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TLS Online TPP Program

#Question id: 4135

In the “activation” of an amino acid for protein synthesis:

#Unit 3. Fundamental Processes

  1. leucine can be attached to tRNAPhe, by the aminoacyl-tRNA synthetase specific for leucine.

  2. methionine is first formylated, then attached to a specific tRNA.

  3. the amino acid is attached to the 5' end of the tRNA through a phosphodiester bond.

  4. there is at least one specific activating enzyme and one specific tRNA for each amino acid.

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TLS Online TPP Program

#Question id: 3025

#Unit 2. Cellular Organization

Penicillin is an antibiotic that inhibits enzymes from catalyzing the synthesis of peptidoglycan, so which prokaryotes should be most vulnerable to inhibition by penicillin?
TLS Online TPP Program

#Question id: 18373

#Unit 12. Applied Biology

Scientists engineered a bacterial strain of P. fluorescens which is able to degrade 2,4-dinitrotoluene. This bacteria also helps in 
TLS Online TPP Program

#Question id: 10244

#Unit 10. Ecological Principles

Ecological niche modelling is used to predict the distributions of species. As a general rule, which of the following statements is true?
TLS Online TPP Program

#Question id: 21183

#Unit 13. Methods in Biology

This PCR have mixtures of similar oligonucleotides that are used in a PCR to amplify unknown sequences of DNA, related to a known DNA sequence is
TLS Online TPP Program

#Question id: 9597

#Unit 6. System Physiology – Plant

The reaction centre bacteriochlorophyll from purple photosynthetic bacteria was similarly identified as-