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TLS Online TPP Program

#Question id: 33153

Activation of APC/C depends primarily on association with one of two activating subunits (Cdc20 or Cdh1), because:

#Unit 2. Cellular Organization
  1. Their binding causes a conformational change that inhibit enzyme activity
  2. They provide the main binding site for the enzyme’s protein substrates
  3. They interact with short amino acid sequences on APC/C substrates, holding them in place while the APC/C builds degradation box on the target
  4. They provide help in the recognition of phosphorylated substrates
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TLS Online TPP Program

#Question id: 15602

#Unit 12. Applied Biology

The antibiotic erythromycin, the immunosuppressive drug FK506, and the cholesterol-lowering drug lovastatin all belong to which class.
TLS Online TPP Program

#Question id: 28664

#Unit 2. Cellular Organization

DNA-bound G1 cohesins Convert into cohesive complexes by cohesin acetyl transferases (CoATs), that are involve to acetylation, which acetylate__
TLS Online TPP Program

#Question id: 4413

#Unit 3. Fundamental Processes

Which of the following is true about TFIID?
TLS Online TPP Program

#Question id: 885

#Unit 1. Molecules and their Interaction Relevant to Biology

The half-lives of many cytoplasmic proteins vary with the identities of their N-terminal residues via the  N-end rule.

a) Proteins with the “destabilizing” N-terminal residues contain Asp, Arg, Leu, Lys, and Phe with their half-lives > 2 to 3 hours

b) Proteins with the “destabilizing” N-terminal residues with their half-lives of only 2 to 3 minutes contain; Asp, Arg, Leu, Lys, and Phe

c) Proteins contain Ala, Gly, Met, Ser, Thr, and Val have half-lives of >10 hours are stabilizing N-terminal residue in prokaryotes

d) Those with the “stabilizing” N-terminal residues Ala, Gly, Met, Ser, Thr, and Val have half-lives of >20 hours in eukaryotes

Which of the following is correct?
TLS Online TPP Program

#Question id: 12180

#Unit 2. Cellular Organization

Following statements are regarding to cotransport.
A. The two forces constituting the electrochemical gradient—the membrane electric potential and the ion concentration gradient—may act in the same or opposite directions.
B. Cotransporters use the energy released by movement of an ion (usually H+ or Na+) down its electrochemical gradient to power the import or export of a small molecule or different ion against its concentration gradient.
C. Cotransporters use the energy released by movement of an ion (usually H+ or Na+) down its electrochemical gradient to power the import or export of a small molecule or different ion down its concentration gradient.
D. The cells lining the small intestine and kidney tubules contain symporters that couple the energetically favorable entry of Na+ to the import of glucose against its concentration gradient.
Which of the following is incorrect?