Activity 1.1.5 DNA Evidence

What is meant by 'Your Unique Set of Instructions' in the context of DNA?

• A set of guidelines for personal development

• A unique genetic code that determines individual traits

• A personalized instruction manual for life skills

• A specific set of rules for social behavior

How is DNA evidence prepped for analysis?

• By heating it to a high temperature

• By using a chemical solution to break down cells

• By freezing it

• By exposing it to ultraviolet light

What is thymine?

• A) A component of nucleic acids found in DNA and RNA and in the energy-carrying molecule, ATP. Adenine is a purine base.

• B) A component of the nucleic acid, DNA; a pyrimidine base.

• C) A component of nucleic acids (DNA and RNA); a purine base.

• D) A component of nucleic acids (DNA and RNA); a pyrimidine base.

What is guanine?

• A) A component of nucleic acids found in DNA and RNA and in the energy-carrying molecule, ATP. Adenine is a purine base.

• B) A component of the nucleic acid, DNA; a pyrimidine base.

• C) A component of nucleic acids (DNA and RNA); a purine base.

• D) A component of nucleic acids (DNA and RNA); a pyrimidine base.

Who were the two scientists that published a paper describing the three-dimensional structure of DNA as a double helix?

What was the contribution of Rosalind Franklin to the discovery of DNA's structure?

• She developed the double helix model.

• She provided X-ray diffraction images of DNA.

• She discovered the base pairing rules.

• She isolated DNA for the first time.

Which color represents oxygen in the DNA model activity?

• Red

• White

• Blue

• Yellow

Look at the four nucleotides (A, T, G, and C) and observe similarities and differences between them. Which of the following is a similarity between all four nucleotides?

• They all contain a phosphate group.

• They all have the same nitrogenous base.

• They all pair with the same nucleotide.

• They all have the same sugar molecule.

DNA takes the form of a double helix. It is composed of repeating: deoxyribose sugar molecules, nitrogenous bases, and phosphate groups. Match each component of DNA to its correct position (indicated by a letter) on the DNA double helix pictured here.

• position B

• nitrogenous bases

• position C

• phosphate groups

• position A

• deoxyribose sugar molecules

What is the significance of DNA structure in modern genetics?

• It determines the genetic code and hereditary information.

• It provides energy for cellular processes.

• It acts as a structural component of cells.

• It is responsible for cellular respiration.