DNA, Genes and Chromosomes

How many chromosomes are found in each cell of your body (excluding sex cells like sperm and egg)?

• 46

• 23

• 40

• 45

The number of chromsomes depends on the type of organism.

• true

• false

What is the shape of DNA?

• Triple Helix

• Spiral

• Twisted

• Double Helix

The nitrogen base Thymine pairs with....

• Guanine

• Cytosine

• Adenine

• Uracil

The backbone of DNA is made up of two things....

• A sugar and Uracil

• A sugar and Phosphate

• A sugar and Adenine

• A sugar and water

Cytosine pairs with________

• Adenine

• Guanine

• Thymine

• Deoxyribose

A ______________ is a segment of DNA that codes for a specific trait.

• Chromosome

• Nucleotide

• Gene

• Phosphate

A change in DNA is called

• radiation

• chemolysis

• mutation

• karyotype

X outlines a(n) ___________.

• amino acid
• nitrogen base 
• nucleotide
• nitrogen base pair

Which sequence of complementary DNA bases would pair with this partial strand
ATG TGA CAG?

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG