Question 1

Why did the researchers induce cancer in mice by injecting cancer cells,instead of just doing the experiment on isolated cancer cells in culture?

Accepted Answer

A)  Cancer cells can go through angiogenesis in culture
B)  Cancer cells cannot be grown outside of the body in culture
C)  Angiogenesis occurs in a whole organism
D)  Tumor suppressors are only active in whole tumors
E)  Oncogenes are only active in whole tumors

Question 2

By ignoring a checkpoint in the cell cycle,a cancer cell may:

Accepted Answer

A)  Divide after mutations are fixed
B)  Divide before its DNA is completely replicated
C)  Condense its chromosomes before mitosis
D)  Align chromosomes on the equator of the cell during metaphase
E)  Pull chromosomes apart during anaphase

Question 3

A bacteriophage infects a bacterial cell by injecting nucleic acid into the bacterium.

Accepted Answer

A) True 
 B)False

Question 4

An example of a haploid cell is:

Accepted Answer

A)  A skin cell
B)  A sperm cell
C)  A zygote
D)  A stem cell
E)  All are correct

Question 5

Endostatin is a 184-amino acid protein that only affects endothelial cells.What is the best explanation for this observation?

Accepted Answer

A)  Endothelial cells produce endostatin
B)  Endostatin can diffuse across the membrane of endothelial cells
C)  Only endothelial cells are exposed to endostatin
D)  Endothelial cells have a receptor on their cell membrane for endostatin
E)  Endostatin enters endothelial cells by endocytosis

Question 6

DNA contains equal amounts of cytosine and:

Accepted Answer

A)  Thymine
B)  Uracil
C)  Guanine
D)  Adenine
E)  Valine

Question 7

A human heart cell contains ___ chromosomes.

Accepted Answer

A)  2
B)  23
C)  46
D)  4
E)  16

Question 8

The scientist (scientists) that used x-ray diffraction to help reveal the structure of DNA is (are) :

Accepted Answer

A)  Watson and Crick
B)  Hershey and Chase
C)  Avery and Macleod
D)  Chargaff
E)  Wilkins and Franklin

Question 9

The phase of mitosis in which the chromosomes condense and centrosomes move to opposite poles of the cell is:

Accepted Answer

A)  Prometaphase
B)  Metaphase
C)  Prophase
D)  Anaphase
E)  Telophase

Question 10

In humans,cells that do not produce gametes are collectively called:

Accepted Answer

A)  Sperm cells
B)  Egg cells
C)  Somatic cells
D)  Germ cells
E)  All are correct

Question 11

If scientists could stimulate telomerase production in cancer cells,this would most likely help stop the cancerous growth.

Accepted Answer

A) True 
 B)False

Question 12

If one strand of a DNA molecule has the base sequence of 5' CGGCATTA 3' the complementary strand of DNA will read:

Accepted Answer

A)  3' CGGCATTA 5'
B)  3' ATTACGGC 5'
C)  3' GCCGTUUT 5'
D)  3' GCCGTAAT 5'
E)  3' TAATGCCG 5'

Question 13

The scientist (scientists) that showed that DNA contained equal amounts of certain nitrogen bases is (are) :

Accepted Answer

A)  Chargaff
B)  Griffith
C)  Hershey and Chase
D)  Avery and Macleod
E)  Wilkins and Franklin

Question 14

The polymerase chain reaction:

Accepted Answer

A)  Doubles a region of DNA each cycle
B)  Is used to transfer DNA into a cell
C)  Makes a single copy of a region of DNA
D)  Is used to determine the sequence of a region of DNA
E)  All are correct

Question 15

In cloning the sheep Dolly,a nucleus was implanted into an egg that had its nucleus removed.The result of this somatic cell transfer was a ____ egg.

Accepted Answer

A)  Haploid
B)  Fertilized
C)  Embryonic
D)  Diploid
E)  Tetraploid

Question 16

If scientists could increase telomerase production in specific cells,the primary reason for this would most likely be the stopping of:

Accepted Answer

A)  Aging of cells
B)  Aerobic respiration
C)  Meiosis
D)  Cancer cell formation
E)  All are correct

Question 17

A sequence of DNA nucleotides coding for a specific protein or RNA molecule is a:

Accepted Answer

A)  Genome
B)  Chromosome
C)  Gene
D)  All of the above are correct
E)  None of the above are correct

Question 18

An abnormal mass of tissue is a tumor.

Accepted Answer

A) True 
 B)False

Question 19

The bacteria that Griffith experimented with were termed "R" and "S" bacteria because:

Accepted Answer

A)  Of the way they grew on artificial media
B)  The "R" bacteria formed rough appearing colonies
C)  The "S" bacteria formed smooth appearing colonies
D)  All are correct

Question 20

Which of the following is found in a molecule of DNA?

Accepted Answer

A)  Deoxyribose
B)  Ribose
C)  Uracil
D)  Amino acid
E)  A sulfur containing group

Exam 8: Dna Replication, mitosis and the Cell Cycle

If scientists could increase telomerase production in specific cells,the primary reason for this would most likely be the stopping of:

Correct AnswerverifiedShow Answer

A bacteriophage infects a bacterial cell by injecting nucleic acid into the bacterium.

Correct AnswerverifiedShow Answer

A sequence of DNA nucleotides coding for a specific protein or RNA molecule is a:

Correct AnswerverifiedShow Answer

By ignoring a checkpoint in the cell cycle,a cancer cell may:

Correct AnswerverifiedShow Answer

An example of a haploid cell is:

Correct AnswerverifiedShow Answer

In humans,cells that do not produce gametes are collectively called:

Correct AnswerverifiedShow Answer

The phase of mitosis in which the chromosomes condense and centrosomes move to opposite poles of the cell is:

Correct AnswerverifiedShow Answer

Why did the researchers induce cancer in mice by injecting cancer cells,instead of just doing the experiment on isolated cancer cells in culture?

Correct AnswerverifiedShow Answer

Which of the following is found in a molecule of DNA?

Correct AnswerverifiedShow Answer

An abnormal mass of tissue is a tumor.

Correct AnswerverifiedShow Answer

The polymerase chain reaction:

Correct AnswerverifiedShow Answer

Endostatin is a 184-amino acid protein that only affects endothelial cells.What is the best explanation for this observation?

Correct AnswerverifiedShow Answer

If one strand of a DNA molecule has the base sequence of 5' CGGCATTA 3' the complementary strand of DNA will read:

Correct AnswerverifiedShow Answer

DNA contains equal amounts of cytosine and:

Correct AnswerverifiedShow Answer

The scientist (scientists) that used x-ray diffraction to help reveal the structure of DNA is (are) :

Correct AnswerverifiedShow Answer

If scientists could stimulate telomerase production in cancer cells,this would most likely help stop the cancerous growth.

Correct AnswerverifiedShow Answer

In cloning the sheep Dolly,a nucleus was implanted into an egg that had its nucleus removed.The result of this somatic cell transfer was a ____ egg.

Correct AnswerverifiedShow Answer

The bacteria that Griffith experimented with were termed "R" and "S" bacteria because:

Correct AnswerverifiedShow Answer

A human heart cell contains ___ chromosomes.

Correct AnswerverifiedShow Answer

The scientist (scientists) that showed that DNA contained equal amounts of certain nitrogen bases is (are) :

Correct AnswerverifiedShow Answer

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