Which intermolecular force plays a pivotal role in biological molecules such as proteins and DNA ? •hydrogen bonding
•dispersion force
•dipole-dipole force
•Ion-dipole force

Can someone me with these questions plz.

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.