Which portion of the swallowing process is voluntary?
a. movement of the tongue
b. muscle contractions that push the bolus into the pharynx
c. depression of the epiglottis
d. peristalsis of the esophagus
e. stretching of vocal cords
ANSWER: d
You might also like to view...
An mRNA sequence is 5?AUG-GGC-ACU-CAU-ACU-UAA3?, where AUG is the start codon and UAA is the stop codon. How many distinct aminoacyl-tRNA synthetases are required to translate the mRNA sequence?
A. 2 B. 3 C. 4 D. 5 E. 6
You grow a culture of bacteria and split it into two culture tubes. One sample of bacteria you treat with calcium and the other is not treated. When you transform both samples with a plasmid, only the samples treated with calcium take up the plasmid. Which of the following best explains your results?
A. DNA is degraded in the absence of calcium. B. Calcium precipitates DNA, preventing it from being taken up by cells. C. The bacteria require calcium to grow. D. The calcium makes the bacterial membrane more porous to DNA. E. The bacteria use calcium as a source of energy to take up the DNA.
Assuming no crossing over between the gene in question and the centromere, when do alleles segregate during meiosis?
What will be an ideal response?
Viruses can be used to identify bacteria because of viral specificity for a host cell. This identification method is called ________.
A. ELISA B. immunochromatography C. phage typing D. probing