What type of molecule is represented by the model below? A molecule made up of four carbon rings with other atoms bonded to those rings. Fat Carbohydrate Steroid Protein Points earned on this question: 0

Steroid

Explanation:

Steroids are molecules that usually have 17 carbon atoms distributed in four rings of carbon bonded together and linked to atoms of other elements, as shown in the aciam figure. Steroids are molecules soluble in fat and are produced synthetically for therapeutic and even aesthetic purposes, however their use must be monitored by a responsible professional.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

b

is correct hope this   also i learnd this in middle school