Question 1

With regard to tight junctions,

Accepted Answer

A) one face of the cell, the apical surface, is in contact with other cells. 
B) they allow free movement of ions and molecules between cells. 
C) they are responsible for holding cardiac muscle together. 
D) they are composed of special proteins called connexins. 
E) they block the movement of basolateral integral membrane proteins to the apical surface. 
A) one face of the cell, the apical surface, is in contact with other cells. 
B) they allow free movement of ions and molecules between cells. 
C) they are responsible for holding cardiac muscle together. 
D) they are composed of special proteins called connexins. 
E) they block the movement of basolateral integral membrane proteins to the apical surface.

Question 2

Communication between animal cells is facilitated by

Accepted Answer

A) tight junctions. 
B) gap junctions. 
C) adhesive junctions. 
D) plasmodesmata. 
E) both choices B and C 
A) tight junctions. 
B) gap junctions. 
C) adhesive junctions. 
D) plasmodesmata. 
E) both choices B and C

Question 3

________ are infectious proteins that are responsible for several animal diseases,including scrapie and mad cow disease.

Accepted Answer

The answer of ________ are infectious proteins that are responsible...

Question 4

If the surface area of a cell increases by a factor of 100,the volume of that cell will

Accepted Answer

A) remain the same. 
B) increase by a factor of 100. 
C) increase by a factor of 1000. 
D) increase by a factor of 10. 
E) decrease by a factor of 100. 
A) remain the same. 
B) increase by a factor of 100. 
C) increase by a factor of 1000. 
D) increase by a factor of 10. 
E) decrease by a factor of 100.

Question 5

Tubulin is to microtubules as ________ is to microfilaments.

Accepted Answer

The answer of Tubulin is to microtubules as ________ is...

Question 6

The chromoplast is an organelle associated with

Accepted Answer

A) oxidation of sugars. 
B) synthesis of secretory proteins. 
C) plant pigment storage. 
D) ribosome production in primitive plants. 
E) storage of chromium. 
A) oxidation of sugars. 
B) synthesis of secretory proteins. 
C) plant pigment storage. 
D) ribosome production in primitive plants. 
E) storage of chromium.

Question 7

Photosynthesis is to the chloroplast as ________ is to the mitochondrion.

Accepted Answer

The answer of Photosynthesis is to the chloroplast as ________...

Question 8

Which of the following is a eukaryotic characteristic?

Accepted Answer

A) cell fission 
B) membrane-bounded nucleus 
C) little processing of RNA 
D) 70S ribosomes 
E) none of the above 
A) cell fission 
B) membrane-bounded nucleus 
C) little processing of RNA 
D) 70S ribosomes 
E) none of the above

Question 9

Within human lungs,the apical surface of the epithelium produces a growth factor called heregulin.The receptors for heregulin are located on the basolateral surface of the same cells.When the lung epithelial lining is intact,the tight junctions create a barrier that separates the heregulin from its receptors.However,when the epithelial lining is compromised,the heregulin is able to reach its receptors,where it stimulates mitosis and thereby leads to wound healing.Based upon this information,explain what happens with smoking cigarettes,which is known to increase the permeability of airway epithelium.

Accepted Answer

The heregulin will continually penetrate

Question 10

Intermediate filaments are

Accepted Answer

A) different in different cell types. 
B) smaller than actin filaments. 
C) composed of tubulin. 
D) composed of globular proteins only. 
E) none of the above 
A) different in different cell types. 
B) smaller than actin filaments. 
C) composed of tubulin. 
D) composed of globular proteins only. 
E) none of the above

Question 11

The region within the prokaryotic cell where the DNA is located is known as the ________.

Accepted Answer

The answer of The region within the prokaryotic cell where...

Question 12

As a cell increases in size,the surface area ________ and the volume ________.

Accepted Answer

The answer of As a cell increases in size,the surface...

Question 13

Which of the following is not generally associated with a chloroplast?

Accepted Answer

A) thylakoids 
B) grana 
C) stroma 
D) matrix 
E) both choices A and B 
A) thylakoids 
B) grana 
C) stroma 
D) matrix 
E) both choices A and B

Question 14

The hallmark feature of peroxisomal diseases is the presence of

Accepted Answer

A) hydrolases. 
B) very long chain fatty acids. 
C) long chain gangliosides. 
D) an abundance of myelin. 
E) amyloid plaques. 
A) hydrolases. 
B) very long chain fatty acids. 
C) long chain gangliosides. 
D) an abundance of myelin. 
E) amyloid plaques.

Question 15

Which of the following fundamental properties of life do viruses not possess?

Accepted Answer

A) metabolism 
B) irritability 
C) ability to reproduce 
D) both choices A and B 
E) both choices B and C 
A) metabolism 
B) irritability 
C) ability to reproduce 
D) both choices A and B 
E) both choices B and C

Question 16

The methanobacteria,halobacteria,and sulfobacteria are included in which domain?

Accepted Answer

A) eubacteria 
B) protista 
C) blue-green algae 
D) archaea 
E) all of the above 
A) eubacteria 
B) protista 
C) blue-green algae 
D) archaea 
E) all of the above

Question 17

Which of the following is least likely to be part of a cell membrane?

Accepted Answer

A) proteoglycans 
B) phospholipids 
C) glycoproteins 
D) transport proteins 
E) enzymes 
A) proteoglycans 
B) phospholipids 
C) glycoproteins 
D) transport proteins 
E) enzymes

Question 18

Mitochondrial DNA is/are

Accepted Answer

A) similar to nuclear DNA sequences. 
B) used to trace dispersal of modern humans. 
C) information storage for enzymes associated with photorespiration. 
D) associated with paternal inheritance patterns. 
E) all of the above 
A) similar to nuclear DNA sequences. 
B) used to trace dispersal of modern humans. 
C) information storage for enzymes associated with photorespiration. 
D) associated with paternal inheritance patterns. 
E) all of the above

Question 19

Membrane proteins may function in

Accepted Answer

A) receiving extracellular signals. 
B) amphipathic modification. 
C) temperature control. 
D) protein manufacture. 
E) information storage. 
A) receiving extracellular signals. 
B) amphipathic modification. 
C) temperature control. 
D) protein manufacture. 
E) information storage.

Question 20

The term "junk DNA" is no longer used because these regions of DNA have been found to be associated with all of the following except

Accepted Answer

A) miRNAs. 
B) speciation. 
C) binding sites for regulatory regions. 
D) All of the above have been associated with "junk DNA." 
E) None of the above have been associated with "junk DNA." 
A) miRNAs. 
B) speciation. 
C) binding sites for regulatory regions. 
D) All of the above have been associated with "junk DNA." 
E) None of the above have been associated with "junk DNA."

Exam 4: Cells and Organelles

With regard to tight junctions,

Communication between animal cells is facilitated by

________ are infectious proteins that are responsible for several animal diseases,including scrapie and mad cow disease.

If the surface area of a cell increases by a factor of 100,the volume of that cell will

Tubulin is to microtubules as ________ is to microfilaments.

The chromoplast is an organelle associated with

Photosynthesis is to the chloroplast as ________ is to the mitochondrion.

Which of the following is a eukaryotic characteristic?

Intermediate filaments are

The region within the prokaryotic cell where the DNA is located is known as the ________.

As a cell increases in size,the surface area ________ and the volume ________.

Which of the following is not generally associated with a chloroplast?

The hallmark feature of peroxisomal diseases is the presence of

Which of the following fundamental properties of life do viruses not possess?

The methanobacteria,halobacteria,and sulfobacteria are included in which domain?

Which of the following is least likely to be part of a cell membrane?

Mitochondrial DNA is/are

Membrane proteins may function in

The term "junk DNA" is no longer used because these regions of DNA have been found to be associated with all of the following except

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters

As a cell increases in size,the surface area and the volume .