DNA Structure and Replication
This scientist took the famous Photo-51, which provided evidence that DNA is a double-helix structure.
Rosalind Franklin
The sequence that signals the end of transcription is called this.
Terminator
A point mutation that results in a premature stop codon is known as this type of mutation.
Nonsense
This portion of a chromosome contains Okazaki fragments.
Lagging Strand
DNA is composed of two strands twisted into a helix, where adenine pairs with this base.
Thymine
The first amino acid added to a polypeptide chain during translation is usually this.
Met
The Pitx1 gene contains multiple regulatory switches. This allows for tissue-specific expression through the binding of these proteins.
Activator Proteins
Introns are sections of DNA that are not translated. Instead, they are known as this type of sequence.
untranslated or noncoding
If DNA of a particular species contains 22% adenine, what is the percentage of cytosine?
28%
Given the DNA sequence 3’-TACCGGCCAATAATTCGT-5’, provide the corresponding mRNA sequence.
5’-AUGGCCGGUUAUUAA-GCA-3
When lactose is not being utilized, this protein binds to the lac operon to prevent transcription.
Repressor Protein
This enzyme unzips DNA at the replication fork.
DNA helicase
This enzyme joins Okazaki fragments together during DNA replication.
DNA ligase
How many nucleotide bases are in 12 mRNA codons?
36
This type of mutation does not change the amino acid sequence of a polypeptide.
Silent
Given the mRNA sequence 5'-AUG GCU UAC GGA UAA-3', determine the corresponding amino acid sequence.
Met-Ala-Tyr-Gly-Stop
The strand that is synthesized discontinuously during DNA replication is called this.
Lagging strand
This type of RNA carries amino acids to the ribosome during translation.
tRNA
In Arctic foxes, seasonal coat color changes are most likely controlled by changes in this process.
Gene Expression
When DNA replicates, each original strand serves as a template for a new complementary strand. This process is called this.
Semiconservative replication