Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 4905
TLS Online TPP Program

#Question id: 5118

Which of the following is not a mechanism by which cells communicate with each other?

#Unit 5. Developmental Biology

  1. transcription factors are secreted from one cell and taken up by the target cell, where they influence gene expression

  2. cell surface molecules on adjacent cells interact and initiate a signal transduction process that influences cellular behavior and gene expression

  3. cells form gap junctions with adjacent cells, allowing the passage of small molecules

  4. cells secrete proteins and small hydrophilic molecules, which interact with cell surface receptors on target cells and initiate a signal transduction process that influences cellular behavior and gene expression

More Questions
TLS Online TPP Program

#Question id: 18385

#Unit 13. Advances in Biotechnology

Oil is a natural product, has many components and is biodegradable, the different components being degraded at different rates but still oil spills are considered as recalciterants because
TLS Online TPP Program

#Question id: 18386

#Unit 13. Advances in Biotechnology

Biomagnification occurs mainly because of the following reasons
I. compounds are taken up from the environment and accumulated in the lipid deposits of body
II. organisms are consumed by other organisms in a non- sequential manner constituting the food chain
Which of the above statements are incorrect?
TLS Online TPP Program

#Question id: 18387

#Unit 13. Advances in Biotechnology

Structural features that make these compounds resistant to microbial degradation include
1. substitution of H by other groups
2. heterocyclic compounds
3. branched linear chains
Which of the above are correct?
TLS Online TPP Program

#Question id: 18388

#Unit 13. Advances in Biotechnology

Remediation of Xenobiotics are done because they cause various hazards
TLS Online TPP Program

#Question id: 18389

#Unit 13. Advances in Biotechnology

How the degradation of alkanes and aromatic hydrocarbons generally occurs.
1. Oxygenase enzyme
2. β-oxidation to yield acetyl CoA
3. Hydrogenation reaction
4. Carboxylation
Which of the following are correct?
TLS Online TPP Program

#Question id: 18390

#Unit 13. Advances in Biotechnology

Which bacterium is mainly found at quite high ionizing radiation zones or areas?