Which of the following examples below describes an autoimmune disease?

a) infection and death of t- cells by a virus, resulting in a loss of adaptive immunity.
b) release of bacterial endotoxins that block acetylcholine release result in muscle paralysis.
c) antibody binding to acetylcholine receptors of the motor end plate resulting in muscle weakness.
d) uncontrolled cell division resulting in cell surface abnormalities recognized by nk cells.

The correct answer is: C) Antibody binding to acetylcholine receptors of the motor end plate resulting in muscle weakness.

Simply saying, autoimmune diseases are diseases caused by the attack of your own cells by your immune cells. Autoimmune diseases are consequence of an abnormal immune response to a normal cell with unknown cause. In the example above, antibodies that are part of the humoral immune response attack receptors of the motor end which are normally functioning structures of the cell.

There are many types of autoimmune diseases such as rheumatoid arthritis, multiple sclerosis, lupus, diabetes mellitus type 1…

you dont brother god luck

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.