TLS Online TPP Program

#Question id: 2018


What aspect of the immune response would a patient who has a parasitic worm infection and another patient responding to an allergen such as ragweed pollen have in common?

#Section 2: General Biology
  1. Both patients would have an increase in cytotoxic T cell number.

  2. Both patients would have increased levels of IgE.

  3. Both patients would risk development of an autoimmune disease.

  4. Both patients would be suffering from a decreased level of innate immunity.

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TLS Online TPP Program

#Question id: 3754

#Section 3: Genetics, Cellular and Molecular Biology

Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?

TLS Online TPP Program

#Question id: 3755

#Section 3: Genetics, Cellular and Molecular Biology

In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication. Which of the following events would you expect to occur as a result of this mutation?

TLS Online TPP Program

#Question id: 3756

#Section 3: Genetics, Cellular and Molecular Biology

 In E. coli, which enzyme catalyzes the elongation of a new DNA strand in the 5' → 3' direction?

TLS Online TPP Program

#Question id: 3757

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following characteristics of eukaryotic telomeres cause them to replicate differently than the rest of the chromosome?

TLS Online TPP Program

#Question id: 3758

#Section 3: Genetics, Cellular and Molecular Biology

 At a specific area of a chromosome, the sequence of nucleotides below is present where the chain opens to form a replication fork:

3' C C T A G G C T G C A A T C C 5'

An RNA primer is formed starting at the underlined T (T) of the template. Which of the following represents the primer sequence?

TLS Online TPP Program

#Question id: 3759

#Section 3: Genetics, Cellular and Molecular Biology

In E. coli, to repair a thymine dimer by nucleotide excision repair, in which order do the necessary enzymes act?