Exam 9: Gene Expression and Gene Regulation

Activated genes can be inactivated by reversing histone modification during a process called ____.

Of the 64 triplet combinations in the genetic code,____________________ code(s)for amino acids and ____________________ code(s)for the signal that ends protein synthesis.

Codons are ____ that encode the information for a specific amino acid in a protein.

An mRNA molecule has a cap attached to its 5' end and a poly-A tail attached to its 3' end.

If the nucleotide sequence in a DNA template strand is GGCTTAACCATT; the complementary mRNA strand will have the sequence ____________________.

Tetracyclines interfere with ____.

During processing in the nucleus,a(n)____________________ is added to the 3' end of mRNA molecules.

A protein folded into an infectious conformation that is the cause of several disorders is called a(n)____________________.

At one end of a tRNA molecule is a sequence of 3 nucleotides called an anticodon that ____.

Twenty different types of amino acids are used to make proteins.

Variant Creutzfeldt-Jakob disease is caused by errors in ____.

Most protein synthesis ____.

Transcribed DNA sequences that are removed during mRNA processing are called _____________________.

Figure -Summarize the sequence of processing,sorting,and transport of proteins synthesized in a human cell.Then indicate which cell component corresponds with each number above.

The codon encoding the amino acid methionine functions as a start codon when it occurs at the beginning of a gene.

Describe the three steps of translation.

An N-terminus is the end of a(n)____________________ that has a free amino group.

Peptide bonds form between ____.

Prions are created when normal proteins in the body ____.

Outline the four levels of protein structure that give the protein its three-dimensional shape and determine its function.