Question 1

Which of the following post-transcriptional modifications allow multiple forms of protein products from the same gene sequence?

Accepted Answer

A)   phosphorylation
B)   methylation
C)   alternative splicing
D)   poly-A tail
E)   5' nucleotide capF) B) and C)
G) A) and E)

Question 2

In eukaryotes,all of the different types of RNA are transcribed in the ____________.

Accepted Answer

A)   mitochondria
B)   cytoplasm
C)   ribosomes
D)   nucleus
E)   endoplasmic reticulumF) A) and B)
G) C) and D) D

Question 3

Mutation in globin genes cause a condition called ___________,which is marked by the decreased ability of a person's blood to carry oxygen.

Accepted Answer

A)   thalassemia
B)   myeloma
C)   aplastic anemia
D)   lymphoma
E)   anemiaF) D) and E)
G) B) and D)

Question 4

Which of the following is true about the genetic code?

Accepted Answer

A)   All organisms use essentially the same genetic code.
B)   The codon signaling the end of transcription also codes for an amino acid.
C)   There are multiple codons signaling the start of transcription.
D)   Each amino acid is specified by only one codon.
E)   A codon is three to six bases long.F) A) and C)
G) A) and B)

Question 5

The effects of mutation in human somatic cells have a low probability of causing harm because only _______ of human DNA encodes gene products.

Accepted Answer

A)   greater than 5 percent
B)   less than 2 percent
C)   less than 4 percent
D)   greater than 8 percent
E)   greater than 3 percentF) A) and E)
G) None of the above

Question 6

The form of RNA that carries the code from DNA to the site of protein assembly is called __________.

Accepted Answer

A)   messenger RNA.
B)   nuclear RNA.
C)   ribosomal RNA.
D)   transfer RNA.
E)   structural RNA.F) B) and E)
G) A) and E)

Question 7

Ribosomal subunits ____________.

Accepted Answer

A)   come together in threes to form functional units
B)   are composed of mRNA and structural proteins
C)   are synthesized in the cytoplasm
D)   converge with tRNA when mRNA is to be translated
E)   are transcribed from the complementary strand of DNA that is used for tRNA transcriptionF) B) and D)
G) A) and E)

Question 8

Classification. You will need a genetic code table to answer the following. The following statements refer to the five RNA codons listed below; match them appropriately:
-This codon terminates a coding region.

Accepted Answer

A)  AUG
B)  UAA
C)  UUU
D)  UUA
E)  AAAF) A) and D)
G) A) and C)

Question 9

A polysome is ______________.

Accepted Answer

A)   one of the units of a ribosome
B)   the nuclear organelle that synthesizes RNA
C)   an organelle that functions similarly to a ribosome during meiosis
D)   the two units of a ribosome considered together
E)   multiple ribosomal units attached to an mRNA strandF) B) and E)
G) None of the above E

Question 10

Mutations are ___________________.

Accepted Answer

A)   random
B)   beneficial
C)   always lethal
D)   always heritable
E)   largely predictableF) None of the above
G) B) and D) A

Question 11

DNA and RNA are alike in that they _____________.

Accepted Answer

A)   both have same pentose sugar
B)   use the same nitrogenous bases to assemble the genetic code
C)   have the same number of strands
D)   both contain nucleotides
E)   are both made in the cytoplasmF) A) and B)
G) B) and E)

Question 12

Classification. You will need a genetic code table to answer the following. The following statements refer to the five RNA codons listed below; match them appropriately:
-This codon codes for an amino acid and indicates the beginning of a coding region.

Accepted Answer

A)  AUG
B)  UAA
C)  UUU
D)  UUA
E)  AAAF) C) and D)
G) All of the above

Question 13

Which of the following initiates the process of transcription?

Accepted Answer

A)   RNA polymerase
B)   DNA polymerase
C)   Helicase
D)   Transfer RNA
E)   ExonsF) A) and E)
G) D) and E)

Question 14

Which of the following delivers amino acids to ribosomes,one by one,in the order specified by a messenger RNA?

Accepted Answer

A)   Transfer RNA
B)   Ribosomal RNA
C)   RNA polymerase
D)   DNA polymerase
E)   GeneF) C) and D)
G) None of the above

Question 15

The relationship between strands of RNA and DNA during transcription is ______________.

Accepted Answer

A)   antagonistic
B)   opposite
C)   complementary
D)   an exact duplicate
E)   unrelatedF) A) and B)
G) All of the above

Question 16

Choose the best matching element.
-Anticodon

Accepted Answer

A)  Results in a hairless appearance of the sphynx cat
B)  RNA-directed process involving polypeptide chains
C)  Sites at which RNA polymerases can bind and initiate transcription
D)  Is bound by a small subunit of a ribosome to begin translation
E)  Guided and catalyzed by RNA polymerasesF) Polypeptide chain elongation proceeds independently at each body in this clusterG) Adds nucleotides to the end of a growing RNAH) A tRNA triplet opposite a codonI) A set of three nucleotidesJ) C) and F)
K) B) and G)

Question 17

A segment of DNA that specifies a sequence of amino acids in a polypeptide is called a(n) ____________.

Accepted Answer

A)   codon
B)   intron
C)   messenger
D)   gene
E)   enzymeF) A) and E)
G) A) and D)

Question 18

The portion of the DNA molecule that is translated is composed of ______________.

Accepted Answer

A)   introns
B)   anticodons
C)   exons
D)   transcriptions
E)   exons and transcriptionsF) B) and E)
G) A) and D)

Question 19

Which of the following statements is true?

Accepted Answer

A)   Gene mutations never occur independently of each other.
B)   Gene mutations are very common.
C)   Ionizing radiation is caused by chromosomal damage.
D)   Mutations are random.
E)   The loci of gene mutations can be predicted.F) None of the above
G) B) and E)

Question 20

Transcription starts at a region of DNA called a(n) _____________.

Accepted Answer

A)   sequencer
B)   promoter
C)   activator
D)   terminator
E)   transcriberF) None of the above
G) B) and D)

Exam 9: From DNA to Protein

Which of the following post-transcriptional modifications allow multiple forms of protein products from the same gene sequence?

Correct AnswerverifiedShow Answer

In eukaryotes,all of the different types of RNA are transcribed in the ____________.

Correct AnswerverifiedD

Mutation in globin genes cause a condition called ___________,which is marked by the decreased ability of a person's blood to carry oxygen.

Correct AnswerverifiedShow Answer

Which of the following is true about the genetic code?

Correct AnswerverifiedShow Answer

The effects of mutation in human somatic cells have a low probability of causing harm because only _______ of human DNA encodes gene products.

Correct AnswerverifiedShow Answer

The form of RNA that carries the code from DNA to the site of protein assembly is called __________.

Correct AnswerverifiedShow Answer

Ribosomal subunits ____________.

Correct AnswerverifiedShow Answer

Classification. You will need a genetic code table to answer the following. The following statements refer to the five RNA codons listed below; match them appropriately: -This codon terminates a coding region.

Correct AnswerverifiedShow Answer

A polysome is ______________.

Correct AnswerverifiedE

Mutations are ___________________.

Correct AnswerverifiedA

DNA and RNA are alike in that they _____________.

Correct AnswerverifiedShow Answer

Classification. You will need a genetic code table to answer the following. The following statements refer to the five RNA codons listed below; match them appropriately: -This codon codes for an amino acid and indicates the beginning of a coding region.

Correct AnswerverifiedShow Answer

Which of the following initiates the process of transcription?

Correct AnswerverifiedShow Answer

Which of the following delivers amino acids to ribosomes,one by one,in the order specified by a messenger RNA?

Correct AnswerverifiedShow Answer

The relationship between strands of RNA and DNA during transcription is ______________.

Correct AnswerverifiedShow Answer

Choose the best matching element. -Anticodon

Correct AnswerverifiedShow Answer

A segment of DNA that specifies a sequence of amino acids in a polypeptide is called a(n) ____________.

Correct AnswerverifiedShow Answer

The portion of the DNA molecule that is translated is composed of ______________.

Correct AnswerverifiedShow Answer

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Transcription starts at a region of DNA called a(n) _____________.

Correct AnswerverifiedShow Answer

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