correct Ans -
Gram positive

What type of Gram cell wall has a single inner and outer membrane?
Correct Ans - Gram negative

What type of Gram cell wall contains a thick peptidoglycan layer? Correct
Ans - Gram positive

What type of Gram cell wall contains a thin peptidoglycan layer? Correct
Ans - Gram negative