Quiz 2 Study Guide Bio 101 NVCC Annandale Exam Questions with Latest Update

An atom's nucleus is composed of: A. Protons only B. Neutrons only C. Protons and electrons D. Protons and Neutrons E. Neutrons and electrons - ANSWER-D. Protons and Neutrons The formation of ions involves the: A. sharing of electrons B. gain or loss of electrons C. gain or loss of protons D. sharing of protons E. gain or loss of neutrons - ANSWER-A. sharing of electrons Atoms or molecules that have gained or lost electrons are called: A. Acids B. Bases C. Polymers D. Ions E. Buffers - ANSWER-D. Ions Most biological molecules are joined by: A. peptide bonds B. ionic bonds C. hydrogen bonds D. disulfide bonds E. covalent bonds - ANSWER-E. covalent bonds Carbon has atomic number 6. Carbon most likely: A. shares electrons B. gains electrons C. loses electrons D. shares protons E. loses protons - ANSWER-A. shares electrons Polar covalent bonds form when: A. electrons are shared unequally between atoms. B. more than one pair of electrons is shared. C .ions are formed.