What types of membrane proteins catalyze reactions in the extracellular fluid or within the cell?
a. receptor proteins
b. channel proteins
c. recognition proteins
d. enzymes
Ans: d. enzymes
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What is the relationship between the promoters for antisense RNA and the promoters of their target genes?
A) The promoters are oriented so that they transcribe opposite strands of the same segment of DNA. B) The promoters are found in different chromosomal regions but are controlled by the same sigma factors. C) The sense and antisense RNAs use the same promoter, both RNAs are produced from a single transcript that is processed. D) The sense and antisense RNAs are transcribed using the same promoter that is bidirectional.
What happens to the amount of cilia lining the inner walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone?
A) atrophies B) increases C) thickens D) no change E) decreases
Is it possible for a recombination event to turn Muller's ratchet "forward" in the popu-lation of chromosomes below? The dots on the chromosomes indicate deleterious mu-tations. Indicate the crossing-over event by a cross on the figure
What will be an ideal response?
Drug susceptibility testing
A) Determines if normal flora will be affected by antimicrobics. B) Determines the patient's response to various antimicrobics. C) Determines if the drug is increasing to toxic levels in a patient. D) Determines the pathogen's identity. E) Determines the pathogen's response to various antimicrobics.