True about G protein couple receptors is _________________ ?
Correct answer: C. G Proteins act as inhibitory and excitatory because of difference in alpha subunit
- A. G proteins bind to hormones on the cell surface
- B. All the three subunits alpha, beta and gamma should bind each other for G protein to act
- C. G Proteins act as inhibitory and excitatory because of difference in alpha subunit
- D. G protein is bound to GTP in resting stateOrder DNA Kits
Explanation
G-protein effects can be stimulatory or inhibitory largely because different alpha subunits activate or inhibit target enzymes such as adenylyl cyclase. In the resting state the alpha subunit binds GDP, and hormones bind receptors rather than the G protein itself.
Last updated
Practise Molecular Biology
38 free Molecular Biology MCQs from Biochemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biochemistry questions like this
Biochemistry is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A mutation that converts an amino acid codon to a stop codon is a_____________?
All are true of the genetic code except____________?
An enzyme that makes a double stranded DNA copy from a single stranded RNA template molecule is known as____________?
Codons are present on_____________?
Denaturation of double stranded DNA involves_______________?