Can someone me with does 4 questions biology high school

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

You see a white marker with an orange circle and black lettering. what does this marker tell you