TLS Online TPP Program

#Question id: 31376


In S. cerevisiae, DNA replication is tightly controlled, and DNA should replicate once per cell cycle. Choose the INCORRECT statement regarding why the cells do not re-replicate their DNA in the S-phase?

#Unit 2. Cellular Organization
  1. Because S phase CDKs phosphorylate several components of the MCM helicase-loading machinery.
  2. Because phosphorylation leads to export of Cdt1 from the nucleus, and degradation of Cdc6 by the SCF ubiquitin-protein ligase in yeast.
  3. Because Cdt1 which helps in the recruitment of MCM proteins in the Gl phase is inactivated by geminin in the S-phase of the cell cycle.
  4. Because MCM helicases are loaded onto DNA to form pre-RCs only when they are phosphorylated.
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TLS Online TPP Program

#Question id: 922

#Unit 1. Molecules and their Interaction Relevant to Biology

Which compound is an intermediate of the β oxidation of fatty acids?

TLS Online TPP Program

#Question id: 923

#Unit 1. Molecules and their Interaction Relevant to Biology

 The conversion of palmitoyl-CoA (16:0) to myristoyl-CoA (14:0) and 1 mol of acetyl-CoA by the B-oxidation pathway results in the net formation of:

TLS Online TPP Program

#Question id: 924

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is not true regarding the oxidation of 1 mol of palmitate (16:0) by the B-oxidation pathway?

TLS Online TPP Program

#Question id: 925

#Unit 1. Molecules and their Interaction Relevant to Biology

If an aerobic organism (e.g., the bacterium E. coli) were fed each of the following four compounds as a source of energy, the energy yield per mole from these molecules would be in the order:

TLS Online TPP Program

#Question id: 926

#Unit 1. Molecules and their Interaction Relevant to Biology

The carbon atoms from a fatty acid with an odd number of carbons will enter the citric acid cycle as acetyl-CoA and:

TLS Online TPP Program

#Question id: 927

#Unit 1. Molecules and their Interaction Relevant to Biology

In the disease sprue, vitamin B12 (cobalamin) is poorly absorbed in the intestine, resulting in B12 deficiency. If each of the following fatty acids were in the diet, for which one would the process of fatty acid oxidation be most affected in a patient with sprue?