TLS Online TPP Program

#Question id: 4336


Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E. coli cell?

#Unit 3. Fundamental Processes
  1. continuous transcription of the structural gene controlled by that regulator

  2. complete inhibition of transcription of the structural gene controlled by that regulator

  3. irreversible binding of the repressor to the operator

  4. continuous translation of the mRNA because of alteration of its structure

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TLS Online TPP Program

#Question id: 453

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement does not explain why many biochemical processes are carried out via multi-step pathways rather than by single-step reactions (or only a few steps)

TLS Online TPP Program

#Question id: 454

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement is false about most metabolic pathways?

TLS Online TPP Program

#Question id: 455

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct for a step in a reaction pathway to serve as a control point

A) irreversible  B) endergonic  C) far from equilibrium

TLS Online TPP Program

#Question id: 456

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following function is done by compartmentation of enzymes?

A) helps loss by diffusion.

B) keeps separate pools of metabolites in cells.

C) can help control metabolic pathways.

TLS Online TPP Program

#Question id: 457

#Unit 1. Molecules and their Interaction Relevant to Biology

Which are membrane associated pathways?

A) electron transport chain in eukaryotes

B) citric acid cycle in bacteria

C) photosynthesis

D) glycolysis

TLS Online TPP Program

#Question id: 458

#Unit 1. Molecules and their Interaction Relevant to Biology

Ten people are sitting in a row. Their objective is to whisper a secret from one person to the next all the way down the row. The first person whispers the secret to the second person who passes the secret to the third person and so on. After whispering to the third person, the second person in the row notices the ninth person has fallen asleep in their chair, so she gets up, goes down the row and shakes person nine awake. This example is similar to ________.