Explore topic-wise MCQs in Biochemistry.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Which out of the following is not a neurotransmitter?

A. Noadrenaline
B. Cyclic AMP
C. Dopamine
D. Acetyl choline
Answer» C. Dopamine
Discussion
2.

Which of the following statements about action potential is false?

A. Na<sup>+</sup>/K<sup>+</sup> pumps are directly involved in creating the action potential
B. Na<sup>+</sup> and K<sup>+</sup> concentrations are not significantly changed during an action potential
C. This includes both positive and negative feedback loops
D. Only a relatively small number of Na<sup>+</sup> and K<sup>+</sup> actually diffuse across the membrane
Answer» C. This includes both positive and negative feedback loops
Discussion
3.

Diffusion of K+ out of the cell makes the inside of it less positive, or more negative and acts to restore the original resting membrane potential. This process is called ____________

A. Repolarization
B. Depolarization
C. Hyperpolarization
D. Overshoot
Answer» B. Depolarization
Discussion
4.

Depolarization and repolarization changes that occur during the action potential are produced by ____________

A. Negative feedback loops
B. Carrier mediated transport
C. Simple diffusion of ions down their concentration gradient
D. Active transport pumps along the neuron membrane
Answer» E.
Discussion
5.

Voltage regulation means ____________

A. Na<sup>+</sup>/K<sup>+</sup> pumps controls potential
B. Unless the voltage is regular gates will not respond
C. Oscilloscope only can control potential
D. With changes in the membrane potential voltage gated ion channels open and close
Answer» E.
Discussion
6.

Nicotinic acetylcholine receptor is an example of _____________

A. Ligated gated receptor channel
B. Serpentine receptors
C. Adhesion receptors
D. Receptor enzymes
Answer» B. Serpentine receptors
Discussion