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REPLIKASI 1 1 INCORRECT Which of the following are limitations of DNA polymerase? A) it can only add bases to the exposed 5' end of a pre- existing strand B) it can only replicate the leading strand C) it can only replicate the lagging strand D) all of the above E)none of the above 2 CORRECT The enzyme ________ unzips and unwinds the DNA molecule. A) DNA polymerase B) helica se C) primas e D) DNA ligase E)unzipas e 3 INCORRECT Which of the following statements about DNA replication is TRUE? A) the leading strand is replicated continuously, while the lagging strand is replicated discontinuously

REPLIKASI 1

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Page 1: REPLIKASI 1

REPLIKASI 1

1 INCORRECT Which of the following are limitations of DNA polymerase?

A) it can only add bases to the exposed 5' end of a pre-existing strand

B)it can only replicate the leading strand

C)it can only replicate the lagging strand

D)all of the above

E)none of the above

2 CORRECT The enzyme ________ unzips and unwinds the DNA molecule.

A)DNA polymerase

B)helicase

C)primase

D)DNA ligase

E)unzipase

3 INCORRECT Which of the following statements about DNA replication is TRUE?

A)the leading strand is replicated continuously, while the lagging strand is replicated discontinuously

B)the leading strand is replicated discontinuously, while the lagging strand is replicated continuously

C)both the leading and lagging strands are replicated continuously

D)both the leading and lagging strands are replicated discontinuously

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E)each of the leading and lagging strands is replicated both continuously and discontinuously

4 CORRECTDNA replication results in two identical daughter molecules each consisting of one old (original) strand and one newly-synthesized strand.

A)True

B)False

5 INCORRECT The point where separation of the DNA occurs is called the replication fork.

A)True

B)False

REPLIKASI 2

1 CORRECT Which of the following are limitations of DNA polymerase?

A) it can only add bases to the exposed 3' end of a pre-existing strand

B)it can only replicate the leading strand

C)it can only replicate the lagging strand

D)all of the above

E)none of the above

2 CORRECT The enzyme ________ unzips and unwinds the DNA molecule.

A)DNA polymerase

B)helicase

Page 3: REPLIKASI 1

C)primase

D)DNA ligase

E)unzipase

3 INCORRECT Which of the following statements about DNA replication is TRUE?

A)the leading strand is replicated continuously, while the lagging strand is replicated discontinuously

B)the leading strand is replicated discontinuously, while the lagging strand is replicated continuously

C)both the leading and lagging strands are replicated continuously

D)both the leading and lagging strands are replicated discontinuously

E)each of the leading and lagging strands is replicated both continuously and discontinuously

4 INCORRECTDNA replication results in two identical daughter molecules each consisting of one old (original) strand and one newly-synthesized strand.

A)True

B)False

5 INCORRECT The point where separation of the DNA occurs is called the replication fork.

A)True

B)False

REPLIKASI 3

1 CORRECT Arrange the following proteins in the proper order in which they participate in DNA replication.1 = Primase2 = Helicase

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3 = Single-strand binding proteins4 = DNA polymerase

A)1, 2, 3, 4

B)1, 3, 2, 4

C)2, 3, 1, 4

D)2, 3, 4, 1

E)2, 4, 3, 1

2 CORRECT What is the function of the enzyme primase during DNA replication?

A)to unwind the double helix to prime it for replication

B)to prime DNA for replication by preventing the formation of knots

C)to add a DNA primer to enable replication of DNA

D)to add a RNA primer to enable replication of DNA

E)to correct errors made during DNA replication

3 INCORRECTThe short DNA segments formed on the discontinuously replicated strand are called

A)Kawasaki fragments.

B)Nagasaki fragments.

C)Miyazaki fragments.

D)Okazaki fragments.

E)Suzuki fragments.

4 INCORRECTAs helicase unwinds the DNA molecule, the separated strands are kept apart by DNA polymerase.

A)True

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B)False

5 INCORRECT DNA replication can begin at any site along the DNA molecule.

A)True

B)False

TRANSKRIPSI 1

1 INCORRECTThe segment of the DNA molecule where messenger RNA synthesis begins is called the...

A)promoter region.

B)sigma factor.

C)transcription terminator.

D)polymerase.

E)template.

2 INCORRECTThe complimentary messenger RNA strand that would be synthesized from the DNA base sequence of CTGAC would be...

A)GACTG

B)UGACU

C)AGTUG

D)GACUG

E)GACGU

3 CORRECTThe name of the structure that causes the synthesis of RNA to cease is called the...

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A)promoter region

B)sigma factor

C)transcription terminator

D)polymerase

E)template

4 CORRECT The synthesis of messenger RNA is called translation.

A)True

B)False

5 CORRECT Synthesis of a new strand of messenger RNA is in the 5' to 3' direction.

A)True

B)False

TRANSKRIPSI 2

1 CORRECT Synthesis of mRNA is

A) in the 5' to 3' direction with new nucleotides being added to the 5' end of the mRNA molecule.

B)in the 3' to 5' direction with new nucleotides being added to the 5' end of the mRNA molecule.

C)in the 5' to 3' direction with new nucleotides being added to the 3' end of the mRNA molecule.

D) in the 3' to 5' direction with new nucleotides being added to the 3' end of the mRNA molecule.

E)able to proceed either from the 5' to 3' or 3' to 5' direction.

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Feedback: Correct: mRNA is synthesized in the 5' to 3' direction with new nucleotides being added to the 3' end of the mRNA molecule.

2 INCORRECT Sigma factor is

A)a subunit of mRNA

B)a subunit of RNA polymerase

C)a subunit of DNA

D)an enzyme needed for transcription to proceed

E)the place on RNA where RNA polymerase attaches

Feedback: Incorrect: Sigma factor is a subunit of RNA polymerase, not an attachment site on RNA.

3 INCORRECT Transcription begins when RNA polymerase binds to the

A)terminator on DNA

B) initiator on DNA

C)promoter on DNA

D)promoter on RNA

Feedback: Incorrect: There is no initiator. RNA polymerase binds to the promoter.

4 INCORRECTWhen RNA polymerase reaches a specific sequence of nucleotides on the DNA called the transcription terminator, a hairpin loop structure forms on the DNA strand causing the RNA polymerase and mRNA to dissociate from the DNA.

A)True

B)False

Feedback: Incorrect: A hairpin loop forms on the RNA strand, not on the DNA, causing the RNA polymerase and mRNA to dissociate from the DNA.

5 INCORRECTRNA polymerase copies the template strand of DNA making single-stranded mRNA complementary to the DNA template.

A)True

Page 8: REPLIKASI 1

B)False

Feedback: Incorrect: The mRNA is made complementary to the DNA template.

TRANSLASIThe correct answer for each question is indicated by a  .

1 INCORRECT Translation is the synthesis of

A)mRNA from DNA.

B)mRNA from proteins.

C)proteins from DNA

D)proteins from mRNA

E)proteins from tRNA

2 INCORRECTWhich of the following occurs as the ribosome shifts down the mRNA by a distance of three nucleotides?

A)the tRNA that was in the A site moves into the E site

B)the tRNA that was in the P site moves into the A site

C)the tRNA that was in the E site moves into the P site

D)the tRNA that was in the E site moves into the A site

E)the tRNA that was in the P site moves into the E site

3 CORRECT Translation is terminated when a stop codon is presented at the ________ site.

A)A

B)P

C)E

D)either A or B

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E)either A or C

4 CORRECT The first amino acid enters through the A site.

A)True

B)False

5 CORRECT The codon of tRNA is complementary to the anticodon of mRNA.

A)True

B)False