In this lesson our instructor talks about transcription and translation. First, she talks about an overview of transcription and translation, structure and types of RNA, transcription, RNA processing, and translation. Second she discusses ribosomes, steps of translation, and mutations. Four complete example videos round up this lesson.
is initiated when RNA polymerase and transcription factors bind to
the promoter region of a gene. The promoter frequently includes the
nucleotide sequence TATA and is known as a TATA box.
transcription, the pre-mRNA undergoes processing to form mRNA.
Introns are removed through splicing and a 5' cap and a poly A
tail are added to the mRNA.
mRNA is transported out of the nucleus to the cytoplasm where
translation takes place.
triplets, called codons, signify particular amino acids.
three phases of translation are also initiation, elongation and
begins at the start codon AUG, which is also the codon for
methionine. Transfer RNA (tRNA) delivers the amino acids to the
ribosome to be added to the growing polypeptide chain.
is terminated when the ribosome encounters a stop codon.
are changes in the DNA sequence. A change in a single base pair is a
point mutations. Types of mutations include silent,missense and nonsense mutations.
and deletions result in base pairs being added or eliminated from
the DNA sequence. This results in a frameshift mutation.
Transcription and Translation
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
The book and CD package include three full length practice exams that are presented with all questions answered and explained. The author also presents detailed reviews of all test topics and includes multiple-choice and free-response questions with answers at the end of each topic's chapter.
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