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Exam 10: The Structure and Function of DNA

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Question 21

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The RNA that is translated into a polypeptide is ______ RNA.

A) nuclear
B) ribosomal
C) transfer
D) messenger

E) B) and D)
F) B) and C)

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Question 22

Multiple Choice

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DNA replication

A) is a slow process that results in virtually no errors.
B) requires DNA polymerase and RNA polymerase.
C) is a very fast process that results in numerous errors.
D) requires the cooperation of over a dozen enzymes and other proteins.

E) B) and C)
F) B) and D)

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Question 23

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After replication,______.

The modern phrasing of Beadle and Tatum's hypothesis about relationships between genes and their products is "one gene-one ______."

Which of the following enzymes is responsible for RNA synthesis?

Examine the genetic code table,shown below.The codon AGC codes for the amino acid ______.

Transcription is the ______.

If adenine makes up 20% of the bases in a DNA double helix,what percent of the bases are guanine?

What protects mRNA from attack by cellular enzymes?

HIV (human immunodeficiency virus) must use its own ______ to reproduce.

Who discovered the structure of DNA?

The absence of a terminator in transcription will result in ______.

Please read the following scenario to answer the following question(s) . If you were asked to study the pattern of bacterial growth (increase in numbers over time) during an infection, you would find that numbers of bacteria increase exponentially up to a certain point. Assume that you have been asked to interpret the growth of bacteriophages. You infect the host bacteria and measure the increase of phages over a defined period of time. You plot the results and get the graph shown here. -The first thing you notice is that there is no immediate increase in viruses following infection.This is because ______.

DNA and RNA are polymers composed of ______ monomers.

During translation,what is the correct order of events that occur as an amino acid is added?

What is the ultimate source of all diversity?

The backbone of DNA consists of ______.

Please read the following scenario to answer the following question(s) . While working with cultured mouse cells, a researcher unknowingly treated the cells with a mutagen that causes the deletion or insertion of individual nucleotides in DNA. Subsequently, she isolated and cultured a single cell from this group. She noticed that the progeny of this cell were not producing a certain protein and that this affected their survival. -The mutation would be most harmful to the cells if it resulted in ______.

Where is translation accomplished?

Please read the following scenario to answer the following question(s) . If you were asked to study the pattern of bacterial growth (increase in numbers over time) during an infection, you would find that numbers of bacteria increase exponentially up to a certain point. Assume that you have been asked to interpret the growth of bacteriophages. You infect the host bacteria and measure the increase of phages over a defined period of time. You plot the results and get the graph shown here. -Once viruses are detected,the number of viruses increases rapidly.This is because ______.