IndiaBIX

Biochemistry - Cell Signalling and Transduction

Exercise : Cell Signalling and Transduction - Section 1
  • Cell Signalling and Transduction - Section 1
6.
Self-phosphorylation is an excellent mechanism for triggering specific catalytic function of the proteins involved in signal cascades because it
changes the shape and thus the enzymatic activity of the proteins involved
makes the receptor more likely to capture the signaling, molecule
allows hydrophilic signaling molecules to cross the plasma membrane
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Which of the following statements about G proteins is false?
They are involved in signal cascades
They bind to and are regulated by guanine nucleotides
They become activated when bound to GDP
They must be active before the cell can make needed cAMP
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .
signaling molecule; receptor; G proteins
signaling molecule; target cell; G proteins
signaling molecule; target cell; receptors
kinase; receptor; proteases
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?
Because other body tissues use a different signaling molecule
Because nitric oxide cannot cross cell membranes and enter the blood
Because nitric oxide breaks down quickly and thus cannot travel far
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Which of the following comes under the category of cell surface receptor?
Enzyme linked receptors
Ion-channel linked receptors
G protein linked receptors
All of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers