Question 1

Which of the following statements about DNA is FALSE?

Accepted Answer

A)   Complementary nitrogenous bases can base pair.
B)   In DNA, the nitrogenous base adenine pairs with uracil.
C)   DNA is typically double stranded.
D)   Genetic information is stored in the sequence of bases.
E)   The complementary sequence of bases in the two strands of DNA explains how DNA copies itself before each cell division.F) A) and B)
G) A) and E)

Question 2

In DNA,base pairing involves a

Accepted Answer

A)   histone core binding with DNA.
B)   ribosome pairing with a purine.
C)   purine binding to a phosphate group.
D)   purine binding to another purine.
E)   purine binding to a pyrimidine.F) A) and D)
G) B) and D)

Question 3

People with Xeroderma Pigmentosum are extremely resistant to DNA damage caused by UV light.

Accepted Answer

A) True 
 B)False

Question 4

One of Rosalind Franklin's X-ray diffraction photos was crucial for Watson and Crick to develop their model of DNA.

Accepted Answer

A) True 
 B)False

Question 5

A single DNA nucleotide consists of all of the following components EXCEPT

Accepted Answer

A)   a phosphate group.
B)   deoxyribose.
C)   a nitrogenous base.
D)   uracil.
E)   none of these.F) All of the above
G) B) and E) D

Question 6

In a DNA molecule,hydrogen bonds form between which of the following pairs of bases?

Accepted Answer

A)   thymine and adenine
B)   guanine and thymine
C)   cytosine and thymine
D)   adenine and uracil
E)   adenine and cytosineF) A) and C)
G) A) and D)

Question 7

Which base is ONLY found in RNA?

Accepted Answer

A)   cytosine
B)   adenine
C)   thymine
D)   uracil
E)   guanineF) All of the above
G) B) and E) D

Question 8

Which of the following components is NOT present in RNA?

Accepted Answer

A)   thymine
B)   phosphate group
C)   uracil
D)   ribose
E)   cytosineF) A) and D)
G) A) and C)

Question 9

Which one of the following nitrogenous bases is not found in DNA?

Accepted Answer

A)   uracil
B)   adenine
C)   guanine
D)   cytosine
E)   thymineF) B) and D)
G) D) and E)

Question 10

DNA is found in both the nucleus and cytoplasm.

Accepted Answer

A) True 
 B)False

Question 11

What are the subunits of DNA and RNA called?

Accepted Answer

A)   fatty acids
B)   nucleotides
C)   amino acids
D)   nucleic acids
E)   riboseF) A) and B)
G) A) and E)

Question 12

All of the following describe functions of DNA polymerase EXCEPT

Accepted Answer

A)   produces DNA molecules that contain one old strand and one new strand.
B)   adds complementary base pairs to the growing strand.
C)   links together nucleotides.
D)   detects errors in the replication process and corrects the mistake.
E)   produces RNA molecules.F) A) and D)
G) A) and E)

Question 13

The ____ forms when DNA is wound around a histone core.

Accepted Answer

A)   nucleosome
B)   centromere
C)   chromatid
D)   polymerase
E)   double helixF) A) and E)
G) D) and E)

Question 14

How can UV light exposure cause DNA mutations?

Accepted Answer

A)   The UV light disrupts normal base pairing of the DNA at the site of the damage.
B)   The UV light disrupts the DNA repair systems in the cell.
C)   The UV light changes the DNA polymerase so it makes more mistakes.
D)   The UV light causes breaks in the DNA strands.
E)   The UV light separates the two strands of the double helix.F) C) and E)
G) B) and D)

Question 15

In DNA replication,

Accepted Answer

A)   the double helix is not unwound.
B)   the enzyme RNA polymerase links nucleotides together.
C)   the sugar of one nucleotide is linked to the sugar of the next.
D)   new DNA molecules contain one old and one new strand.
E)   only one of the two original strands will serve as a template.F) B) and D)
G) A) and E) D

Question 16

The DNA model proposed by Watson and Crick offered a molecular explanation for mutation.

Accepted Answer

A) True 
 B)False

Question 17

Nucleotides are made of four components.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is a pyrimidine?

Accepted Answer

A)   uracil
B)   adenine
C)   guanine
D)   ribose
E)   deoxyriboseF) A) and B)
G) A) and E)

Question 19

The difference between deoxyribose and ribose is that deoxyribose contains an extra oxygen atom.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is a purine?

Accepted Answer

A)   cysteine
B)   uracil
C)   thymine
D)   cytosine
E)   adenineF) A) and D)
G) A) and C)

Exam 18: Biology Basics 2-DNA and RNA

Which of the following statements about DNA is FALSE?

Correct AnswerverifiedShow Answer

In DNA,base pairing involves a

Correct AnswerverifiedShow Answer

People with Xeroderma Pigmentosum are extremely resistant to DNA damage caused by UV light.

Correct AnswerverifiedShow Answer

One of Rosalind Franklin's X-ray diffraction photos was crucial for Watson and Crick to develop their model of DNA.

Correct AnswerverifiedShow Answer

A single DNA nucleotide consists of all of the following components EXCEPT

Correct AnswerverifiedD

In a DNA molecule,hydrogen bonds form between which of the following pairs of bases?

Correct AnswerverifiedShow Answer

Which base is ONLY found in RNA?

Correct AnswerverifiedD

Which of the following components is NOT present in RNA?

Correct AnswerverifiedShow Answer

Which one of the following nitrogenous bases is not found in DNA?

Correct AnswerverifiedShow Answer

DNA is found in both the nucleus and cytoplasm.

Correct AnswerverifiedShow Answer

What are the subunits of DNA and RNA called?

Correct AnswerverifiedShow Answer

All of the following describe functions of DNA polymerase EXCEPT

Correct AnswerverifiedShow Answer

The ____ forms when DNA is wound around a histone core.

Correct AnswerverifiedShow Answer

How can UV light exposure cause DNA mutations?

Correct AnswerverifiedShow Answer

In DNA replication,

Correct AnswerverifiedD

The DNA model proposed by Watson and Crick offered a molecular explanation for mutation.

Correct AnswerverifiedShow Answer

Nucleotides are made of four components.

Correct AnswerverifiedShow Answer

Which of the following is a pyrimidine?

Correct AnswerverifiedShow Answer

The difference between deoxyribose and ribose is that deoxyribose contains an extra oxygen atom.

Correct AnswerverifiedShow Answer

Which of the following is a purine?

Correct AnswerverifiedShow Answer

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D

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D

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D

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