Question 1

Which mutation(s) may not result in an amino acid change in the protein product?

Accepted Answer

A)  deletion and insertion
B)  deletion and substitution
C)  insertion and substitution
D)  substitution only
E)  insertion only

Question 2

In prokaryotes,transcription occurs in the _____.

Accepted Answer

A)  mitochondria
B)  cytoplasm
C)  ribosomes
D)  nucleus
E)  endoplasmic reticulum

Question 3

Match each term with the most appropriate description.
-guided and catalyzed by RNA polymerases

Accepted Answer

A)  anticodon
B)  rRNA
C)  codon
D)  ribosome
E)  genetic codeF) translation terminationG) messenger RNAH) promotersI) transcriptionJ) translation

Question 4

Amino acids are carried to ribosomes by____ RNA.

Accepted Answer

A)  template
B)  messenger
C)  transfer
D)  ribosomal
E)  retriever

Question 5

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

Accepted Answer

A)  sequencer
B)  promoter
C)  activator
D)  terminator
E)  transcriber

Question 6

Match each term with the most appropriate description.
-all of the mRNA codons

Accepted Answer

A)  anticodon
B)  rRNA
C)  codon
D)  ribosome
E)  genetic codeF) translation terminationG) messenger RNAH) promotersI) transcriptionJ) translation

Question 7

In mammals,X chromosome inactivation results in _____.

Accepted Answer

A)  a total inactivation of both female X chromosomes
B)  only the inactivation of the paternal X chromosome in females
C)  only the inactivation of the maternal X chromosome in females
D)  the random inactivation of either the paternal  or the maternal X in females
E)  the inactivation of the maternal X chromosome in males

Question 8

How many different amino acids are found in humans?

Accepted Answer

A)  4
B)  8
C)  12
D)  16
E)  20

Question 9

Which process is responsible for the conversion of DNA information into messenger RNA?

Accepted Answer

A)  replication
B)  transcription
C)  duplication
D)  translation
E)  synthesis

Question 10

The type of RNA that carries protein-building information is called _____.

Accepted Answer

A)  ribosomal RNA
B)  transfer RNA
C)  messenger RNA
D)  reader RNA
E)  translator RNA

Question 11

Mutations in an intron region of a gene are most likely to _____.

Accepted Answer

A)  prevent mRNA from being synthesized
B)  trap mRNA inside the nucleus
C)  prevent mRNA from being recognized by the ribosome
D)  result in no changes in the amino acid sequence
E)  alter the amino acid sequence

Question 12

The activity of the ribosome in translation is analogous to a(n) _____.

Accepted Answer

A)  assembly line
B)  dance
C)  planet racing around the sun
D)  foot race
E)  chess game

Question 13

Ribosome inactivating proteins (RIPs) inhibit protein synthesis by preventing _____.

Accepted Answer

A)  mRNA from binding to the ribosome
B)  tRNA from binding to the ribosome
C)  the two halves of the ribosome from coming together
D)  the ribosome from moving forward from one codon to the next
E)  the newly synthesized amino acid chain from being released from the ribosome

Question 14

Which of the following processes is/are part of gene expression? I.transduction II.transcription III.translation

Accepted Answer

A)  I and II
B)  I and III
C)  II and III
D)  I, II, and III
E)  III only

Question 15

Female secondary sexual traits,such as functional breasts and fat deposits around the hips and thighs,are determined by _____.

Accepted Answer

A)  the presence of the master gene, SRY
B)  increased concentration of gene products from the two X chromosomes
C)  absence of gene products from the Y chromosome
D)  sex hormones
E)  maternal influence

Question 16

Ricin exerts its effects on a human cell by _____.

Accepted Answer

A)  inactivating synthesis of carbohydrates
B)  inhibiting hydrolysis of carbohydrates
C)  preventing protein synthesis
D)  interfering with hydrolysis of lipids
E)  over activating nucleic acid metabolism

Question 17

How many different codons are part of the genetic code?

Accepted Answer

A)  4
B)  16
C)  32
D)  64
E)  128

Question 18

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once.
-A deletion in the beta globin gene leads to this type of mutation,causing beta-thalassemia.

Accepted Answer

A)  Deletion only
B)  Insertion only
C)  Base-pair substitution
D)  Frame-shift mutation

Question 19

The tightly condensed non-functional X chromosome is called a(n) _____.

Accepted Answer

A)  Barr body
B)  Y chromosome
C)  autosome
D)  X linked chromosome
E)  Watson segment

Question 20

What does it mean that the genetic code is "highly conserved"?

Accepted Answer

A)  it is almost universal and has not changed in millions of years
B)  it resists modification from environmental mutagens
C)  organisms can only use it a certain number of times
D)  all organisms and organelles - without exception - have the exact same genetic code
E)  the products of the genetic code - proteins - are almost the same in all organisms

Exam 7: Gene Expression AND Control

Match each term with the most appropriate description. -all of the mRNA codons

Correct AnswerverifiedShow Answer

Match each term with the most appropriate description. -guided and catalyzed by RNA polymerases

Correct AnswerverifiedShow Answer

The type of RNA that carries protein-building information is called _____.

Correct AnswerverifiedShow Answer

In prokaryotes,transcription occurs in the _____.

Correct AnswerverifiedShow Answer

Which of the following processes is/are part of gene expression? I.transduction II.transcription III.translation

Correct AnswerverifiedShow Answer

Which process is responsible for the conversion of DNA information into messenger RNA?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Identify the type of mutation associated with the following questions and statements.Some answers may be used more than once. -A deletion in the beta globin gene leads to this type of mutation,causing beta-thalassemia.

Correct AnswerverifiedShow Answer

Ribosome inactivating proteins (RIPs) inhibit protein synthesis by preventing _____.

Correct AnswerverifiedShow Answer

How many different amino acids are found in humans?

Correct AnswerverifiedShow Answer

The activity of the ribosome in translation is analogous to a(n) _____.

Correct AnswerverifiedShow Answer

How many different codons are part of the genetic code?

Correct AnswerverifiedShow Answer

Amino acids are carried to ribosomes by____ RNA.

Correct AnswerverifiedShow Answer

Female secondary sexual traits,such as functional breasts and fat deposits around the hips and thighs,are determined by _____.

Correct AnswerverifiedShow Answer

Which mutation(s) may not result in an amino acid change in the protein product?

Correct AnswerverifiedShow Answer

What does it mean that the genetic code is "highly conserved"?

Correct AnswerverifiedShow Answer

Mutations in an intron region of a gene are most likely to _____.

Correct AnswerverifiedShow Answer

The tightly condensed non-functional X chromosome is called a(n) _____.

Correct AnswerverifiedShow Answer

Ricin exerts its effects on a human cell by _____.

Correct AnswerverifiedShow Answer

In mammals,X chromosome inactivation results in _____.

Correct AnswerverifiedShow Answer

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