DNA Structure & Function

What macromolecule stores our genetic code?

• ATP

• nucleotide

• DNA

• tRNA

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Why is the genetic code said to be universal between all organisms?

DNA can be made up of billions of nucleotides linked together. Nucleotides are made up of three smaller molecules covalently bonded together. The three smaller molecules are always ____, ____, and ____.

• a water

• a simple sugar

• a phosphate group

• a nitrogenous base

• an amino acid

The four nitrogenous bases in DNA nucleotides are:

• Uracil

• Adenine

• Guanine

• Cytosine

• Thymine

In DNA, Adenine is complemented by ____.

• Adenine

• Guanine

• Thymine

• Cytosine

In DNA, Cytosine is complemented by ____.

• Adenine

• Guanine

• Thymine

• Cytosine

In DNA, Guanine is complemented by ____.

• Adenine

• Guanine

• Thymine

• Cytosine

In DNA, Thymine is complemented by ____.

• Adenine

• Guanine

• Thymine

• Cytosine

Type your answer below to show the complementary strand to this DNA sequence:

GTCA

(capitalize your answer, no spaces)

What kind of bond holds the nitrogenous bases together on each side of the double helix?

• hydrogen

• ionic

• peptide

• metallic