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#Question id: 3344


Which of the following statements is NOT correct regarding effect of genetic drift?

#Section 3: Genetics, Cellular and Molecular Biology
  1. Probability which allele is fixed or lost per generation is greater in large population

  2. Non directional random fluctuation

  3. It reduce genetic variation within populations

  4. It caused fixation of neutral allele

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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?