Polar covalent bonds form when

A) more than one pair of electrons is shared.
B) an acid and a base are combined.
C) ions are formed.
D) electrons are shared unequally between atoms.
E) atoms from two molecules are repelling each other.


D

Biology & Microbiology

You might also like to view...

Which hormone increases blood-glucose levels?

a. cortisol b. glucagon c. insulin d. epinephrine

Biology & Microbiology

Which of the following is an example of a triploblast?

a. A sea anemone b. A goat c. A sponge d. A sea star

Biology & Microbiology

Rapid depolarization of a neuron generally involves a flow of ______ ions _______ a neuron.

A. potassium/into B. potassium/out of C. sodium/into D. sodium/out of

Biology & Microbiology

The human immunodeficiency virus (HIV) is so named because it cripples the immune system by attacking and destroying helper T cells (TH cells). What cell surface protein does the HIV virus most likely use to bind to and infect the TH cells?

A. CD8 B. Defensin C. CD4 D. MHC class I proteins E. Membrane-attack complex F. Mannose-binding lectin protein G. Toll-like receptor

Biology & Microbiology