Which of the following neuron structures coats the elongated axons of motor neurons?

a) axon hillock
b) dendrite
c) neuron cell body
d) myelin sheath
e) nucleus


Answer: d) myelin sheath

Biology & Microbiology

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What type of test affixes an antigen to an inert particle such as a latex bead?

A. Cross-reactions B. Agglutination C. Precipitation D. Specificity E. Sensitivity

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Animals capable of producing their own body heat by way of metabolism and of retaining it are said to be:

A. metabolic B. thermogenic C. thermodynamic D. endothermic E. All of the choices provided are correct

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Contact with a minute quantity of blood is sufficient for infection with hepatitis B virus

Indicate whether the statement is true or false

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The relationship among a gene, a messenger RNA, and a protein is that ________

A) genes make mRNA, which then make proteins B) genes make proteins, which then make mRNA C) mRNAs make proteins, which then make genes D) proteins make mRNA, which then make genes E) mRNAs make genes, which then make proteins

Biology & Microbiology