Topic 2 Lesson 3

Multiple Select

Which of the following are nitrogen bases found in DNA?

• Adenine and Thymine

• Cytosine and Guanine

• Uracil and Adenine

• Thymine and Uracil

Fill in the Blank

Cells need to replicate or make copies of ___ to build and repair structures or to replace cells that have died.

Multiple Choice

What is the main purpose of DNA replication in cells?

• To produce energy for the cell

• To ensure each new cell has identical genetic information

• To break down proteins

• To remove waste from the cell