In which organelle would the defective enzyme be found?
Tay-Sachs disease is an inherited neurological disorder in which a defective enzyme prohibits the hydrolysis of phospholipids called gangliosides.
A. lysosome
B. cytoplasm
C. endoplasmic reticulum
D. Golgi apparatus
E. mitochondrion
A. lysosome
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Which of the following offers the best description of neural transmission across nearly all mammalian synaptic clefts?
A. Neural impulses involve the flow of K+ and Na+ across the cleft. B. Neural impulses travel across the gap as electrical currents. C. Neural impulses cause the release of chemicals that diffuse across the cleft. D. Neural impulses travel across the cleft in both directions. E. The calcium within the axons and dendrites of nerves adjacent to a synapse acts as the neurotransmitter.
Which of the following examples would be undergoing secondary succession? (Check all that apply.)A) An abandoned potato farmB) A coastal grassland damaged by a hurricaneC) An abandoned landfillD) Rocks in a national park covered by mosses and lichensE) A garden bed that has been weeded
What will be an ideal response?
Exergonic reactions
A. occur when there is more free energy in the products than the reactants. B. occur when there is more free energy in the reactants than the products. C. are defined as a decrease in entropy. D. are chemoorganotrophic.
If a woman is positive for a recessive X-linked trait, she must have inherited it from which of her parents?
a. both parents b. her mother c. her father d. neither parents