Who, while operating in the mid 1800's, developed antiseptic surgery which included heat-sterilization of instruments and application of phenols to wounds and dressings.
A. Alexander Fleming
B. Robert koch
C. Ignatz Semmelweis
D. Joseph Lister
E. Louis Pasteur
Ans: D. Joseph Lister
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Repeating DNA regions of at least 1000 base pairs known as ____________________ can affect gene expression
Fill in the blank(s) with correct word
Based on the function it performs, which portion of the brain is considered the most ancient from an evolutionary perspective?
1.hindbrain
2.midbrain
3.forebrain
4.none of the choices (all are similar)
The brains of Alzheimer disease patients display characteristic lesions called senile plaques formed by the accumulation of a protein fragment called amyloid beta-protein. How are the plaques believed to influence the progression of the disease?
1.Amyloid beta-protein accumulates inside cells, disrupting cell structure and function. 2.The plaques are present in brains of both normal elders and AD patients and differences between these groups in their number and rate of development are insignificant. 3.The plaques cause the degeneration and death of specific neurons, particularly in the limbic system. 4.The plaques cause the random degeneration and death of neurons throughout the brain.
A coenzyme of oxidation-reduction that becomes FADH2 as oxidation of substrates occurs in the mitochondria during cellular respiration, FAD then delivers electrons to the electron transport chain.
What will be an ideal response?