Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 25912
TLS Online TPP Program

#Question id: 314

Which statement explains the cleaning action of soap on greasy dishes?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. The soap changes the water-solubility of the grease so that it is easily dissolved by the water.

  2. The grease is trapped inside the hydrophobic interior of micelles made of soap molecules.

  3. The soap chemically breaks down the grease into smaller, more water-soluble molecules.

  4. The soap hydrates the grease with its polar head groups and holds it in suspension.

More Questions
TLS Online TPP Program

#Question id: 26469

#Unit 3. Fundamental Processes

RNA proofreading and backtrack in the prokaryotes is done by
TLS Online TPP Program

#Question id: 26468

#Unit 3. Fundamental Processes

RNA polymerase performs two proofreading functions on that growing transcript Choose the correct statement regarding the proofreading functions
a.in the pyrophosphorolytic editing catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of PPi
b.In the pyrophosphorolytic editing the polymerase backtracks by one or more nucleotides and cleaves the RNA product
c.In hydrolytic editing, the polymerase backtracks by one or more nucleotides and cleaves the RNA product
d.In hydrolytic editing, catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of Ppi
TLS Online TPP Program

#Question id: 26467

#Unit 3. Fundamental Processes

Which of the following protein reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations
TLS Online TPP Program

#Question id: 26466

#Unit 3. Fundamental Processes

Which of the following protein act as alarm and responsible for the production the “alarmone”
TLS Online TPP Program

#Question id: 26465

#Unit 3. Fundamental Processes

Breaking and remaking bonds in the process of the nucleotide addition cycle and undergoing translocation by a 
a. Necleosome paradox 
b. Parrondo’s paradox
c. Brownian ratchet 
d. C value paradox
TLS Online TPP Program

#Question id: 26464

#Unit 3. Fundamental Processes

Choose the correct statement During abortive Transcription 
a. Abortive synthesis takes before escaping the promoter (-10 to +2), entering the elongation phase 
b. Abortive synthesis produces and releases short RNA transcripts of 10 nucleotides 
c. The major phenomenon which is responsible is Brownian ratchet 
d. Three general models were associated is “Scrunching”