Question 1

The connection that exists between genes and hereditary traits requires the deciphering of the information encoded in genes into

Accepted Answer

A)  amino acids.
B)  nucleotides.
C)  proteins.
D)  histone molecules.
E)  complementary bases.F) C) and D)
G) C) and E)

Question 2

The essence of heredity is the ability of cells to use the information in their DNA to bring about the production of particular ________,thereby affecting what the cells will be like.

Accepted Answer

A)  proteins
B)  ribosomes
C)  RNAs
D)  helicasesE) None of the above
F) All of the above

Question 3

You are constructing a model of the RNA holoeznyme.You should

Accepted Answer

A)  start with the  α\alphaα  subunits and then add the core polymerase consisting of the  β\betaβ   β\betaβ '   σ\sigmaσ  subunits.
B)  start with the core polymerase consisting of the  β\betaβ   β\betaβ ' subunits and then add the  β\betaβ   σ\sigmaσ  subunits.
C)  start with the core polymerase consisting of the  β\betaβ   β\betaβ '   σ\sigmaσ  subunits and then add the  α\alphaα  subunit.
D)  start with the core polymerase consisting of the  α\alphaαβ\betaβ   β\betaβ ' subunits and then add the   σ\sigmaσ  subunit. E) None of the above
F) A) and B)

Question 4

Ribosome movement along the mRNA transcript is called

Accepted Answer

A)  transcription.
B)  translation.
C)  replication.
D)  translocation.
E)  mutation.F) B) and E)
G) A) and B)

Question 5

The process that occurs when a ribosome moves three more nucleotides along the mRNA molecule in the 5' to 3' direction is referred to as

Accepted Answer

A)  transduction.
B)  translation.
C)  translocation.
D)  transposon.E) B) and D)
F) None of the above

Question 6

The results suggest that regulatory region(s) lie

Accepted Answer

A)  between -150 to -120 and between -30 to 0.
B)  between -30 and 0 only.
C)  between -120 and -30.
D)  between -120 to -90,between -30 to 0.E) B) and D)
F) B) and C)

Question 7

The enzyme that initiates transcription is

Accepted Answer

A)  RNA polymerase.
B)  DNA polymerase.
C)  carbonic anhydrase.
D)  ATP synthetase.
E)  transformation principlE.F) C) and E)
G) B) and D)

Question 8

The initiation complex for protein synthesis contains all of the following except

Accepted Answer

A)  a small ribosomal subunit.
B)  mRNA.
C)  tRNA with methionine.
D)  a release factor.
E)  an initiation factor.F) C) and D)
G) A) and B)

Question 9

How many unique mRNA codons can be constructed from the four different RNA nucleotides?

Accepted Answer

A)  4
B)  8
C)  16
D)  32
E)  64F) C) and D)
G) A) and C)

Question 10

The expression of a gene involves two phases,___________ and translation.

Accepted Answer

A)  replication
B)  transcription
C)  unwinding
D)  condensationE) A) and C)
F) B) and C)

Question 11

Ribosomes are complex arrangements of

Accepted Answer

A)  RNA and DNA.
B)  RNA and large proteins.
C)  RNA and sugars.
D)  DNA and proteins.
E)  nucleosomes and RNA.F) B) and D)
G) A) and B)

Question 12

Which of the following is not true about eukaryotic DNA?

Accepted Answer

A)  It is an exceedingly long and fragile molecule.
B)  It is packaged into successively compact formations.
C)  The entire molecule has encoded information for protein synthesis.
D)  In the condensed form,it is transcriptionally inactive.
E)  It must be unpackaged before it can be transcribed into RNA.F) A) and E)
G) A) and B)

Question 13

Following transcription,the intron sequences are cut out of the primary transcript and the ends are joined again prior to its use in protein synthesis.This processing of the RNA is called RNA __________.

Accepted Answer

A)  modification
B)  translation
C)  splicing
D)  transcriptionE) A) and D)
F) A) and C)

Question 14

Most eukaryotic genes contain coding sequences called ________ that are interspersed with noncoding sequences.

Accepted Answer

A)  introns
B)  exons
C)  codons
D)  DNAE) B) and C)
F) A) and C)

Question 15

The sites A,P,and E are progressively occupied by amino acids being assembled into a chain in protein synthesis.These sites are part of

Accepted Answer

A)  small ribosomal subunit.
B)  large ribosomal subunit.
C)  mRNA.
D)  tRNA.
E)  DNA (the gene itself) .F) C) and D)
G) A) and D)

Question 16

Of the types of RNA polymerase that are known,which one is the most complex?

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) A) and B)
F) A) and D)

Question 17

Similar to the complementary purine-pyrimidine relationship observed in DNA,which of the following choices pairs with adenine in RNA?

Accepted Answer

A)  thymine
B)  cytosine
C)  guanine
D)  uracilE) B) and D)
F) C) and D)

Question 18

Exists as a complex with many large proteins in ribosomes;many different kinds of molecules.

Accepted Answer

A)  DNA
B)  RNA polymerase
C)  mRNA
D)  rRNAE) B) and C)
F) A) and C)

Question 19

You are working to characterize a novel protein in mice.Characterization of the mRNA expression pattern revealed that the gene is highly expressed in brain,muscle,liver,and pancreas.To determine the size of the corresponding protein,you make protein extracts from each of the tissues.Using an antibody that recognizes the C-terminal portion of the protein,you perform an analysis that allows you to visualize the extracted protein.Interestingly,you can detect the protein in brain,muscle,and liver,but not the pancreas.Assuming your extracts and reagents are good,and there is no human error,what is the most likely explanation for this result?

Accepted Answer

A)  Transcription levels in pancreas are too low.
B)  Translation levels in pancreas are too low.
C)  Alternative splicing in the pancreas leads to protein degradation.
D)  Alternative splicing in the pancreas yields a protein missing the portion of the protein to which the antibody was raiseD.E) None of the above
F) A) and B)

Question 20

Specific amino acids are attached to tRNA molecules by

Accepted Answer

A)  activating enzymes.
B)  codons.
C)  anticodons.
D)  ribosomes.
E)  initiation factors.F) B) and E)
G) A) and B)

Exam 15: Genes and How They Work

Following transcription,the intron sequences are cut out of the primary transcript and the ends are joined again prior to its use in protein synthesis.This processing of the RNA is called RNA __________.

Correct Answer
verified

You are constructing a model of the RNA holoeznyme.You should

Correct Answer
verified

Which of the following is not true about eukaryotic DNA?

Correct Answer
verified

How many unique mRNA codons can be constructed from the four different RNA nucleotides?

Correct Answer
verified

The connection that exists between genes and hereditary traits requires the deciphering of the information encoded in genes into

Correct Answer
verified

Ribosomes are complex arrangements of

Correct Answer
verified

Specific amino acids are attached to tRNA molecules by

Correct Answer
verified

The essence of heredity is the ability of cells to use the information in their DNA to bring about the production of particular ________,thereby affecting what the cells will be like.

Correct Answer
verified

The process that occurs when a ribosome moves three more nucleotides along the mRNA molecule in the 5' to 3' direction is referred to as

Correct Answer
verified

The sites A,P,and E are progressively occupied by amino acids being assembled into a chain in protein synthesis.These sites are part of

Correct Answer
verified

Ribosome movement along the mRNA transcript is called

Correct Answer
verified

Of the types of RNA polymerase that are known,which one is the most complex?

Correct Answer
verified

Most eukaryotic genes contain coding sequences called ________ that are interspersed with noncoding sequences.

Correct Answer
verified

The initiation complex for protein synthesis contains all of the following except

Correct Answer
verified

The results suggest that regulatory region(s) lie

Correct Answer
verified

Similar to the complementary purine-pyrimidine relationship observed in DNA,which of the following choices pairs with adenine in RNA?

Correct Answer
verified

The enzyme that initiates transcription is

Correct Answer
verified

The expression of a gene involves two phases,___________ and translation.

Correct Answer
verified

Correct Answer
verified

Exists as a complex with many large proteins in ribosomes;many different kinds of molecules.

Correct Answer
verified

Exam 15: Genes and How They Work

Following transcription,the intron sequences are cut out of the primary transcript and the ends are joined again prior to its use in protein synthesis.This processing of the RNA is called RNA __________.

Correct AnswerverifiedShow Answer

You are constructing a model of the RNA holoeznyme.You should

Correct AnswerverifiedShow Answer

Which of the following is not true about eukaryotic DNA?

Correct AnswerverifiedShow Answer

How many unique mRNA codons can be constructed from the four different RNA nucleotides?

Correct AnswerverifiedShow Answer

The connection that exists between genes and hereditary traits requires the deciphering of the information encoded in genes into

Correct AnswerverifiedShow Answer

Ribosomes are complex arrangements of

Correct AnswerverifiedShow Answer

Specific amino acids are attached to tRNA molecules by

Correct AnswerverifiedShow Answer

The essence of heredity is the ability of cells to use the information in their DNA to bring about the production of particular ________,thereby affecting what the cells will be like.

Correct AnswerverifiedShow Answer

The process that occurs when a ribosome moves three more nucleotides along the mRNA molecule in the 5' to 3' direction is referred to as

Correct AnswerverifiedShow Answer

The sites A,P,and E are progressively occupied by amino acids being assembled into a chain in protein synthesis.These sites are part of

Correct AnswerverifiedShow Answer

Ribosome movement along the mRNA transcript is called

Correct AnswerverifiedShow Answer

Of the types of RNA polymerase that are known,which one is the most complex?

Correct AnswerverifiedShow Answer

Most eukaryotic genes contain coding sequences called ________ that are interspersed with noncoding sequences.

Correct AnswerverifiedShow Answer

The initiation complex for protein synthesis contains all of the following except

Correct AnswerverifiedShow Answer

The results suggest that regulatory region(s) lie

Correct AnswerverifiedShow Answer

Similar to the complementary purine-pyrimidine relationship observed in DNA,which of the following choices pairs with adenine in RNA?

Correct AnswerverifiedShow Answer

The enzyme that initiates transcription is

Correct AnswerverifiedShow Answer

The expression of a gene involves two phases,___________ and translation.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Exists as a complex with many large proteins in ribosomes;many different kinds of molecules.

Correct AnswerverifiedShow Answer

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