Question 1

Why are cells called "the fundamental unit of life"?

Accepted Answer

A)  All known organisms have one or more cells.
B)  Earliest life on Earth is hypothesized to have been single-celled.
C)  Some cells are separate living entities that can survive individually.
D)  Cells are the smallest unit of life that can function independently.
E)  All answers are correct.F) C) and D)
G) C) and E)

Question 2

All eukaryotic cells produce many proteins,and this requires,for some of the proteins,the interaction of endoplasmic reticulum and

Accepted Answer

A)  cell wall.
B)  chloroplast.
C)  ribosome.
D)  mitochondrion.
E)  cilium.F) A) and B)
G) B) and D) C

Question 3

A central vacuole

Accepted Answer

A)  produces protein.
B)  degrades molecules and organelles and maintains water pressure.
C)  produces mRNA.
D)  stores genetic information.
E)  produces energy from food.F) A) and D)
G) B) and E)

Question 4

If you had found an organelle that clearly showed that were looking at a plant cell,rather than an animal cell,you might be looking at

Accepted Answer

A)  a centriole.
B)  a ribosome.
C)  a cell membrane.
D)  a lysosome.
E)  a chloroplast.F) B) and E)
G) A) and D)

Question 5

The cell wall of bacteria

Accepted Answer

A)  helps prevent the cell from bursting.
B)  protects the cell.
C)  gives the bacterium a distinctive shape.
D)  contains peptidoglycan.
E)  All answers are correct.F) A) and E)
G) A) and B)

Question 6

The three domains in the Woese system of classification are

Accepted Answer

A)  Bacteria,Animalia,and Plantae.
B)  Fungi,Protista,and Animalia.
C)  Archaea,Eukarya,and Protista.
D)  Monera,Bacteria,and Eukarya.
E)  Archaea,Bacteria,and Eukarya.F) B) and D)
G) C) and E)

Question 7

You are working on a forensics team and collect cells from a crime scene.The cells have a cell wall made of cellulose.This sample most likely came from

Accepted Answer

A)  an animal.
B)  a bacterium.
C)  a plant.
D)  a fungus.
E)  an archaean.F) A) and C)
G) All of the above

Question 8

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the volume increase?

Accepted Answer

A)  2-fold
B)  8-fold
C)  It would stay the same.
D)  9-fold
E)  4-foldF) B) and C)
G) All of the above

Question 9

In most mammals,the DNA found in mitochondria is inherited from

Accepted Answer

A)  the father only.
B)  the mother and father.
C)  either parent.
D)  the mother only.
E)  Mitochondria are not found in mammals.F) A) and E)
G) D) and E)

Question 10

Chloroplasts are known for all of the following except being

Accepted Answer

A)  glucose factories.
B)  responsible for respiration.
C)  found in plants.
D)  organelles that carry out photosynthesis.
E)  found in some protists.F) D) and E)
G) C) and D)

Question 11

The phospholipid bilayer of membranes allows lipids and small,nonpolar molecules to pass across membranes,but prohibits the passage of ions and polar molecules.This occurs because the phospholipid tails are

Accepted Answer

A)  always saturated.
B)  hydrophilic and hydrophobic.
C)  always unsaturated.
D)  hydrophilic and selectively permeable.
E)  hydrophobic and selectively permeablE.F) C) and D)
G) B) and E)

Question 12

The function of the nucleolus is

Accepted Answer

A)  protein synthesis.
B)  photosynthesis.
C)  transport of material into and out of the nucleus.
D)  assembly of components of ribosomes.
E)  assembly of DNA.F) C) and D)
G) B) and E)

Question 13

Scientists have discovered that a few prokaryotic cells do have internal membranes.

Accepted Answer

A) True 
 B)False

Question 14

In order,the organelles involved in the production of milk are

Accepted Answer

A)  nucleus,nuclear pore,rough ER,smooth ER,transport vesicle,Golgi body,and vesicle for secretion.
B)  nucleus,smooth ER,rough ER,nuclear pore,transport vesicle,Golgi body,and vesicle for secretion.
C)  nucleus,transport vesicle,rough ER,smooth ER,Golgi body,and vesicle for secretion.
D)  nucleus,nuclear pore,Golgi body,rough ER,transport vesicle,smooth ER,and vesicle for secretion.
E)  None of the answers are correct.F) B) and D)
G) B) and C)

Question 15

You discover a new life form,and study it under an electron microscope.You find that it has no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life form is in domain

Accepted Answer

A)  BacteriA.
B)  Archaea.
C)  Eukarya.
D)  Protista.
E)  Animalia.F) A) and D)
G) A) and E)

Question 16

What do a pine tree,an octopus,and a bacterium have in common at the microscopic level?

Accepted Answer

A)  nothing in common
B)  nuclei
C)  blood supply
D)  cancerous tissues
E)  cellular compositionF) D) and E)
G) None of the above E

Question 17

Eukaryotic cells are 10-100 times the size of prokaryotic cells.How do eukaryotic cells resolve the surface area to volume limitations that favor smaller cells?

Accepted Answer

A)  They have pumps that move gasses and nutrients through the cell.
B)  Movement of materials is prevented in cells without a cell wall.
C)  Organelles keep reactions compartmentalized and concentrated.
D)  Gasses are taken up by active transport.
E)  None of the biochemical reactions in prokaryotes occur in eukaryotes.F) C) and D)
G) D) and E) C

Question 18

Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?

Accepted Answer

A)  aid in digestion
B)  act as decomposers
C)  serve as producers
D)  produce pharmaceuticals
E)  cause mitochondrial diseasesF) All of the above
G) C) and D)

Question 19

Endosymbiosis is a theory based on the presence of structures like chloroplasts and ribosomes,which resemble cells from prokaryotic domains,in eukaryotic cells.

Accepted Answer

A) True 
 B)False

Question 20

If you were asked to place labels on models of cell components,on the flagella model,you would not place a label saying that it was

Accepted Answer

A)  found on prokaryotic cells.
B)  found on human sperm.
C)  used for movement.
D)  found on eukaryotic cells.
E)  a component of the cytoskeleton.F) A) and C)
G) A) and E)

Exam 3: Cells

Why are cells called "the fundamental unit of life"?

Correct AnswerverifiedShow Answer

All eukaryotic cells produce many proteins,and this requires,for some of the proteins,the interaction of endoplasmic reticulum and

Correct AnswerverifiedC

A central vacuole

Correct AnswerverifiedShow Answer

If you had found an organelle that clearly showed that were looking at a plant cell,rather than an animal cell,you might be looking at

Correct AnswerverifiedShow Answer

The cell wall of bacteria

Correct AnswerverifiedShow Answer

The three domains in the Woese system of classification are

Correct AnswerverifiedShow Answer

You are working on a forensics team and collect cells from a crime scene.The cells have a cell wall made of cellulose.This sample most likely came from

Correct AnswerverifiedShow Answer

Cells typically keep their surface to volume ratio low.If a cell was a cube and you doubled the height,width,and length of the cell,how much would the volume increase?

Correct AnswerverifiedShow Answer

In most mammals,the DNA found in mitochondria is inherited from

Correct AnswerverifiedShow Answer

Chloroplasts are known for all of the following except being

Correct AnswerverifiedShow Answer

The phospholipid bilayer of membranes allows lipids and small,nonpolar molecules to pass across membranes,but prohibits the passage of ions and polar molecules.This occurs because the phospholipid tails are

Correct AnswerverifiedShow Answer

The function of the nucleolus is

Correct AnswerverifiedShow Answer

Scientists have discovered that a few prokaryotic cells do have internal membranes.

Correct AnswerverifiedShow Answer

In order,the organelles involved in the production of milk are

Correct AnswerverifiedShow Answer

You discover a new life form,and study it under an electron microscope.You find that it has no organelles,a peptidoglycan cell wall,and fatty acids in its plasma membrane.You conclude that the new life form is in domain

Correct AnswerverifiedShow Answer

What do a pine tree,an octopus,and a bacterium have in common at the microscopic level?

Correct AnswerverifiedE

Eukaryotic cells are 10-100 times the size of prokaryotic cells.How do eukaryotic cells resolve the surface area to volume limitations that favor smaller cells?

Correct AnswerverifiedC

Which of the following is NOT a beneficial ecological role of members of the domain Bacteria?

Correct AnswerverifiedShow Answer

Endosymbiosis is a theory based on the presence of structures like chloroplasts and ribosomes,which resemble cells from prokaryotic domains,in eukaryotic cells.

Correct AnswerverifiedShow Answer

If you were asked to place labels on models of cell components,on the flagella model,you would not place a label saying that it was

Correct AnswerverifiedShow Answer

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C

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