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Understanding Polymers and Membranes

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Questions and Answers

What are biological polymers typically formed by?

Addition polymerization
Hydrolysis
Dehydration (correct)
Oxidation

Which of the following is a common biological polymer mentioned in the text?

Proteins (correct)
Aluminum
Silicon
Gold

What type of group is found at the hydrophilic head of membranes?

Phosphate (correct)
Alkane
Hydrophobic
Carboxylic acid

Why do simple detergents retain amphipathicity?

Fatty acids (A) Signup and view all the answers

What function do cellular membranes serve as per the text?

Compartmentalization and protection (B) Signup and view all the answers

The immiscibility of what substances gives rise to compartmentalization, protection, and energy generation in cells?

Water and lipids (C) Signup and view all the answers

What is the main factor that affects the speed of diffusion?

The distance separated by the spaces (B) Signup and view all the answers

Why do biological membranes pose a barrier to diffusion?

To maintain an imbalance in ion concentrations (D) Signup and view all the answers

What does the Nernst Equation describe?

The equilibrium between chemical and electrical forces on charged molecules (A) Signup and view all the answers

What causes a membrane voltage to occur?

Balanced immobile charges and charge transport (D) Signup and view all the answers

How can the voltage across cell membranes be measured?

With microelectrodes implanted in cells (B) Signup and view all the answers

What drives the diffusion of ions (charges) across biological membranes?

Both chemical and electrical gradients (A) Signup and view all the answers