_______ has a single ring structure and is an example of a _______

• adenine... purine

• thymine... pyrimidine

• cytosine.....purine

• guanine....pyrimidine

A nucleotide includes...?

• pentose sugar
• nitrogenous base
• phosphate group
• all of the above

Which 2 molecules forms the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

Which of the following bases is an example of a purine?

• Adenine

• Cytosine

• Uracil

• Thymine

Given the DNA strand GAATTCCTCGAG, what would be the complimentary strand to make a double stranded DNA molecule?

• GAATTCCTCGAG

• CTTAAGGAGCTC

• CAACCGGTAGA

• ACCTCGATTCATC

What is structure #3 in the diagram?

• nucleotide

• phosphate

• deoxyribose

• nitrogenous base

Tags

NGSS.HS-LS1-1

The base shown on the left side of the diagram is a _____________ and is most likely _______________.

• Purine, cytosine

• Purine, Guanine

• Pyrimidine, Thymine

• Pyrimidine, Adenine

Tags

NGSS.HS-LS1-1

If a DNA sample is determined to be composed of 30% Thymine, what is the percentage of cytosine in that same sample?

• 30%

• 60%

• 20%

• 40%

Identify what structure is outlined in the BLACK outline.

• Base pair

• deoxyribose sugar

• phosphate group

• hydrogen bonds

• Nucleotide

Identify what structure is outlined in the BLACK outline.

• Base pair

• deoxyribose sugar

• phosphate group

• hydrogen bonds

• Nucleotide