What would a fucoxanthin carotenoid stain be most useful in identifying?
A) brown or golden algae
B) flagellated algae
C) photosynthetic diatoms
D) slime molds from other molds
Answer: A
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A pupillary reflex is
(a) somatic. (b) autonomic. (c) both a and b. (d) none of the above.
In a mutant E. coli strain, there was a mutation in the malate dehydrogenase gene that resulted in a stop codon at amino acid position 14. From subcultures of this strain, a colony was obtained that was capable of making malate dehydrogenase. Your approach to examining this phenomenon should be to examine
A) the DNA sequence to see if a reversion has occurred. B) the DNA sequence to see if a suppresor mutation has occurred. C) other proteins to see if other stop codons are ignored, indicating the presence of a suppresor tRNA. D) the DNA and plasmids for the incorporation of a second complete copy of the malate dehydrogenase gene. E) all of the above
The presence of cilia is a common feature of some
a. nervous tissues. b. muscle tissues. c. connective tissues. d. epithelial tissues. e. epithelial tissues and connective tissues.
An individual with the condition of myasthenia gravis is faced with an autoimmune disorder in which the body defenses attack acetylcholine receptors on muscle cells
What would be the expected effect on calcium levels near contractile proteins, following the arrival of an electrical impulse at those neuromuscular junctions? A) a rapid decrease in concentration due to uptake by sarcoplasmic reticulum B) a rapid increase in concentration due to release by sarcoplasmic reticulum C) small or no increases in concentration due to weak responses by acetylcholine receptors D) a large decrease in concentration that occurs slowly E) a large increase in concentration that occurs slowly