The ____ is/are responsible for closing off the airway during swallowing
a. larynx
b. epiglottis
c. pharynx
d. intercostal muscles
e. pleura
ANSWER: b
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Answer the following statement true (T) or false (F)
All genetically normal humans have
a) 44 autosomes b) 23 chromosomes c) 46 autosomes d) 8 toes e) two pairs of 22 autosomes, a Y chromosome, and an X chromosome
Each of the following statements concerning bacterial spores is correct EXCEPT:
A. They are formed by Gram-positive rods B. Their survival ability is based on their enhanced metabolic activity C. They can be killed by being heated to 121 C for 15 min D. They contain much less water than bacterial cells
Why do cancer cells induced by DNA viruses preferentially carry copies of viral "early" gene fragments more than "late" genes?
a) Early genes encourage cell cycle arrest b) Early genes integrate into the host genome whereas late genes do not c) Early genes stay silent whereas late genes are actively expressed d) Early genes are responsible for encouraging cell cycle progression into S phase