Question 1

Which correctly describes ribosomes?

Accepted Answer

A) Ribosomes contain both DNA and protein 
B) Ribosomes are active in carbohydrate synthesis 
C) Ribosomal subunits leave the nucleolus and form ribosomes in the cytoplasm 
D) Ribosomes are found associated with the endoplasmic reticulum in prokaryotic cells 
A) Ribosomes contain both DNA and protein 
B) Ribosomes are active in carbohydrate synthesis 
C) Ribosomal subunits leave the nucleolus and form ribosomes in the cytoplasm 
D) Ribosomes are found associated with the endoplasmic reticulum in prokaryotic cells

Question 2

Sugars and amino acids move into the cell by means of

Accepted Answer

A) facilitated transport. 
B) active transport. 
C) simple diffusion. 
D) endocytosis. 
A) facilitated transport. 
B) active transport. 
C) simple diffusion. 
D) endocytosis.

Question 3

During the tug-of-war of early metaphase,condensed sister chromatids move to the middle of the cell and line up along a __________ ___________.

Accepted Answer

The answer of During the tug-of-war of early metaphase,condensed sister...

Question 4

The specific form of endocytosis wherein small areas of the surface membrane are invaginated to form tiny vesicles containing fluids.

Accepted Answer

A) Pinocytosis 
B) Cotransport 
C) Endocytosis 
D) Exocytosis 
A) Pinocytosis 
B) Cotransport 
C) Endocytosis 
D) Exocytosis

Question 5

The current theory of the structure of the plasma membrane is best described by which of the following models?

Accepted Answer

A) The fluid-mosaic model 
B) The unit membrane model 
C) The electrochemical model 
D) The nuclear envelope model 
A) The fluid-mosaic model 
B) The unit membrane model 
C) The electrochemical model 
D) The nuclear envelope model

Question 6

Cell products such as undigested residues are removed from the cell through

Accepted Answer

A) facilitated transport. 
B) cotransport. 
C) endocytosis. 
D) exocytosis. 
A) facilitated transport. 
B) cotransport. 
C) endocytosis. 
D) exocytosis.

Question 7

In a phospholipid bilayer,the

Accepted Answer

A) cholesterol is on the outside and plays a critical role in maintaining the fluidity of the membrane. 
B) glycoproteins are on the inside providing a supporting site for adhesive functions. 
C) glycoproteins are anchored in the plasma membrane to assist in their transport functions. 
D) water-soluble ends are oriented toward the exterior and interior of the cell,whereas the fat-soluble fatty acids are oriented toward the inside of the membrane. 
A) cholesterol is on the outside and plays a critical role in maintaining the fluidity of the membrane. 
B) glycoproteins are on the inside providing a supporting site for adhesive functions. 
C) glycoproteins are anchored in the plasma membrane to assist in their transport functions. 
D) water-soluble ends are oriented toward the exterior and interior of the cell,whereas the fat-soluble fatty acids are oriented toward the inside of the membrane.

Question 8

An important technique that allows biologists to trace the fate of chemicals in metabolic pathways is the use

Accepted Answer

A) of the immunofluorescence microscope. 
B) of radioactive isotopes. 
C) of time lapse photography. 
D) of centrifugation. 
A) of the immunofluorescence microscope. 
B) of radioactive isotopes. 
C) of time lapse photography. 
D) of centrifugation.

Question 9

If the nucleus divides many times without cytokinesis occurring,the result is

Accepted Answer

A) cell death. 
B) interphase. 
C) a multinucleate cell. 
D) an incomplete spindle. 
A) cell death. 
B) interphase. 
C) a multinucleate cell. 
D) an incomplete spindle.

Question 10

Cancer occurs in somatic (or body)cells.Explain how the process of mitosis might be railroaded into producing cancerous cells.

Accepted Answer

Cancer occurs in somatic (or body) cells

Question 11

A paramecium is placed in a hypotonic solution.Which will occur?

Accepted Answer

A) Salts will move into the paramecium from the surrounding solution 
B) Water will move into the paramecium from the surrounding solution 
C) Salts will move out of the paramecium into the surrounding solution 
D) Water will move out of the paramecium into the surrounding solution 
A) Salts will move into the paramecium from the surrounding solution 
B) Water will move into the paramecium from the surrounding solution 
C) Salts will move out of the paramecium into the surrounding solution 
D) Water will move out of the paramecium into the surrounding solution

Question 12

If there is life on other planets,would it necessarily resemble life that has evolved on Earth? Why or why not?

Accepted Answer

The possibility of life on other planets

Question 13

A multinucleate mass formed by the fusion of many cells rather than by nuclear proliferation is called a ____________.

Accepted Answer

The answer of A multinucleate mass formed by the fusion...

Question 14

The model of the plasma membrane that provides for the fluidity of materials embedded in its surface is the ________

Accepted Answer

The answer of The model of the plasma membrane that...

Question 15

Identify the various cell structures that have an endomembrane system;identify the function of each.What is unusual about eukaryotic organelles that have an endomembrane system?

Accepted Answer

The various cell structures that have an

Question 16

Describe the structure of cilia and flagella in eukaryotic cells,and contrast that with the structure of flagella in prokaryotic cells.

Accepted Answer

Cilia and flagella in eukaryotic cells a

Question 17

Which occurs during metaphase?

Accepted Answer

A) Centrioles move to opposite poles 
B) Chromosomes line up along the equator of the dividing cell 
C) Chromosomes move to opposite poles 
D) The nuclear envelope disappears 
A) Centrioles move to opposite poles 
B) Chromosomes line up along the equator of the dividing cell 
C) Chromosomes move to opposite poles 
D) The nuclear envelope disappears

Question 18

Which occurs during anaphase?

Accepted Answer

A) Centrioles move to opposite poles 
B) Chromosomes line up along the equator of the dividing cell 
C) Chromatids move to opposite poles 
D) The nuclear envelope disappears 
A) Centrioles move to opposite poles 
B) Chromosomes line up along the equator of the dividing cell 
C) Chromatids move to opposite poles 
D) The nuclear envelope disappears

Question 19

Which is NOT a characteristic of mitochondria?

Accepted Answer

A) A mitochondrion has two membranes 
B) Mitochondria are the site of cellular respiration 
C) Mitochondria contain their own genome 
D) Mitochondria are replicated by nuclear chromosomes 
A) A mitochondrion has two membranes 
B) Mitochondria are the site of cellular respiration 
C) Mitochondria contain their own genome 
D) Mitochondria are replicated by nuclear chromosomes

Question 20

Compare and contrast the various stages of mitosis and meiosis.Hypothesize which process arose first (explain your reasoning).

Accepted Answer

Mitosis and meiosis are both processes o

Exam 3: Cells As Units of Life

Which correctly describes ribosomes?

Sugars and amino acids move into the cell by means of

During the tug-of-war of early metaphase,condensed sister chromatids move to the middle of the cell and line up along a __________ ___________.

The specific form of endocytosis wherein small areas of the surface membrane are invaginated to form tiny vesicles containing fluids.

The current theory of the structure of the plasma membrane is best described by which of the following models?

Cell products such as undigested residues are removed from the cell through

In a phospholipid bilayer,the

An important technique that allows biologists to trace the fate of chemicals in metabolic pathways is the use

If the nucleus divides many times without cytokinesis occurring,the result is

Cancer occurs in somatic (or body)cells.Explain how the process of mitosis might be railroaded into producing cancerous cells.

A paramecium is placed in a hypotonic solution.Which will occur?

If there is life on other planets,would it necessarily resemble life that has evolved on Earth? Why or why not?

A multinucleate mass formed by the fusion of many cells rather than by nuclear proliferation is called a ____________.

The model of the plasma membrane that provides for the fluidity of materials embedded in its surface is the ________

Identify the various cell structures that have an endomembrane system;identify the function of each.What is unusual about eukaryotic organelles that have an endomembrane system?

Describe the structure of cilia and flagella in eukaryotic cells,and contrast that with the structure of flagella in prokaryotic cells.

Which occurs during metaphase?

Which occurs during anaphase?

Which is NOT a characteristic of mitochondria?

Compare and contrast the various stages of mitosis and meiosis.Hypothesize which process arose first (explain your reasoning).

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

Chaetognaths, echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

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During the tug-of-war of early metaphase,condensed sister chromatids move to the middle of the cell and line up along a _.