A
The nucleotide sequences that are removed during mRNA processing are called ______.
Introns
How many stop codons are there?
3
Agents in the environment that can change DNA
Mutagens
The lac operon is an example of how gene regulation occurs in ______.
Bacteria
A set of three nucleotides that is complementary to an mRNA codon
Anticodon
TRUE OR FALSE
Frederick Griffith was the microbiologist who was investigating pneumonia on mice
TRUE
How many amino acids are coded for by the strand of mRNA shown below? Assume the reading frame begins with the first nucleotide.
CGAUAC
2
The process that converts, or translates, an mRNA message into a polypeptide
Translation
A change in an organism’s DNA
Mutation
What are the nucleotides for the start codon Methionine
AUG
Where is messenger RNA "edited" into its final form?
Nucleus
Crick's central dogma of molecular biology is essentially a summary of _______, ________, and ________.
Replication, transcription, and translation
TRUE OR FALSE
mRNA forms part of ribosomes
False
The DNA double helix model used today is the product of research done by scientists _____ and _______.
Watson and Crick
Suppose you can read the sequence of bases on only one strand of the double helix. What would you use to figure out the sequence on the other strand?
Hint: its a kind of rule
Base Pairing rules
what are the 4 nucleotides in RNA
Uracil, Guanine, Adenine, Cytosine
In humans, where does DNA replication take place?
Nucleus
What are the two types of Frameshift mutations?
Insertion and Deletion
In bacteria, what binds with the repressor to activate the lac operon?
Lactose
During transcription, what does messenger RNA do?
It delivers DNA's instructions for making proteins
The main difference between the four nucleotides that make up DNA is that they have different _____.
Sugars
What is the term for the sections of messenger RNA that are spliced together during processing?
Exons
DNA segment that allows a gene to be transcribed
Promotor
When does mRNA processing take place?
After transcription
Could an environmental mutagen cause a frameshift mutation?
Yes