Question 1

Which of the following steps in the breakdown of glucose directly requires the use of oxygen?

Accepted Answer

A)  glycolysis 
B)  citric acid cycle 
C)  electron transport chain 
D)  acetyl CoA conversion 
E)  None of these require oxygen. 
A)  glycolysis 
B)  citric acid cycle 
C)  electron transport chain 
D)  acetyl CoA conversion 
E)  None of these require oxygen. C

Question 2

The plasma membrane contains how many layers of phospholipids?

Accepted Answer

A)  one 
B)  two 
C)  four 
D)  eight 
E)  sixteen 
A)  one 
B)  two 
C)  four 
D)  eight 
E)  sixteen B

Question 3

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, endothermic 
A)  hydrophobic, hydrophilic 
B)  hydrophilic, hydrophobic 
C)  autotrophic, heterotrophic 
D)  heterotrophic, autotrophic 
E)  ectothermic, endothermic B

Question 4

Which model currently describes the structure of the plasma membrane?

Accepted Answer

A)  endosymbiont model 
B)  fluid-mosaic model 
C)  plasmagel-plasmasol model 
D)  lock and key model 
E)  induced-fit model 
A)  endosymbiont model 
B)  fluid-mosaic model 
C)  plasmagel-plasmasol model 
D)  lock and key model 
E)  induced-fit model

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

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. 
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.

Question 7

If you could remove all the phosphate in the cell, what would happen to the ATP cycle?

Accepted Answer

A)  It would stop when all the ATP had been converted into ADP. 
B)  It would stop when all the ADP had been converted into ATP. 
C)  It would cycle faster because the lack of phosphate would drive the cycle. 
D)  It would cycle faster because of the buildup of ATP. 
E)  It would not affect the ATP cycle. 
A)  It would stop when all the ATP had been converted into ADP. 
B)  It would stop when all the ADP had been converted into ATP. 
C)  It would cycle faster because the lack of phosphate would drive the cycle. 
D)  It would cycle faster because of the buildup of ATP. 
E)  It would not affect the ATP cycle.

Question 8

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 9

Since all organisms carry on cellular respiration, all living cells must contain mitochondria.

Accepted Answer

A) True 
 B)False

Question 10

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

Question 11

In a metabolic pathway, substrate Z is broken down to form products 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)  five 
A)  one 
B)  two 
C)  three 
D)  four 
E)  five

Question 12

Which organelle can be likened to a post office?

Accepted Answer

A)  nucleus 
B)  nucleolus 
C)  mitochondria 
D)  endoplasmic reticulum 
E)  Golgi apparatus 
A)  nucleus 
B)  nucleolus 
C)  mitochondria 
D)  endoplasmic reticulum 
E)  Golgi apparatus

Question 13

Which type of junctions must there be between cells to form a barrier?

Accepted Answer

A)  adhesion junctions 
B)  gap junctions 
C)  tight junctions 
D)  channel junctions 
E)  free junctions 
A)  adhesion junctions 
B)  gap junctions 
C)  tight junctions 
D)  channel junctions 
E)  free junctions

Question 14

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. 
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.

Question 15

Which of the following structures are present in both eukaryotes and prokaryotes?

Accepted Answer

A)  plasma membrane 
B)  nucleus 
C)  endoplasmic reticulum 
D)  Golgi body 
E)  mitochondria 
A)  plasma membrane 
B)  nucleus 
C)  endoplasmic reticulum 
D)  Golgi body 
E)  mitochondria

Question 16

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)  crenation 
A)  diffusion 
B)  facilitated transport 
C)  active transport 
D)  osmosis 
E)  crenation

Question 17

Because bacteria are prokaryotes, they do not have DNA.

Accepted Answer

A) True 
 B)False

Question 18

A short chain of sugar attached to a protein molecule on the plasma membrane is called

Accepted Answer

A)  a protomembrane. 
B)  a protosugar. 
C)  a glycocalyx. 
D)  a glycolipid. 
E)  a glycoprotein. 
A)  a protomembrane. 
B)  a protosugar. 
C)  a glycocalyx. 
D)  a glycolipid. 
E)  a glycoprotein.

Question 19

Biologists classify cells into two broad categories- animals and plants.

Accepted Answer

A) True 
 B)False

Question 20

What do the SER and RER have in common?

Accepted Answer

A)  the presence of ribosomes 
B)  the formation of transport vesicles 
C)  the synthesis of phospholipids 
D)  the synthesis of proteins 
E)  the processing and modification of proteins 
A)  the presence of ribosomes 
B)  the formation of transport vesicles 
C)  the synthesis of phospholipids 
D)  the synthesis of proteins 
E)  the processing and modification of proteins

Exam 3: Cell Structure and Function

Which of the following steps in the breakdown of glucose directly requires the use of oxygen?

The plasma membrane contains how many layers of phospholipids?

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.

Which model currently describes the structure of the plasma membrane?

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

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

If you could remove all the phosphate in the cell, what would happen to the ATP cycle?

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

Since all organisms carry on cellular respiration, all living cells must contain mitochondria.

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

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

Which organelle can be likened to a post office?

Which type of junctions must there be between cells to form a barrier?

The reason that metabolizing cells are small in size is because

Which of the following structures are present in both eukaryotes and prokaryotes?

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

Because bacteria are prokaryotes, they do not have DNA.

A short chain of sugar attached to a protein molecule on the plasma membrane is called

Biologists classify cells into two broad categories- animals and plants.

What do the SER and RER have in common?

Human Organization

Chemistery of Life

Torganization and Regulation of Body Systems

Cardiovascular System : Heart and Blood Vessels

Cardiovascular System : Blood

The Lumphatic and Immune Systems

Biology of Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocring System

Reproductive System

Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

Dna Piology and Technology

Hummen Evolution

Ecology and the Nature of Ecosystems

Hummen Interactions With the Biosphere

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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.