Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 55086
TLS Online TPP Program

#Question id: 2978

The most important regulatory control that restricts cyclins to the appropriate cell cycle stage is ubiquitin mediated, proteasome-dependent protein degradation. Which of the following statement is incorrect regarding to the degradation of protein?

#Unit 2. Cellular Organization

  1. SCF and APC/C are multisubunit ubiquitin-protein ligases that belong to the RING finger family of ubiquitin protein ligases which ensure that the cell cycle engine is driven forward and that cells cannot “go backward” in the cell cycle.

  2. SCF recognizes its substrates only when they are phosphorylated.

  3. The substrate specificity of active, dephosphorylated APC/C is determined in part by its association with one of two related substrate targeting factors called Cdc20 and Cdh1.

  4. The substrates of APC/C contain recognition motifs known as destruction box which is lysine rich.

More Questions
TLS Online TPP Program

#Question id: 11010

#Unit 7. System Physiology – Animal

Which of the following best explains how sympathetic stimulation affects the heart?
TLS Online TPP Program

#Question id: 4915

#Unit 8. Inheritance Biology

When an albino female plant of maize is crossed with normal green male plant, all plants in the progeny are albino because
TLS Online TPP Program

#Question id: 790

#Unit 1. Molecules and their Interaction Relevant to Biology

Presence of a series of 3 G-C pairs in the anticodon arm of initiator fmet tRNA is essential for
TLS Online TPP Program

#Question id: 5247

#Unit 8. Inheritance Biology

Which of the following is not a protein or group of proteins required for conjugation to occur?
TLS Online TPP Program

#Question id: 347

#Unit 1. Molecules and their Interaction Relevant to Biology

A beaker contains 100 milliliters (mL) of NaOH solution at pH = 13. A technician carefully pours into the beaker 10 mL of HCl at pH = 1. Which of the following statements correctly describes the result of this mixing?