Question 1

Which pair of bases is linked together by two hydrogen bonds?

Accepted Answer

A)  guanine and adenine 
B)  adenine and cytosine 
C)  guanine and thymine 
D)  none of these 
A)  guanine and adenine 
B)  adenine and cytosine 
C)  guanine and thymine 
D)  none of these

Question 2

Genes are located in which type of molecules?

Accepted Answer

A)  DNA 
B)  histones 
C)  proteins 
D)  RNA 
A)  DNA 
B)  histones 
C)  proteins 
D)  RNA

Question 3

Which of the following correctly describes satellites and telomeres?

Accepted Answer

A)  Both can occur at the ends or in the middle of chromosomes. 
B)  Both can occur only at the ends of chromosomes. 
C)  Satellites occur only at the ends of chromosomes, but telomeres can be found at the ends or in the middle of chromosomes. 
D)  Telomeres occur only at the ends of chromosomes, but satellites can be found at the ends or in the middle of chromosomes. 
A)  Both can occur at the ends or in the middle of chromosomes. 
B)  Both can occur only at the ends of chromosomes. 
C)  Satellites occur only at the ends of chromosomes, but telomeres can be found at the ends or in the middle of chromosomes. 
D)  Telomeres occur only at the ends of chromosomes, but satellites can be found at the ends or in the middle of chromosomes.

Question 4

snRNA is involved in which of the following processes?

Accepted Answer

A)  splicing 
B)  transcription 
C)  translation 
D)  none of these 
A)  splicing 
B)  transcription 
C)  translation 
D)  none of these

Question 5

Which of the following most completely describes the sugar found in DNA?

Accepted Answer

A)  β-2-deoxyribose 
B)  β-2-deoxy-D-ribose 
C)  β-2-deoxy-L-ribose 
D)  β-3-deoxy-D-ribose 
A)  β-2-deoxyribose 
B)  β-2-deoxy-D-ribose 
C)  β-2-deoxy-L-ribose 
D)  β-3-deoxy-D-ribose

Question 6

Which of the following hold the DNA and histones together in nucleosomes?

Accepted Answer

A)  covalent bonds 
B)  dipole-dipole interactions 
C)  hydrogen bonds 
D)  ionic forces 
A)  covalent bonds 
B)  dipole-dipole interactions 
C)  hydrogen bonds 
D)  ionic forces

Question 7

Which of the following is true of the base content of DNA?

Accepted Answer

A)  moles of adenine = moles of cytosine 
B)  moles of adenine = moles guanine 
C)  moles of adenine = moles of thymine 
D)  none of the above 
A)  moles of adenine = moles of cytosine 
B)  moles of adenine = moles guanine 
C)  moles of adenine = moles of thymine 
D)  none of the above

Question 8

Approximately how many nucleotides are in the Okazaki fragments in eukaryotes?

Accepted Answer

A)  20 
B)  200 
C)  2000 
D)  20,000 
A)  20 
B)  200 
C)  2000 
D)  20,000

Question 9

Which of the following holds the complementary base pairs of DNA together?

Accepted Answer

A)  covalent bonds 
B)  dipole-dipole interactions 
C)  hydrogen bonds 
D)  ionic bonds 
A)  covalent bonds 
B)  dipole-dipole interactions 
C)  hydrogen bonds 
D)  ionic bonds

Question 10

Which of the following is true of mRNA?

Accepted Answer

A)  It has a fixed size of 750 nucleotides. 
B)  It has a high concentration. 
C)  It is a long lived molecule. 
D)  Its nucleotide sequence is complementary to that of one strand of DNA. 
A)  It has a fixed size of 750 nucleotides. 
B)  It has a high concentration. 
C)  It is a long lived molecule. 
D)  Its nucleotide sequence is complementary to that of one strand of DNA.

Question 11

Which type of RNA is important in the timing of an organism's development?

Accepted Answer

A)  mRNA 
B)  miRNA 
C)  snRNA 
D)  tRNA 
A)  mRNA 
B)  miRNA 
C)  snRNA 
D)  tRNA

Question 12

Which of the following describes the large ribosomal unit of prokaryotes?

Accepted Answer

A)  one molecule of rRNA and approximately 20 different proteins 
B)  one molecule of rRNA and approximately 35 different proteins 
C)  two molecules of rRNA and approximately 20 different proteins 
D)  two molecules of rRNA and approximately 35 different proteins 
A)  one molecule of rRNA and approximately 20 different proteins 
B)  one molecule of rRNA and approximately 35 different proteins 
C)  two molecules of rRNA and approximately 20 different proteins 
D)  two molecules of rRNA and approximately 35 different proteins

Question 13

Which of the following is true of mRNA?

Accepted Answer

A)  It is of fixed size, 750 nucleotides. 
B)  It is of fixed size, 75 nucleotides. 
C)  It is of variable size, average of about 750 nucleotides. 
D)  It is of variable size, average of about 75 nucleotides. 
A)  It is of fixed size, 750 nucleotides. 
B)  It is of fixed size, 75 nucleotides. 
C)  It is of variable size, average of about 750 nucleotides. 
D)  It is of variable size, average of about 75 nucleotides.

Question 14

Which of the following scientists did not win a Nobel Prize for work on DNA?

Accepted Answer

A)  F. Crick 
B)  R. Franklin 
C)  J. Watson 
D)  M. Wilkens 
A)  F. Crick 
B)  R. Franklin 
C)  J. Watson 
D)  M. Wilkens

Question 15

Which type of RNA performs a protective function in many organisms?

Accepted Answer

A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA 
A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA

Question 16

Which of the following is true of B-DNA?

Accepted Answer

A)  It is a perfectly uniform helix with no grooves. 
B)  It is a helix with a single type of groove. 
C)  It is a helix with two types of grooves - major and minor. 
D)  It is a helix with three types of grooves - major, intermediate and minor. 
A)  It is a perfectly uniform helix with no grooves. 
B)  It is a helix with a single type of groove. 
C)  It is a helix with two types of grooves - major and minor. 
D)  It is a helix with three types of grooves - major, intermediate and minor.

Question 17

Which of the following is the sugar to phosphate linkage in individual nucleotides?

Accepted Answer

A)  2' 
B)  3' 
C)  4' 
D)  5' 
A)  2' 
B)  3' 
C)  4' 
D)  5'

Question 18

If a molecule of human DNA were fully stretched out approximately how long would it be?

Accepted Answer

A)  1 mm 
B)  1 cm 
C)  1 m 
D)  5 m 
A)  1 mm 
B)  1 cm 
C)  1 m 
D)  5 m

Question 19

Which of the following best describes the three dimensional structure of tRNA?

Accepted Answer

A)  a cloverleaf 
B)  a double helix 
C)  an L-shape 
D)  a single helix 
A)  a cloverleaf 
B)  a double helix 
C)  an L-shape 
D)  a single helix

Question 20

Which type of RNA degrades specific mRNA molecules?

Accepted Answer

A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA 
A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA

Exam 25: Nucleotides, Nucleic Acids, and Heredity

Which pair of bases is linked together by two hydrogen bonds?

Genes are located in which type of molecules?

Which of the following correctly describes satellites and telomeres?

snRNA is involved in which of the following processes?

Which of the following most completely describes the sugar found in DNA?

Which of the following hold the DNA and histones together in nucleosomes?

Which of the following is true of the base content of DNA?

Approximately how many nucleotides are in the Okazaki fragments in eukaryotes?

Which of the following holds the complementary base pairs of DNA together?

Which of the following is true of mRNA?

Which type of RNA is important in the timing of an organism's development?

Which of the following describes the large ribosomal unit of prokaryotes?

Which of the following is true of mRNA?

Which of the following scientists did not win a Nobel Prize for work on DNA?

Which type of RNA performs a protective function in many organisms?

Which of the following is true of B-DNA?

Which of the following is the sugar to phosphate linkage in individual nucleotides?

If a molecule of human DNA were fully stretched out approximately how long would it be?

Which of the following best describes the three dimensional structure of tRNA?

Which type of RNA degrades specific mRNA molecules?

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