DNA Structure
What is DNA short for? pg.5
deoxyribonucleic acid
Inside a human cell, there are __ pairs of ________. pg. 14
23 pairs of chromosomes
98%
How many nucleotides does each of your cells contain? pg.9
Three billion nucleotides.
DNA is a spiral staircase structure called a ? pg.8
double helix
Chromosomes in each cell vary depending on the _____. pg.14
organism
A change in genes is called? pg. 10
Mutation
Even though they are very small, cells come in many ___ and ___? pg.6
shapes and sizes
Each DNA is made of a long chain of _____ ? pg.6
Molecules
What is it when two humans share the same DNA? pg.5
Identical Twins?
Your ____ determine your hair color, skin color, and shape of your face. pg. 12
genes
What do you need to see DNA? pg.7
a microscope
This is the name of the building blocks of DNA (it contains three molecules).
What is nucleotide?
the powerhouse that turns food into energy. pg.6
Mitochondria
DNA is arranged into ______ inside a cell's _______. pg.14
chromosomes inside a cell's nucleus.
How many new cells does your body produce everyday? pg.6
your body produces 300 billion new cells everyday.
How many bases does DNA have? pg.8
Four bases: adenine, thymine, guanine, and cytosine.
The nucleus serves as the _______ or ______ for the cell. pg.6
control center or brain
All cells contain ribosomes that make ____? pg.6
proteins
If you could stretch all your DNA, it would stretch nearly _________ kilometers. pg.6
16 billion kilometers