DNA STRUCTURE

What best describes a DNA molecule?

• Single strand

• Double helix

• Triple helix

• Circular structure

What is a gene?

• A segment of RNA that codes for a protein.

• A segment of DNA that codes for a protein.

• A type of protein that regulates gene expression.

• A cellular structure that synthesizes proteins.

What sugar is found in DNA?

• Ribose

• Glucose

• Fructose

• Deoxyribose

What is the shape of the DNA molecule?

• Linear strand

• Twisted ladder or double helix

• Circular loop

• Flat ribbon

Why is DNA important?

• It serves as the blueprint for traits of all living things.

• It helps in the digestion of food.

• It is responsible for the movement of muscles.

• It protects the body from infections.

What forms the sides (backbone) of the DNA ladder?

• Deoxyribose (sugar) and phosphate.

• Ribose and nitrogenous bases.

• Amino acids and sugars.

• Phosphate and glucose.

Who are the scientists credited with the double helix model of DNA?

• Watson and Crick

• Franklin and Wilkins

• Hershey and Chase

• Lavoisier and Dalton

What is the process of copying DNA called?

• DNA transcription

• DNA replication

• DNA translation

• DNA synthesis

What is the difference between DNA and RNA?

• DNA contains ribose sugar, while RNA contains deoxyribose sugar.

• DNA contains deoxyribose sugar, while RNA contains ribose sugar.

• DNA is single-stranded, while RNA is double-stranded.

• DNA is found in the cytoplasm, while RNA is found in the nucleus.

What is the basic unit of DNA?

• Amino Acid

• Nucleotide

• Protein

• Carbohydrate