Answer:
a star is like the sun a burning ball of gas that gives light to the outer space.
Explanation:
It must be made of matter because anything and everything is made up of atoms. The other three options are made of atoms but they are also matter.
Answer:
False
Explanation:
The primary structure of a protein refer to the amino acid sequence. The secondary structure of a protein refer to the alpha helices, beta sheets and turns, while the tertiary structure refer to folding of the sheets due to hydrogen bonding or other bonding interaction between them.
