In bacteria, there are 61 mRNA codons that specify an amino acid, but only 45 tRNAs. Which of the following statements explains this fact?

#Question id: 26942

#Unit 10. Ecological Principles

#Question id: 4541

#Unit 3. Fundamental Processes

Mig1 recruits a “repressing complex” containing the Tup1 protein. This complex is recruited by many yeast DNA-binding proteins that repress transcription, including the alpha2 protein involved in controlling the mating-type specific. Tup1 also has counterparts in mammalian cells, choose correct mechanisms have been proposed to explain the repressing effect of Tup1.

I-Tup1 acts on nucleosomes either through recruiting histone deacetylases and/or by positioning a nucleosome at or near the transcription start site.

II-Tup1 interacts directly with the transcriptional machinery at the promoter and inhibits initiation.

#Question id: 2673

#Unit 2. Cellular Organization

For a repressible operon to be transcribed, which of the following must be true?

#Question id: 28318

#Unit 5. Developmental Biology

In case of mammalian fertilization, mutations in either Juno or Izumo that leads to___

#Question id: 11860

#General Aptitude