DNA structure

Base that pairs with thymine.

• guanine

• cytosine

• adenine

• phosphate

A complex molecule containing the genetic information that makes up the chromosomes.

• deoxyribose

• deoxyribonucleic acid (DNA)

• nucleotide

• gene

The sugar found in DNA.

• phosphate

• cytosine

• deoxyribose

• dextrose

When bases do not pair up correctly. It changes the genetic sequence.

• genetic mutation

• disease

• genetic error

• mutant

The base that pairs with cytosine.

• guanine

• thymine

• phosphate

• adenine

The chemicals that make up the rungs of the DNA ladder.

• deoxyribose

• phosphate

• nitrogen bases

• nucleotides

The control center of the cell, containing DNA.

• nucleus

• ribosome

• cell membrane

• nucleotide

This part of the nucleotide helps hold the DNA structure together.

• base

• deoxyribose

• guanine

• phosphate

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

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

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