Question 1

All triplets required to code for synthesis of a protein are a ________.

Accepted Answer

A)   pre-mRNA
B)   proenzyme
C)   gene
D)   ribosomal RNA (rRN
A)  
E)   codonF) C) and E)
G) A) and B)

Question 2

Which organelle's function would be most affected if a cell was not able to carry out exocytosis?

Accepted Answer

A)   Secretory vesicle
B)   Lysosome
C)   Proteosome
D)   PeroxisomeE) A) and B)
F) A) and C)

Question 3

Which type of membrane proteins can catalyze chemical reactions on the inner or outer surfaces of the plasma membrane?

Accepted Answer

A)   Marker molecules
B)   Channel protein
C)   Receptor proteins
D)   Enzymes
E)   Carrier proteinsF) All of the above
G) A) and B)

Question 4

Which type of attachment proteins attach cells to extracellular molecules?

Accepted Answer

A)   Ligands
B)   Integrins
C)   Adherins
D)   CadherinsE) B) and C)
F) A) and D)

Question 5

Plasma membrane phospholipids

Accepted Answer

A)   have nonpolar fatty acid tails.
B)   form a bilayer.
C)   have polar phosphate heads.
D)   create a selectively permeable barrier.
E)   All of the choices are correct.F) C) and D)
G) B) and E)

Question 6

The leading strand of DNA is formed as

Accepted Answer

A)   short segments called Okazaki fragments.
B)   a continuous strand, adding to the 3´ end.
C)   a continuous strand, adding to the 5´ end.
D)   a template.
E)   soon as the lagging strand is formed.F) A) and E)
G) B) and D)

Question 7

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

Accepted Answer

A)   Receptor-mediated endocytosis
B)   Pinocytosis
C)   Facilitated diffusion
D)   Active exocytosisE) None of the above
F) A) and B)

Question 8

Which of the following could be used to study general features of cells?

Accepted Answer

A)   A magnifying glass
B)   Scanning electron microscope
C)   Transmission electron microscope
D)   Binoculars
E)   Light microscopeF) C) and D)
G) A) and E)

Question 9

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is/are directly involved in carrying out communication between cells?

Accepted Answer

A)   Lipid bilayer of the plasma membrane
B)   Receptor proteins of the plasma membrane
C)   Chemical signal molecules released by cells
D)   Mitochondria
E)   Both "Receptor proteins of the plasma membrane" and "Chemical signal molecules released by cells" are correct.F) D) and E)
G) C) and D)

Question 10

Which of the following events occurs during anaphase?

Accepted Answer

A)   Chromatin strands condense to form chromosomes.
B)   Chromosomes migrate to opposite poles of the cell.
C)   Spindle fibers are formed.
D)   The nuclear envelope degenerates.
E)   Cytokinesis completes.F) C) and D)
G) A) and B)

Question 11

Which term describes a small generic membrane-bound structure that transports substances to the plasma membrane for release by exocytosis?

Accepted Answer

A)   Secretory vesicle
B)   Centrosome
C)   Chromatid
D)   Proteosome granule
E)   OrganelleF) B) and D)
G) None of the above

Question 12

Which organelle produces most of the cell's energy?

Accepted Answer

A)   Nucleus
B)   Ribosome
C)   Lysosome
D)   Mitochondrion
E)   CentrioleF) A) and C)
G) A) and B)

Question 13

Which of the following is an organelle of locomotion?

Accepted Answer

A)   Endoplasmic reticulum
B)   Golgi apparatus
C)   Nucleolus
D)   Peroxisomes
E)   FlagellumF) A) and B)
G) C) and D)

Question 14

Transcription

Accepted Answer

A)   requires three types of RNA.
B)   synthesizes RNA from DNA.
C)   occurs at the ribosomes.
D)   copies information from mRNA to tRNA.
E)   synthesizes DNA from RNA.F) All of the above
G) B) and D)

Question 15

If a 0.9% NaCl (saline)  solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Accepted Answer

A)   hypertonic to the cell.
B)   isotonic to the cell.
C)   hypotonic to the cell.
D)   catatonic to the cell.
E)   All of the choices are correct.F) B) and E)
G) A) and E)

Question 16

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

Accepted Answer

A)   Directs cellular activities, contains DNA
B)   Contains digestive enzymes
C)   Outer boundary of cell, controls entry and exit of substances
D)   Major site of ATP synthesis when oxygen is available
E)   Site of protein synthesisF) None of the above
G) C) and D)

Question 17

In the process of diffusion, net movement of substances is always from a region

Accepted Answer

A)   outside the cell to a region inside the cell.
B)   inside the cell to a region outside the cell.
C)   of lower concentration to a region of higher concentration.
D)   of higher concentration to a region of lower concentration.
E)   None of the choices are correct.F) A) and C)
G) A) and B)

Question 18

Plasma membrane phospholipids

Accepted Answer

A)   have polar (charged)  tails.
B)   are arranged in a single layer.
C)   have tails that face the exterior of the membrane.
D)   are 95% cholesterol.
E)   have a hydrophilic head and hydrophobic tails.F) B) and C)
G) A) and B)

Question 19

As cell division begins, DNA in the nucleus condenses to form ________.

Accepted Answer

A)   RNA
B)   cytosol
C)   genes
D)   chromosomes
E)   chromatinF) A) and D)
G) A) and E)

Question 20

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "D"?

Accepted Answer

A)   Directs cellular activities, contains DNA
B)   Contains digestive enzymes
C)   Outer boundary of cell, controls entry and exit of substances
D)   Major site of ATP synthesis when oxygen is available
E)   Site of protein synthesisF) D) and E)
G) A) and C)

Exam 3: Cell Biology

Which type of attachment proteins attach cells to extracellular molecules?

Correct AnswerverifiedShow Answer

Transcription

Correct AnswerverifiedShow Answer

If a 0.9% NaCl (saline) solution is isotonic to a cell, then a solution of 3.5% NaCl would be

Correct AnswerverifiedShow Answer

Communication between cells is essential to coordinate the activity of the trillions of cells that make up the human body. Which of the following is/are directly involved in carrying out communication between cells?

Correct AnswerverifiedShow Answer

Plasma membrane phospholipids

Correct AnswerverifiedShow Answer

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "B"?

Correct AnswerverifiedShow Answer

Which organelle produces most of the cell's energy?

Correct AnswerverifiedShow Answer

In one form of endocytosis a molecule binds to a specific protein on the cell surface and triggers vesicle formation and endocytosis. What type of transport is this?

Correct AnswerverifiedShow Answer

Which of the following is an organelle of locomotion?

Correct AnswerverifiedShow Answer

All triplets required to code for synthesis of a protein are a ________.

Correct AnswerverifiedShow Answer

Which of the following could be used to study general features of cells?

Correct AnswerverifiedShow Answer

Plasma membrane phospholipids

Correct AnswerverifiedShow Answer

Which of the following events occurs during anaphase?

Correct AnswerverifiedShow Answer

The leading strand of DNA is formed as

Correct AnswerverifiedShow Answer

As cell division begins, DNA in the nucleus condenses to form ________.

Correct AnswerverifiedShow Answer

Which type of membrane proteins can catalyze chemical reactions on the inner or outer surfaces of the plasma membrane?

Correct AnswerverifiedShow Answer

-The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "D"?

Correct AnswerverifiedShow Answer

In the process of diffusion, net movement of substances is always from a region

Correct AnswerverifiedShow Answer

Which term describes a small generic membrane-bound structure that transports substances to the plasma membrane for release by exocytosis?

Correct AnswerverifiedShow Answer

Which organelle's function would be most affected if a cell was not able to carry out exocytosis?

Correct AnswerverifiedShow Answer

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