Question 1

In the fluid-mosaic model of the plasma membrane,the phospholipid molecules are oriented so that the _____________ heads are facing the outside environment and the ________________ tails are facing the interior of the membrane.

Accepted Answer

A)   hydrophobic, hydrophilic
B)   hydrophilic, hydrophobic
C)   autotrophic, heterotrophic
D)   heterotrophic, autotrophic
E)   ectothermic, endothermicF) A) and B)
G) D) and E)

Question 2

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?

Accepted Answer

A)   diffusion
B)   facilitated transport
C)   active transport
D)   osmosis
E)   crenationF) None of the above
G) A) and B)

Question 3

What is the obvious dark-stained structure within the nucleus that contains ribosomal RNA called?

Accepted Answer

A)   nucleus
B)   nucleolus
C)   nuclear envelope
D)   nucleoplasm
E)   endoplasmic reticulumF) D) and E)
G) All of the above

Question 4

Viruses are not made up of cells.According to cell theory,this means what?

Accepted Answer

A)   Viruses can cause disease.
B)   Cells come only from pre-existing cells.
C)   Cells can be infected by viruses.
D)   Viruses are not living.
E)   Cells and viruses are the same thing.F) C) and E)
G) B) and D)

Question 5

In the sodium potassium pump,sodium and potassium are both pumped out of the cell via active transport.

Accepted Answer

A) True 
 B)False

Question 6

The nucleus of a cell in your thigh muscle contains the same genes as the nucleus of a cell in your brain.

Accepted Answer

A) True 
 B)False

Question 7

Often when a person is admitted to the hospital,an intravenous solution of normal saline is begun.Since this does not harm the patient,what is the tonicity of normal saline compared to your blood?

Accepted Answer

A)   hypertonic
B)   isotonic
C)   hypotonicD) B) and C)
E) A) and C)

Question 8

Why is glycolysis believed to have evolved early in the history of life?

Accepted Answer

A)   It breaks down sugar.
B)   It produces energy.
C)   It is present in most every type of cell.
D)   It does not require oxygen.
E)   It splits a 6-carbon molecule into two 3-carbon molecules.F) A) and E)
G) B) and D)

Question 9

Paleontologists have discovered ancient prokaryotic fossils dated at over 3.5 billion years old.These fossils resemble prokaryotes that are capable of living in extreme conditions such as high temperature and salinity.What domain do these prokaryotes belong to?

Accepted Answer

A)   Protists
B)   Protoctista
C)   Archaea
D)   Archetista
E)   EukaryaF) A) and E)
G) B) and D)

Question 10

All of the following are possible origins of cell organelles in eukaryotes EXCEPT

Accepted Answer

A)   invagination of the plasma membrane to form endoplasmic reticulum.
B)   incorporation of engulfed heterotrophic bacteria to form mitochondria.
C)   incorporation of engulfed autotrophic cyanobacteria to form chloroplasts.
D)   a symbiotic relationship between a host cell and a prokaryote that was taken up but not destroyed.
E)   groups of prokaryotic cells begin to live in a small group sharing products of metabolism.F) A) and D)
G) A) and C)

Question 11

The light microscope has a resolving power of

Accepted Answer

A)   0.1 mm.
B)   0.01 mm.
C)   0.0001 mm.
D)   0.000001 mm.
E)   0.00000001 mm.F) B) and E)
G) A) and E)

Question 12

What are the folds in mitochondrial membranes called?

Accepted Answer

A)   matrix
B)   cristae
C)   rugae
D)   lumen
E)   villiF) B) and D)
G) D) and E)

Question 13

Whose work proved conclusively that spontaneous generation of life from nonlife was not possible?

Accepted Answer

A)   Louis Pasteur
B)   Charles Darwin
C)   John Ray
D)   Walther Flemming
E)   Georges CuvierF) B) and C)
G) A) and E)

Question 14

Angela would like to look at living algae from pond water.What type of microscope should she use?

Accepted Answer

A)   compound light microscope
B)   transmission electron microscope
C)   scanning electron microscopeD) None of the above
E) All of the above

Question 15

What cellular organelle is especially abundant in phagocytic white blood cells?

Accepted Answer

A)   nuclei
B)   nucleoli
C)   Golgi apparati
D)   lysosomes
E)   ribosomesF) All of the above
G) C) and D)

Question 16

The reason that metabolizing cells are small in size is because

Accepted Answer

A)   cells influence nearby cells to divide.
B)   the surface area of a cell must be able to accomplish nutrient/waste exchange.
C)   cells need to dissipate heat effectively.
D)   mitosis occurs before cells reach a certain size.
E)   cells need to communicate with adjacent cells.F) A) and E)
G) D) and E)

Question 17

In a metabolic pathway,substrate Z is broken down to form product Y and X.Y is further broken down into products V and W.How many enzymes are required for this metabolic pathway?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) A) and C)
G) B) and E)

Question 18

The sum of all of the chemical reactions that occur in a cell collectively are called

Accepted Answer

A)   respiration.
B)   anabolism.
C)   photosynthesis.
D)   metabolism.
E)   reaction summary.F) A) and D)
G) B) and D)

Question 19

Centrosomes are associated with

Accepted Answer

A)   ribosomes.
B)   mitochondria.
C)   chromosomes.
D)   microtubules.
E)   lysosomes.F) A) and B)
G) A) and C)

Question 20

How large is a nuclear pore in the nuclear envelope?

Accepted Answer

A)   larger than a ribosome
B)   larger than the Golgi apparatus
C)   larger than the endoplasmic reticulum
D)   smaller than a ribosome
E)   smaller than a proteinF) A) and D)
G) C) and D)

Exam 3: Cell Structure and Function

In a metabolic pathway,substrate Z is broken down to form product Y and X.Y is further broken down into products V and W.How many enzymes are required for this metabolic pathway?

Correct AnswerverifiedShow Answer

Why is glycolysis believed to have evolved early in the history of life?

Correct AnswerverifiedShow Answer

Paleontologists have discovered ancient prokaryotic fossils dated at over 3.5 billion years old.These fossils resemble prokaryotes that are capable of living in extreme conditions such as high temperature and salinity.What domain do these prokaryotes belong to?

Correct AnswerverifiedShow Answer

Often when a person is admitted to the hospital,an intravenous solution of normal saline is begun.Since this does not harm the patient,what is the tonicity of normal saline compared to your blood?

Correct AnswerverifiedShow Answer

What is the obvious dark-stained structure within the nucleus that contains ribosomal RNA called?

Correct AnswerverifiedShow Answer

All of the following are possible origins of cell organelles in eukaryotes EXCEPT

Correct AnswerverifiedShow Answer

Angela would like to look at living algae from pond water.What type of microscope should she use?

Correct AnswerverifiedShow Answer

Viruses are not made up of cells.According to cell theory,this means what?

Correct AnswerverifiedShow Answer

Centrosomes are associated with

Correct AnswerverifiedShow Answer

In the sodium potassium pump,sodium and potassium are both pumped out of the cell via active transport.

Correct AnswerverifiedShow Answer

The assisted transport of a molecule across the cell membrane without an expenditure of energy is known as what?

Correct AnswerverifiedShow Answer

What cellular organelle is especially abundant in phagocytic white blood cells?

Correct AnswerverifiedShow Answer

The nucleus of a cell in your thigh muscle contains the same genes as the nucleus of a cell in your brain.

Correct AnswerverifiedShow Answer

How large is a nuclear pore in the nuclear envelope?

Correct AnswerverifiedShow Answer

In the fluid-mosaic model of the plasma membrane,the phospholipid molecules are oriented so that the _____________ heads are facing the outside environment and the ________________ tails are facing the interior of the membrane.

Correct AnswerverifiedShow Answer

The light microscope has a resolving power of

Correct AnswerverifiedShow Answer

What are the folds in mitochondrial membranes called?

Correct AnswerverifiedShow Answer

Whose work proved conclusively that spontaneous generation of life from nonlife was not possible?

Correct AnswerverifiedShow Answer

The reason that metabolizing cells are small in size is because

Correct AnswerverifiedShow Answer

The sum of all of the chemical reactions that occur in a cell collectively are called

Correct AnswerverifiedShow Answer

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In the fluid-mosaic model of the plasma membrane,the phospholipid molecules are oriented so that the _ heads are facing the outside environment and the ____ tails are facing the interior of the membrane.

Correct Answer
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