Identify each statement as either true or false

1. the greater the mass, the greater the gravitational pull
2. gravitational pull decreases with an increase in the distance between two objects
3. if there were no gravity, planets would collide with one another
4. the momentum of moving planets does not depend on their masses
5. the sun revolves in an orbit within our galaxy

true:

false:

Which of the following statements is true regarding a basic amino acid? a.) the hydrophilic r group of a basic amino acid will be located on the interior of a protein b.) the positively charged r group of a basic amino acid could bind dna c.) the r group of a basic amino acid would only be able to form covalent bonds with other molecules d.) a basic amino acid would be considered both polar and hydrophobic e.) all of the above