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Chapter 13 21-40
Terms in this set (19)
Where does RNA synthesis take place in the eukaryote?
What enzyme is required for RNA transcription?
The RNA enzyme binds only to a region of DNA that have specific base sequences called ______.
What does a promoter do?
Shows RNA polymerase where to begin making RNA.
How does the DNA transcription know when to stop?
Signals DNA when a new RNA molecule is completed.
What are the steps used in RNA transcription?
RNA polymerase binds to DNA during transcription and separates the DNA strands. It then uses one strand of DNA as a template from which to assemble nucleotides into a complementary strand of RNA.
These pre-mRNA molecules have bits and pieces cut out of them before they can go into action. The portions that are cut out and discarded are called ______.
In eukaryotes, introns are taken out of pre-mRNA molecules while they are still in the ______.
The remaining pieces, known as ______, are spliced back together to form the final mRNA.
What are the two possible reasons as to why cells use energy to make a large RNA molecule and then throw parts of that molecule away?
1.) some pre-mRNA molecules may be cut and spliced in different ways and tissues, making it possible for a single gene to produce several different of RNA
2.) introns and eons may also play a role in evolution, making it possible for very small changes in DNA sequences to have dramatic effects on how genes affect cellular function
A long chain of amino acids is called a ______, also another name for a protein
How many different amino acids are there?
What are the two things that determine what kind of protein it is?
Specific amino acids in polypeptides and the order in which they are joined.
The sequence of amino acids influences the shape of the protein, which in turn determines its ______.
A language that includes four letters (A, G, C, U) and carries genetic information in living cells.
The genetic code is read ______ ______ at a time so that each word is three bases long and corresponds to a single amino acid.
Each three letter "word" in mRNA is called a ______.
______ use the sequence of codons in mRNA to assemble amino acids into polypeptide chains.
The decoding of an mRNA message into a protein is a process known as ________.
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