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 Blanks

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