Which of the following is a disease specifically caused by an autoimmune response against acetylcholine receptors?
A) ataxia
B) myasthenia gravis
C) multiple sclerosis
D) tetanus
E) botulism
Answer: B
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Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This ratio suggests that _____
A) the parents were true-breeding for contrasting traits B) the particular trait shows incomplete dominance C) a blending of traits has occurred D) the parents were both heterozygous for the particular trait E) each offspring has the same alleles for each of two different traits
Trisomy 21 is the only autosomal trisomy that allows survival into adulthood
a. True b. False Indicate whether the statement is true or false
Fatty acids can be metabolized for energy; they enter aerobic respiration ________
a. at the electron transport step as the reduced electron carriers FADH2 and NADH b. at glycolysis, but first must be converted to glucose c. at the Krebs cycle after cleavage and conversion to acetyl-CoA d. in glycolysis after enzymatic conversion to PGAL
In general, neurons are locked into G1
a. True b. False