TLS Online TPP Program

#Question id: 892


Assisted protein folding is mediated by a group of proteins known as chaperons, which of the following statements is incorrectly reperesents chaperon activity;

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. chaperon help to fold, unfolded and partially folded polypeptide chains to disrupt the improper association of exposed hydrophobic segments

  2. All molecular chaperones operate by binding to an unfolded or aggregated protein’s, and molecular chaperon donot requires ATP for their activity

  3. molecular chaperones function to lift folding polypeptides out of the false minima in their folding funnels

  4. molecular chaperones were first described as heat shock proteins (Hsp) because their rate of synthesis is increased at elevated temperatures

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TLS Online TPP Program

#Question id: 4360

#Unit 3. Fundamental Processes

Which of the following functions are characteristic of general transcription factors in eukaryotes?

TLS Online TPP Program

#Question id: 4361

#Unit 3. Fundamental Processes

How do steroid hormones produce their effects in cells?

TLS Online TPP Program

#Question id: 4362

#Unit 3. Fundamental Processes

How are bacteria able to change their patterns of protein synthesis so quickly in response to environmental changes?

TLS Online TPP Program

#Question id: 4363

#Unit 3. Fundamental Processes

researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. In one set of experiments, she succeeded in increasing acetylation of histone tails in the chromatin of the cells. Which of the following results would she most likely see in these cells?

TLS Online TPP Program

#Question id: 4364

#Unit 3. Fundamental Processes

A researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. One of her colleagues suggested she try increased methylation of cytosine (C) nucleotides in the DNA of promoters of a mammalian system. Which of the following results would she most likely see?

TLS Online TPP Program

#Question id: 4365

#Unit 3. Fundamental Processes

Which of the following methods is utilized by eukaryotes to control their gene expression that is different from the type of control found in bacteria?