MCQ on Cell Signaling Mechanisms in Prokaryotes and Eukaryotes

Which of the following is a component of MAP kinase signal transduction pathway?

Which kinase activity is associated with the Phytochrome Photoreceptors responsible for Red /Far Red response in plants?

Fas protein involved in cell-mediated immune response ________.

Which of the following is a negative regulator of trp operon?

In a signal transduction where the trimetric G protein with α, β and γ is involved. Which subunit of the protein will activate the adenylate cyclase enzyme?

Among closely laying cells, the signals are communicated through:

Receptor-mediated endocytosis is carried out by specific proteins complex of the membrane. They are termed as:

Leukemia Inhibitory Factor (LIF) has been utilized in animal stem cell culture for:

A membrane-bound enzyme that catalyzes the formation of cAMP from ATP is:

Which of the following statement is true for the gap junctions?

The endocytic vesicles are usually coated with:

Which of the following protein is involved in apoptosis?

Calmodulin is a calcium-binding messenger protein of eukaryotic cells. A single calmodulin protein at a time can bind _______ Ca2+ ions.

The mechanism of action of diphtheria toxin is by ___________.

Three classes of genes A, B and C regulates the development of flower in Arabidopsis. If a loss‐of-function mutation occurs in the B‐type genes, what will be the composition of the floral whorls?