DNA Structure

Why is DNA important?

• It's in everything
• it is the instructions for the cells of all living things
• it is very small and very complicated
• it provides our nourishment

Where is DNA located in plant & animal cells?

• cell membrane
• cytoplasm
• ribosome
• nucleus

The part of a nucleotide that can be different is

• the base

• the sugar

• the phosphate

In a molecule of DNA, adenine connects to...

• cytosine
• guanine
• thymine
• uracil

Which nitrogenous bases are needed to complete the DNA strand pictured below? Give your answer in order, from top to bottom.

• A. thymine, adenine, guanine, cytosine
• B. adenine, thymine, guanine, cytosine
• C. adenine, thymine, cytosine, guanine
• D. cytosine, guanine, thymine, adenine

What is the name of the sugar in DNA?

• Nucleotide
• Phosphate
• Deoxyribose
• Glucose

Identify the component #1 in the following image of a DNA molecule.

• Deoxyribose
• Phosphate
• Nitrogenous base
• Nucleotide

Identify the component #2 in the following image of a DNA molecule.

• Deoxyribose
• Phosphate
• Nitrogenous base
• Nucleotide

Identify the component #3 in the following image of a DNA molecule.

• Deoxyribose
• Phosphate
• Nitrogenous base
• Nucleotide

Identify the component #4 in the following image of a DNA molecule.

• Deoxyribose
• Phosphate
• Nitrogenous base
• Nucleotide