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TLS Online TPP Program

#Question id: 18928

With respect to nucleic acid hybridization, which, if any, of the following statements is false?

#Unit 13. Methods in Biology
  1. The probe is a labeled nucleic acid or oligonucleotide that is expected to hybridize to a target DNA sequence within an unlabelled test nucleic acid population.
  2. The probe is a known single-stranded nucleic acid or oligonucleotide that is intended to hybridize to complementary target sequences in a poorly understood nucleic acid test sample.
  3. The object of a hybridization assay is to identify target sequences within a test sample that are related to the probe so that some new information is gained about the target sequences.
  4. During a hybridization assay, a heteroduplex is formed by un-natural base pairing between complementary probe and target sequences that show a sufficiently high degree of base pairing across part or all of their lengths.
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TLS Online TPP Program

#Question id: 4275

#Unit 3. Fundamental Processes

CCA-adding enzymes add a specific sequence without a template because
TLS Online TPP Program

#Question id: 973

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the atoms 5 and 7 during de novo biosynthesis of purines?
TLS Online TPP Program

#Question id: 13124

#Unit 10. Ecological Principles

A recent study of ecological footprints concluded that
TLS Online TPP Program

#Question id: 3659

#Unit 3. Fundamental Processes

In eukaryotes, gap filling in BER involves predominantly DNA polymerase β whereas the longer gaps generated in NER are filled by:
TLS Online TPP Program

#Question id: 12541

#Unit 10. Ecological Principles

The high levels of pesticides found in birds of prey is an example of