DNA Basics
What is DNA
This molecule holds the genetic instructions for life.
m in mRNA stands for?
messenger
Nucleotides have how many parts?
a) 1
b) 2
c) 3
d) i wonder....
3 (ribose sugar, phosphate group and nitrogenous base)
Location of DNA
Nucleus
True or False
Nitrogenous bases of mRNA are:
Adenine (A), Guanine (G), Thymine (T), Cytosine (C)
False
Adenine (A), Guanine (G), Uracil (U) , Cytosine (C)
How many H-bonds between A and T?
2
What is Guanine?
A nitrogenous base in DNA
Does mRNA stay in nucleus?
It travels to ribosomes.
Nucleotides in DNA are more stable than in mRNA
True.
Structure of DNA
Alpha helical
does mRNA contain genes?
No! DNA does
True or False:
Cytosine bonds with Thymine with 3 H-bonds
False.
Cytosine bonds with Guanine with 3 H-bonds
DNA stands for?
Deoxyribonucleic acid
Which direction mRNA strand grows?
3' to 5' or 5' to 3'?
5' to 3'
True or False:
Four nucleotides of mRNA make a codon.
False.
Three nucleotides do