DNA Facts
Which of the following is NOT a possible base in DNA? Uracil, Cytosine, Thymine, Guanine
Uracil
Messenger
The enzyme responsible for adding nitrogen bases to a DNA strand during replication.
DNA Polymerase
This is where DNA replication occurs.
Nucleus
The two types of DNA mutations are
point and frameshift
In the double helix shape of the DNA molecule, the rungs of the ladder are made of
Nitrogen Bases
In tRNA, the "t" stands for this.
Transfer
The enzyme responsible for "unzipping" DNA to prepare for it to be copied.
Helicase
This is where transcription occurs.
Nucleus
When translation stops early because of a mutation, this is known as
Nonsense
In DNA, the base that is complementary to guanine is
Cytosine
This enzyme opens copied DNA and helps bind to the promoter to make mRNA
RNA Polymerase
Amino acid strands are connected by what type of bonds?
Peptide
This is where translation occurs.
Ribosomes
When a mutation occurs but does not affect the amino acid outcome, this is known as what kind of mutation?
Silent
What are the backbones of a double helix made of?
Phosphate and Deoxyribose Sugar
All of the following can be found in a finished mRNA strand except: introns, codons, exons, nitrogen bases
Introns
This is a set of 3 nitrogen bases on an mRNA strand.
Codon
This is where RNA polymerase binds to start transcription.
Promoter site
Insertion and deletion are examples of what type of mutation?
Frameshift
Examine this DNA strand: TAC CTG GCA. The complementary strand to this one is:
ATG GAC CGT
What are the nitrogen base pairs for mRNA?
A > U; T > A; G=C
This protein stops transcription from happening.
Repressor
Ribosomes are located here.
In the cell's cytoplasm.
Give 2 reasons gene regulation is important to organisms.
1. Helps prevent mutations
2. Helps conserve cell energy