Question 5 (1 point) The C-value paradox describes the observation that genome s
ID: 193576 • Letter: Q
Question
Question 5 (1 point)
The C-value paradox describes the observation that genome size does not correlate with organismal complexity; for example, some single-celled protists have genomes much larger than the human genome. What discovery helps resolve the C-value paradox?
Question 5 options:
RNA catalyzes biological reactions.
Most of the DNA in eukaryotic genomes does not encode proteins.
Chargaff's rule, which states that DNA from any organism should have a 1:1 ratio of pyrimidine and purine bases.
DNA in eukaryotic chromosomes is coiled around histones
Different species have different histone modifications, which can be inherited
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Question 6 (1 point)
Which of the following statements about repetitive DNA is NOT true?
Question 6 options:
Repetitive DNA was first detected because of its rapid reassociation kinetics.
Repetitive DNA sequences are often found in tandem clusters throughout the genome.
Repetitive DNA is restricted to non-transcribed regions of the genome.
Repetitive DNA is associated with the centromeres and telomeres in higher eukaryotes.
Transposable elements can contribute to the repetitive DNA fraction.
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RNA catalyzes biological reactions.
Most of the DNA in eukaryotic genomes does not encode proteins.
Chargaff's rule, which states that DNA from any organism should have a 1:1 ratio of pyrimidine and purine bases.
DNA in eukaryotic chromosomes is coiled around histones
Different species have different histone modifications, which can be inherited
Explanation / Answer
ANSWER 5
Equating complexity of living organism with genome size came to an end when it was discovered that the entire genome doesn't constitute the coding region and a large fraction of it might even be redundant or serve no purpose. Upon comparison of the actual working length that encoded genes and thereby proteins, we came to know that Most of the DNA in eukaryotic genomes does not encode proteins.
ANSWER 6
Repetitive DNA is restricted to non-transcribed regions of the genome is not true. They serve immensely important regulatory functions and constitute a very large fraction of the genome.
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