TLS Online TPP Program

#Question id: 1119


Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:

#Section 3: Genetics, Cellular and Molecular Biology
  1. are species specific

  2. always lead to the same cellular response

  3. amplify the original signal many times

  4. counter the harmful effects of phosphatases

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TLS Online TPP Program

#Question id: 3685

#Section 3: Genetics, Cellular and Molecular Biology

In prokaryotes, DNA replication begins at a single site that is rich in AT nucleotide sequence, where two strands unwind and separate. This ATP dependent process catalyzed by a protein

TLS Online TPP Program

#Question id: 3686

#Section 3: Genetics, Cellular and Molecular Biology

The short strand of ........ primer is required for the replication of DNA:

TLS Online TPP Program

#Question id: 3687

#Section 3: Genetics, Cellular and Molecular Biology

As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?

TLS Online TPP Program

#Question id: 3688

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following enzyme has a unique ability to introduce positive and negative supercoiling of the DNA and it is the target for antibacterial agents such as ciprofloxacin/quinolones?

TLS Online TPP Program

#Question id: 3689

#Section 3: Genetics, Cellular and Molecular Biology

DNA replication is bidirectional and anti-parallel. Which of the statement is FALSE regarding the DNA replication?

TLS Online TPP Program

#Question id: 3690

#Section 3: Genetics, Cellular and Molecular Biology

The DNA polymerase is a template-directed enzyme that synthesizes new complementary strand from a parent strand but it requires the existing short nucleotide sequence for its elongation. Which of the following enzyme is required for the synthesis of this primer?