What is DNA?

DNA is a molecule stored in the nucleus of cells, packaged in chromosomes. It is responsible for the diversity among living organisms by determining physical traits and personality. DNA instructs cells to produce specific proteins and can replicate itself, ensuring identical copies are passed during cell division. Its unique double helix structure allows for these functions. DNA consists of four bases: adenine, thymine, cytosine, and guanine, which pair specifically (A with T, C with G) to maintain the sequence during replication. This sequence is crucial for passing genetic information. DNA serves as a blueprint for protein construction, making each organism unique.

What is the primary role of DNA in living organisms?

• To transport nutrients

• To store energy

• To instruct cells to make proteins

• To provide structural support

Which of the following is NOT a base found in DNA?

• Guanine

• Uracil

• Thymine

• Adenine

How do the bases in DNA pair up?

• A with G, T with C

• A with T, C with G

• A with T, G with C

• A with C, T with G

What ensures that the unique sequence of DNA is passed on during cell division?

• The pairing of A with C and T with G

• The pairing of A with T and C with G

• The pairing of A with T and G with C

• The pairing of A with G and T with C

What is the significance of DNA in protein construction?

• It contains the blueprints for constructing proteins

• It acts as a catalyst in protein synthesis

• It provides the energy needed for protein synthesis

• It transports proteins to different parts of the cell