Bio Unit 8: Lesson 1 - DNA Structure

Multiple Choice

Why is DNA often compared to a twisted ladder?

• It has sugar and phosphate rungs

• The nitrogen bases form the backbone

• The sugar and phosphate form the sides, and bases are like rungs

• It contains metals like a ladder

Multiple Choice

What are the three components of a nucleotide?

• Amino acid, sugar, phosphate

• Nitrogen base, sugar, phosphate

• Ribose, deoxyribose, phosphate

• DNA, RNA, protein

Multiple Choice

Which sugar is found in DNA?

• Ribose

• Glucose

• Fructose

• Deoxyribose

Multiple Choice

Which nitrogenous base pairs with guanine in DNA?

• Adenine

• Cytosine

• Thymine

• Uracil

Multiple Choice

If a strand of DNA has the sequence ATCGTA, what is the complementary strand?

• TAGCAT

• UAGCAU

• ATCGTA

• TACGAT

Multiple Choice

A scientist is building a model of DNA. What should they use to connect the nitrogen bases across the center?

• Sugar

• Covalent bonds

• Hydrogen bonds

• Peptide bonds

Open Ended

Share something new you learned today OR something you are looking forward to learning about in this unit.