Question 1

This diagram best shows a cell during _________ of mitosis.

Accepted Answer

A) anaphase 
B) metaphase 
C) prophase 
D) telophase 
A) anaphase 
B) metaphase 
C) prophase 
D) telophase

Question 2

In _____________ molecules show a net movement from greater to lesser concentration due to the random motion of the molecules.

Accepted Answer

A) simple diffusion 
B) exocytosis 
C) facilitated diffusion 
D) active transport 
E) endocytosis 
A) simple diffusion 
B) exocytosis 
C) facilitated diffusion 
D) active transport 
E) endocytosis

Question 3

The process called diffusion

Accepted Answer

A) is the tendency for solute molecules to move from an area of high concentration to an area of low concentration. 
B) is the product of random movement of all atoms,molecules,and ions in a solution. 
C) always produces net movement of materials against the concentration gradient for that material. 
D) is both the tendency for solute molecules to move from an area of high concentration to an area of low concentration and is the product of random movement of all atoms,molecules,and ions in a solution are correct. 
E) is both the tendency for solute molecules to move from an area of high concentration to an area of low concentration and always produces net movement of materials against the concentration gradient for that material. 
A) is the tendency for solute molecules to move from an area of high concentration to an area of low concentration. 
B) is the product of random movement of all atoms,molecules,and ions in a solution. 
C) always produces net movement of materials against the concentration gradient for that material. 
D) is both the tendency for solute molecules to move from an area of high concentration to an area of low concentration and is the product of random movement of all atoms,molecules,and ions in a solution are correct. 
E) is both the tendency for solute molecules to move from an area of high concentration to an area of low concentration and always produces net movement of materials against the concentration gradient for that material.

Question 4

Differentiation occurs when

Accepted Answer

A) DNA is lost during mitosis. 
B) cytoplasm is lost during mitosis. 
C) RNA takes over function of the cell from DNA. 
D) some portions of DNA become (or remain)active,while other portions become (or remain)inactive. 
E) DNA is lost during mitosis and RNA takes over function of the cell from DNA. 
A) DNA is lost during mitosis. 
B) cytoplasm is lost during mitosis. 
C) RNA takes over function of the cell from DNA. 
D) some portions of DNA become (or remain)active,while other portions become (or remain)inactive. 
E) DNA is lost during mitosis and RNA takes over function of the cell from DNA.

Question 5

A selective poison that blocked the function of the mitochondria was used on a group of cells.Which of the following processes would most likely be interrupted by the presence of this poison?

Accepted Answer

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

Question 6

The sperm cell is able to move (is motile)because of its

Accepted Answer

A) numerous cilia. 
B) microvilli. 
C) flagellum. 
D) numerous lysosomes. 
E) active transport mechanism. 
A) numerous cilia. 
B) microvilli. 
C) flagellum. 
D) numerous lysosomes. 
E) active transport mechanism.

Question 7

The usual means for getting very large molecules,like whole proteins,across the cell membrane is by

Accepted Answer

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

Question 8

A dialysis membrane is selectively permeable,and substances smaller than proteins are able to pass through.The dialysis machine allows blood to flow past one side of the dialysis membrane and the dialysis fluid flows on the other side of the membrane.If you wanted to use a dialysis machine to remove only urea (a small molecule)from blood,what could you use for the dialysis fluid?

Accepted Answer

A) a solution that is isotonic and contains only protein 
B) a solution that is isotonic and contains the same concentration of substances as blood,except for having no urea in it 
C) distilled water 
D) whole blood 
E) hypertonic salt water 
A) a solution that is isotonic and contains only protein 
B) a solution that is isotonic and contains the same concentration of substances as blood,except for having no urea in it 
C) distilled water 
D) whole blood 
E) hypertonic salt water

Question 9

____________ are a component of the cytoskeleton that help to provide support,assist in cell division and help to form cilia.

Accepted Answer

A) Microtubules 
B) Microfilaments 
C) Intermediate filaments 
D) Centrosomes 
E) All of these choices are acceptable. 
A) Microtubules 
B) Microfilaments 
C) Intermediate filaments 
D) Centrosomes 
E) All of these choices are acceptable.

Question 10

Translation

Accepted Answer

A) requires three types of DNA. 
B) requires the pairing of codons on tRNA with anticodons on mRNA. 
C) involves copying RNA from DNA molecules. 
D) involves formation of peptide bonds between adjacent amino acids. 
E) All of these are true of translation. 
A) requires three types of DNA. 
B) requires the pairing of codons on tRNA with anticodons on mRNA. 
C) involves copying RNA from DNA molecules. 
D) involves formation of peptide bonds between adjacent amino acids. 
E) All of these are true of translation.

Question 11

Substances transported across the plasma membrane by carrier molecules

Accepted Answer

A) are said to be transported by carrier-mediated processes. 
B) include glucose and amino acid molecules. 
C) are each transported by a specific type of carrier molecule. 
D) include larger molecules that are not lipid-soluble. 
E) All of these are correct. 
A) are said to be transported by carrier-mediated processes. 
B) include glucose and amino acid molecules. 
C) are each transported by a specific type of carrier molecule. 
D) include larger molecules that are not lipid-soluble. 
E) All of these are correct.

Question 12

In humans

Accepted Answer

A) the diploid number of chromosomes is 46. 
B) each body cell has 23 chromosomes. 
C) each body cell has 2 pairs of sex chromosomes. 
D) a male has two X chromosomes in each body cell. 
E) each body cell has 46 autosomes. 
A) the diploid number of chromosomes is 46. 
B) each body cell has 23 chromosomes. 
C) each body cell has 2 pairs of sex chromosomes. 
D) a male has two X chromosomes in each body cell. 
E) each body cell has 46 autosomes.

Question 13

Which of the following are thought to cause aging?

Accepted Answer

A) Death genes are turned on later in life causing cells to deteriorate. 
B) Free radicals damage the DNA of a cell past the point where successful accurate replication can occur. 
C) Mitochondrial DNA damage results in the loss of proteins and therefore energy production ability. 
D) After a certain number of cell divisions,a cell line is pre-programmed to stop dividing and dies. 
E) All of these are theories on why we age. 
A) Death genes are turned on later in life causing cells to deteriorate. 
B) Free radicals damage the DNA of a cell past the point where successful accurate replication can occur. 
C) Mitochondrial DNA damage results in the loss of proteins and therefore energy production ability. 
D) After a certain number of cell divisions,a cell line is pre-programmed to stop dividing and dies. 
E) All of these are theories on why we age.

Question 14

The nucleotide that is synthesized in the nucleus from a DNA template is

Accepted Answer

A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are correct. 
A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are correct.

Question 15

Which of the following statements concerning facilitated diffusion is correct?

Accepted Answer

A) Facilitated diffusion involves the use of ATP. 
B) Facilitated diffusion involves carrier molecules in the plasma membrane. 
C) Facilitated diffusion is used to exchange one substance for another. 
D) Facilitated diffusion is one specific type of endocytosis. 
E) Facilitated diffusion occurs during filtration. 
A) Facilitated diffusion involves the use of ATP. 
B) Facilitated diffusion involves carrier molecules in the plasma membrane. 
C) Facilitated diffusion is used to exchange one substance for another. 
D) Facilitated diffusion is one specific type of endocytosis. 
E) Facilitated diffusion occurs during filtration.

Question 16

A red blood cell placed in distilled water would be expected to

Accepted Answer

A) swell and lyse. 
B) shrink and lyse. 
C) swell and crenate. 
D) shrink and crenate. 
A) swell and lyse. 
B) shrink and lyse. 
C) swell and crenate. 
D) shrink and crenate.

Question 17

______________ is a specific type of endocytosis that is responsible for bringing liquids and small particles into cells inside of small vesicles.

Accepted Answer

A) Phagocytosis 
B) Pinocytosis 
C) Receptor mediated endocytosis 
D) Exocytosis 
A) Phagocytosis 
B) Pinocytosis 
C) Receptor mediated endocytosis 
D) Exocytosis

Question 18

Which of these cells would most likely have the largest number of mitochondria?

Accepted Answer

A) bone cells 
B) muscle cells 
C) fat cells 
D) blood cells 
E) skin cells 
A) bone cells 
B) muscle cells 
C) fat cells 
D) blood cells 
E) skin cells

Question 19

The nucleotide that is required for protein synthesis is

Accepted Answer

A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are correct. 
A) tRNA. 
B) mRNA. 
C) rRNA. 
D) All of these are correct.

Question 20

Which of the following phases is NOT correctly matched with its description?

Accepted Answer

A) metaphase - chromosomes align along the center of the cell 
B) interphase - period between active cell division 
C) telophase - chromosomes begin to unravel and resemble the genetic material during interphase 
D) prophase - chromosomes move toward the poles of the cell 
E) anaphase - centromeres and chromatids separate 
A) metaphase - chromosomes align along the center of the cell 
B) interphase - period between active cell division 
C) telophase - chromosomes begin to unravel and resemble the genetic material during interphase 
D) prophase - chromosomes move toward the poles of the cell 
E) anaphase - centromeres and chromatids separate

This diagram best shows a cell during _________ of mitosis.

In _____________ molecules show a net movement from greater to lesser concentration due to the random motion of the molecules.

The process called diffusion

Differentiation occurs when

A selective poison that blocked the function of the mitochondria was used on a group of cells.Which of the following processes would most likely be interrupted by the presence of this poison?

The sperm cell is able to move (is motile)because of its

The usual means for getting very large molecules,like whole proteins,across the cell membrane is by

____________ are a component of the cytoskeleton that help to provide support,assist in cell division and help to form cilia.

Translation

Substances transported across the plasma membrane by carrier molecules

In humans

Which of the following are thought to cause aging?

The nucleotide that is synthesized in the nucleus from a DNA template is

Which of the following statements concerning facilitated diffusion is correct?

A red blood cell placed in distilled water would be expected to

______________ is a specific type of endocytosis that is responsible for bringing liquids and small particles into cells inside of small vesicles.

Which of these cells would most likely have the largest number of mitochondria?

The nucleotide that is required for protein synthesis is

Which of the following phases is NOT correctly matched with its description?

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

Filters

Exam 3: Cell Structures and Their Functions

This diagram best shows a cell during _________ of mitosis.

In _____________ molecules show a net movement from greater to lesser concentration due to the random motion of the molecules.

The process called diffusion

Differentiation occurs when

A selective poison that blocked the function of the mitochondria was used on a group of cells.Which of the following processes would most likely be interrupted by the presence of this poison?

The sperm cell is able to move (is motile)because of its

The usual means for getting very large molecules,like whole proteins,across the cell membrane is by

____________ are a component of the cytoskeleton that help to provide support,assist in cell division and help to form cilia.

Translation

Substances transported across the plasma membrane by carrier molecules

In humans

Which of the following are thought to cause aging?

The nucleotide that is synthesized in the nucleus from a DNA template is

Which of the following statements concerning facilitated diffusion is correct?

A red blood cell placed in distilled water would be expected to

______________ is a specific type of endocytosis that is responsible for bringing liquids and small particles into cells inside of small vesicles.

Which of these cells would most likely have the largest number of mitochondria?

The nucleotide that is required for protein synthesis is

Which of the following phases is NOT correctly matched with its description?

The Human Organism

The Chemical Basis of Life

Tissues

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, heredity, and Aging

Filters