REPLIKASI 1

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

4

CORRECT

DNA 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 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

INCORRECT

DNA 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 3Arrange the following proteins in the proper order in which they participate in DNA replication. 1 = Primase 2 = Helicase 3 = Single-strand binding proteins 4 = 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

1

CORRECT

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

INCORRECT

The 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

INCORRECT

As helicase unwinds the DNA molecule, the separated strands are kept apart by DNA polymerase. A)True B)False

5

INCORRECT

DNA replication can begin at any site along the DNA molecule. A)True B)False

TRANSKRIPSI 1

1

INCORRECT

The 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

INCORRECT

The 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

CORRECT

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

INCORRECT

When 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

INCORRECT

RNA polymerase copies the template strand of DNA making single-stranded mRNA complementary to the DNA template. A)True 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

INCORRECT

Which 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 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