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#Question id: 12186


In 2001, the Nobel Prize in Physiology or Medicine was awarded to three cell cycle scientists. Paul Nurse was recognized for his studies with the fission yeast S. pombe, in particular for the discovery and characterization of the wee1+ gene. What did the characterization of the wee1+ gene tell us about cell cycle control?

#SCPH06 I Botany
  1. The dual-specificity protein kinase Wee1 phosphorylates CDKs on the activatory tyrosine 15.
  2. Yeast cells with a defective wee1+ gene activate S phase CDKs prematurely and hence experience premature entry into DNA replication. 
  3. Fission yeast cells carrying a CDK1 mutation in which the tyrosine 15 residue is replaced by phenylalanine (which is structurally similar to tyrosine but cannot be phosphorylated) show the premature mitotic CDK activation and entry into mitosis.
  4. The dual-specificity protein phosphatase Wee1 dephosphorylates CDKs on the inhibitory tyrosine 15.

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#Question id: 4123

#SCPH01 Biochemistry

A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides.  If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about:

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#Question id: 4123

#SCPH05 I Biotechnology

A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides.  If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about:

TLS Online TPP Program

#Question id: 4123

#SCPH06 I Botany

A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides.  If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about:

TLS Online TPP Program

#Question id: 4123

#SCPH28 | Zoology

A certain bacterial mRNA is known to represent only one gene and to contain about 800 nucleotides.  If you assume that the average amino acid residue contributes 110 to the peptide molecular weight, the largest polypeptide that this mRNA could code for would have a molecular weight of about:

TLS Online TPP Program

#Question id: 4124

#SCPH01 Biochemistry

Assuming that the average amino acid residue contributes 110 to the peptide molecular weight, what will be the minimum length of the mRNA encoding a protein of molecular weight 50,000?