Quizlet - Quiz Questions or Practice Questions Similar to/Same as Exam Questions PDF

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Quiz Questions or Practice Questions Similar to/Same as Exam Questions...

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Unit 4 Exam - Discussion Questions Study online at quizlet.com/_4r2jlw 1.

Adenine can form how many hydrogen bonds with Uracil?

B. 2

7.

A. 1 B. 2 C. 3 D. 4 2.

The ___ assists the polymerase in finding the correct promoter site.

3.

8.

During the formation of the lariat in the B. splicing of pre-mRNA, the 2'-OH of the A transesterification branch site undergoes what type of reaction with the 5' splice site of the intron?

In regards to the lactose operon, E. None of the maximal gene expression of the 3 choices above proteins required for lactose degradation are correct occurs when the repressor is ____________ to the operon, in addition to ________ levels of cyclic AMP. A. Bound; high B. Not bound; low C. Bound; low D. Bound; medium E. None of the choices above are correct

5.

Rho dependent termination occurs in sequences ____ and ____.

9.

Sigma factors only aid a single polymerase before dissociating from the active enzyme.

10.

A. True B. False

What are benefits of processing mRNA?

What are the four major nucleotides that link to form DNA? A. Deoxyadenosine, deoxyguanosine, deoxycytidine, and thymidine B. Adenine, guanine, cytosine, and thymine C. Deoxyadenylate, deoxyguanylate, deoxycytidylate, and thymidylate D. Adenosine, guanosine, cytidine, and uridine

B. poor in G, rich in C

B. False

A. Adenine and Guanine Cytosine, Thymine and Uracil

D. All of the above

A. Protect mRNAs from premature degradation B. Additional levels of gene regulation possible C. Assists in engaging the ribosome D. All of the above

A. rich in A, poor in U B. poor in G, rich in C C. rich in G, poor in C D. rich in A, poor in G 6.

The two bases that are derivatives of purine are _________, whereas the two bases that are derivatives of pyrimidine are __________. A. Adenine and Guanine - Cytosine, Thymine and Uracil B. Adenine and Thymine - Guanine and Cytosine C. Guanine and Uracil - Adenine, Cytosine and Thymine D. Adenine and Guanine - Thymine and Cytosine

A. hydrolysis B. transesterification C. acylation D. amination 4.

A. Rho protein (ρ)

A. Rho protein (ρ) B. Terminase protein C. Ribonucleoside triphosphate protein D. Sigma protein (σ)

D. Sigma factor

A. Rho protein B. Terminase protein C. Holoenzyme D. Sigma factor

This protein helps to terminate the transcription of some genes in RNA synthesis and is an ATP-dependent protein. It "races" along the nascent RNA strand until it collides with the RNA polymerase and stops transcription.

11.

What are the three stages of RNA synthesis? A. Initiation, Elongation, and Termination B. Transcription, Translation, and Termination C. Initiation, Termination, and Elongation D. Replication, Transcription, and Translation E. None of the above answers are correct

C. Deoxyadenylate, deoxyguanylate, deoxycytidylate, and thymidylate

A. Initiation, Elongation, and Termination

12.

13.

What is the major relationship between B. Chromatin is the DNA and chromatin? entire complex of a cell's DNA and its A. DNA is found in all diploid cells, associated proteins whereas chromatin is found only in haploid cells to assist with cell replication B. Chromatin is the entire complex of a cell's DNA and its associated proteins C. Chromatin is unwound DNA that occurs during DNA replication D. Chromatin is DNA that has supercoiled onto itself and can take multiple forms What is the structural difference between DNA and RNA?

What type of forces helps stabilize DNA between base pairs?

17.

B. Hydrogen bonds

A. Van der walls forces B. Hydrogen bonds C. electrostatic bonds D. aminobase bonds 15.

Which of the following statements C. Stabilizes RNA regarding mRNA processing is TRUE? A. Phosphohydrolase removes alpha-P of 5' terminal NTP B. Occurs before initiation C. Stabilizes RNA D. Inhibits translation

Which one of the answer choices below describes a correct relationship between DNA and RNA synthesis?

C. DNA synthesis cannot start de novo and thus requires a primer, whereas RNA synthesis requires no primer.

A. DNA synthesis proceeds in the 5' ⟶ 3' direction, whereas RNA synthesis proceeds in the 3' ⟶ 5' direction. B. DNA synthesis and RNA synthesis both occur in the 3' ⟶ 5' direction. C. DNA synthesis cannot start de novo and thus requires a primer, whereas RNA synthesis requires no primer. D. Neither DNA synthesis or RNA synthesis can start de novo, and thus both require a primer.

D. All the above answers are correct.

A. The sugar in DNA is deoxyribose whereas the sugar in RNA is ribose. B. The four major bases in DNA and RNA are the same, except one of the major bases in RNA is uracil instead of thymine. C. DNA is double stranded and forms a double-helical structure, whereas RNA is single stranded and can sometimes form elaborate structures. D. All the above answers are correct. E. Only A and B are correct. 14.

16.

Which one of the following enzymes prevents the lagging strand from being shortened every time it is replicated in linear DNA? A. Topoisomerase B. Primase C. Terminase D. Ligase E. Telomerase

E. Telomerase...