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Exam 10: The Structure and Function of Dna

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Question 21

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What protects mRNA from attack by cellular enzymes?

A) RNA splicing
B) the removal of exons
C) the lack of RNA-digesting enzymes in the cytoplasm
D) a cap and tail

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Question 22

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Plant viruses ________.

A) often use RNA,rather than DNA,as their genetic material
B) benefit plants,rather than causing disease
C) cause diseases that can be easily cured
D) do not exist,as viruses attack only animals

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Question 23

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In a DNA double helix,adenine pairs with ________ and guanine pairs with ________.

RNA contains the nitrogenous base ________ instead of ________,which is found only in DNA.

How can bacteriophage DNA be spread from cell to cell without causing cell death?

If one strand of a DNA double helix has the sequence GTCCAT,what is the sequence of the other strand?

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

Flu vaccines have been demonstrated to protect the elderly,as shown in the figure below.Assume there is a sample of 100 elderly people that normally would be hospitalized in winter.How many of them would you predict would still be hospitalized in the winter if all 100 of them received the flu vaccine?

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

The DNA codon AGT codes for an amino acid carried by a tRNA with the anticodon ________.

Evidence for the spiral nature of DNA came from ________.

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

How many amino acids are common to all living systems?

An mRNA is expressed that begins with the sequence AUGCCAGGCGUC.Using the genetic code below,determine what peptide will be translated from this mRNA.

The backbone of DNA consists of ________.

Peptide bonds form between ________.

What name is given to the collection of traits exhibited by an organism?

The region of DNA where RNA synthesis begins is the ________.

As an experiment,you infect bacteria with an unknown virus to see how the bacteriophage affects the bacteria.After a few days,you notice that the bacterial population is growing normally and that the cells appear healthy.Assuming that the infection occurred,what can you conclude from your observations?

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