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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?

#SCPH06 I Botany

  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.

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TLS Online TPP Program

#Question id: 10238

#SCPH28 | Zoology

The diagram below shows the frequency distribution of two closely related bird species based on their resource use in sympatric. Which one of the following phenomena most appropriately explains the change in frequency distributions of species 1 and 2 in the figure given above?
TLS Online TPP Program

#Question id: 1684

#SCPH01 Biochemistry

What are the molecules mediating signal transduction following antigen binding to cell surface immunoglobulin on a B-cell called?
TLS Online TPP Program

#Question id: 7700

#SCPH06 I Botany

The legless condition that is observed in several groups of extant reptiles is the result of ________.
TLS Online TPP Program

#Question id: 633

#SCPH05 I Biotechnology

An amino acid transporter protein is responsible for the transport of a specific amino acid across a membrane. The KI values of several competitive inhibitors of the amino acid transporter are shown above. Based on these data, which of the following is most likely the amino acid transported by this protein?
TLS Online TPP Program

#Question id: 7001

#SCPH28 | Zoology

If the apical ectodermal ridge is surgically removed from an embryo, it will lose ________.