Question 1

The nuclear genome of Species A is three times as large as the nuclear genome of Species B.
Review portions of section 17.2 pertaining to genome size.  What are some potential explanations for the larger size of Species A's genome? Select all that apply.

Accepted Answer

A)   Species A has a more complex body plan than Species B.
B)   Species A has many repetitive sequences of DNA while Species B has relatively few.
C)   Species A has larger cells than Species B
D)   Species A has more complex cells than Species B.E) C) and D)
F) B) and D)

Question 2

How many genes are generally found for every million bases of prokaryotic DNA?

Accepted Answer

A)  10
B)  100
C)  1,000
D)  10,000
E)  100,000F) A) and E)
G) A) and C)

Question 3

14 homologous genes encoding globins (hemoglobin,myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago.What term best describes the relationship between these genes?

Accepted Answer

A)  sister chromatids
B)  gene family
C)  gene cluster
D)  moderately repetitive sequences
E)  highly repetitive sequencesF) C) and D)
G) A) and D)

Question 4

Which of the following statements is TRUE of highly repetitive sequences?

Accepted Answer

A)  They play a vital role in transcription.
B)  They play a vital role in translation.
C)  They can be found millions of times in a eukaryotic genome.
D)  They typically increase fitness of the organism.
E)  They typically decrease fitness of the organism.F) D) and E)
G) None of the above

Question 5

A researcher is interested in comparing the DNA sequence for the gene encoding myosin between a cheetah (mammal) and a red snapper (fish) .What database would be most helpful to her?

Accepted Answer

A)  GenBank
B)  Swiss Prot
C)  PIR (Protein Information Resource) 
D)  GenPept
E)  PDB (Protein Data Bank) F) A) and C)
G) D) and E)

Question 6

A researcher has mapped the entire genome of an insect.She notices that the genome contains around a thousand copies of a particular DNA sequence.What is the most likely function of this DNA sequence?

Accepted Answer

A)  The sequence most likely has no function.
B)  Its function is to code for rRNA.
C)  Its function is to provide antibiotic resistance.
D)  Its function is to copy and move within the genome via an RNA intermediate.E) C) and D)
F) A) and D)

Question 7

What is required for the transposition of a retroelement? Select all that apply.

Accepted Answer

A)   transposase
B)   RNA polymerase
C)   Reverse transcriptase
D)   IntegraseE) C) and D)
F) A) and B)

Question 8

What tool would best help researchers determine if two genes are homologous to each other?

Accepted Answer

A)  Punnett square
B)  BLAST program
C)  GenBank database
D)  polypeptide structure
E)  geometric analysisF) A) and E)
G) A) and D)

Question 9

Which pair of organisms would have the most homologous b-globin genes?

Accepted Answer

A)  dolphin and bumble bee
B)  catfish and crocodile
C)  snake and mouse
D)  frog and cheetah
E)  human and chimpanzeeF) A) and E)
G) B) and E)

Question 10

A nerve cell and a brain cell taken from the same individual would have two different sets of genes.

Accepted Answer

A) True 
 B)False

Question 11

Homologous chromosomes pair with each other during meiosis,but are misaligned.What is the likely outcome if crossing over occurs?

Accepted Answer

A)  One daughter chromosome contains a gene duplication,the other three are normal.
B)  One daughter chromosome contains a gene deletion,the other three are normal.
C)  Two daughter chromosomes contain a gene duplication,the other two are normal.
D)  Two daughter chromosomes contain a gene deletion,the other two are normal.
E)  One daughter chromosome contains a gene duplication,one contains a gene deletion,and the remaining two are normal.F) D) and E)
G) C) and D)

Question 12

At the time that transposable elements were discovered by Barbara McClintock,many of her colleagues agreed with her discovery.

Accepted Answer

A) True 
 B)False

Question 13

Homologous genes in different species are called

Accepted Answer

A)  analogs.
B)  paralogs.
C)  orthologs.
D)  dialogs.
E)  monologs.F) A) and B)
G) A) and C)

Question 14

What functions does transposase perform during transposition of a DNA transposon? Select all that apply.

Accepted Answer

A)   Recognizes inverted repeats at the end of the TE.
B)   Cleaves the ends of the TE.
C)   Moves TE to a new site in the genome.
D)   Cleaves target DNA in a staggered manner.
E)   Fills in the base pairs at the staggered ends of the target DNA.F) None of the above
G) A) and B)

Question 15

A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase,which functions in the metabolism of phenylalanine,with known database sequences.Which of the following would most likely provide the closest match?

Accepted Answer

A)  green pufferfish
B)  zebrafish
C)  chicken
D)  orangutan
E)  fruit flyF) A) and E)
G) None of the above

Question 16

What is true of the comparison between the myosin of a rat and a mouse?

Accepted Answer

A)  The nucleotide sequences are identical.
B)  The genes encode for different proteins.
C)  Each species has accumulated random mutations,but the sequences are similar.
D)  Both species are so far apart that there is no homology between the two sequences.
E)  The genes encoding myosin closely resemble those encoding actins.F) D) and E)
G) A) and B)

Exam 17: Genomes, Repetitive Sequences, and Bioinformatics

Homologous chromosomes pair with each other during meiosis,but are misaligned.What is the likely outcome if crossing over occurs?

Correct Answer
verified

At the time that transposable elements were discovered by Barbara McClintock,many of her colleagues agreed with her discovery.

Correct Answer
verified

Homologous genes in different species are called

Correct Answer
verified

A researcher is interested in comparing the DNA sequence for the gene encoding myosin between a cheetah (mammal) and a red snapper (fish) .What database would be most helpful to her?

Correct Answer
verified

What functions does transposase perform during transposition of a DNA transposon? Select all that apply.

Correct Answer
verified

What is true of the comparison between the myosin of a rat and a mouse?

Correct Answer
verified

A researcher has mapped the entire genome of an insect.She notices that the genome contains around a thousand copies of a particular DNA sequence.What is the most likely function of this DNA sequence?

Correct Answer
verified

What is required for the transposition of a retroelement? Select all that apply.

Correct Answer
verified

Which of the following statements is TRUE of highly repetitive sequences?

Correct Answer
verified

Which pair of organisms would have the most homologous b-globin genes?

Correct Answer
verified

14 homologous genes encoding globins (hemoglobin,myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago.What term best describes the relationship between these genes?

Correct Answer
verified

What tool would best help researchers determine if two genes are homologous to each other?

Correct Answer
verified

A nerve cell and a brain cell taken from the same individual would have two different sets of genes.

Correct Answer
verified

A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase,which functions in the metabolism of phenylalanine,with known database sequences.Which of the following would most likely provide the closest match?

Correct Answer
verified

How many genes are generally found for every million bases of prokaryotic DNA?

Correct Answer
verified

The nuclear genome of Species A is three times as large as the nuclear genome of Species B. Review portions of section 17.2 pertaining to genome size. What are some potential explanations for the larger size of Species A's genome? Select all that apply.

Correct Answer
verified

Exam 17: Genomes, Repetitive Sequences, and Bioinformatics

Homologous chromosomes pair with each other during meiosis,but are misaligned.What is the likely outcome if crossing over occurs?

Correct AnswerverifiedShow Answer

At the time that transposable elements were discovered by Barbara McClintock,many of her colleagues agreed with her discovery.

Correct AnswerverifiedShow Answer

Homologous genes in different species are called

Correct AnswerverifiedShow Answer

A researcher is interested in comparing the DNA sequence for the gene encoding myosin between a cheetah (mammal) and a red snapper (fish) .What database would be most helpful to her?

Correct AnswerverifiedShow Answer

What functions does transposase perform during transposition of a DNA transposon? Select all that apply.

Correct AnswerverifiedShow Answer

What is true of the comparison between the myosin of a rat and a mouse?

Correct AnswerverifiedShow Answer

A researcher has mapped the entire genome of an insect.She notices that the genome contains around a thousand copies of a particular DNA sequence.What is the most likely function of this DNA sequence?

Correct AnswerverifiedShow Answer

What is required for the transposition of a retroelement? Select all that apply.

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE of highly repetitive sequences?

Correct AnswerverifiedShow Answer

Which pair of organisms would have the most homologous b-globin genes?

Correct AnswerverifiedShow Answer

14 homologous genes encoding globins (hemoglobin,myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago.What term best describes the relationship between these genes?

Correct AnswerverifiedShow Answer

What tool would best help researchers determine if two genes are homologous to each other?

Correct AnswerverifiedShow Answer

A nerve cell and a brain cell taken from the same individual would have two different sets of genes.

Correct AnswerverifiedShow Answer

A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase,which functions in the metabolism of phenylalanine,with known database sequences.Which of the following would most likely provide the closest match?

Correct AnswerverifiedShow Answer

How many genes are generally found for every million bases of prokaryotic DNA?

Correct AnswerverifiedShow Answer

The nuclear genome of Species A is three times as large as the nuclear genome of Species B. Review portions of section 17.2 pertaining to genome size. What are some potential explanations for the larger size of Species A's genome? Select all that apply.

Correct AnswerverifiedShow Answer

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