About ________ percent of the human genome actually encodes proteins.
A) 0.5
B) 1.5
C) 5.0
D) 10
E)
100
B) 1.5
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Communication within and between cells of an embryo can include all of the following EXCEPT _____
A) increased concentration of signaling molecules B) changes in binding to regulatory sequences C) changes in gene transcription D) changes in gene sequences
A pathogenic virus has a new mutation in one of the coat proteins, that just happens to resemble the structure of a normal human protein present in glial cells of the CNS. What do you predict may be an outcome of infection by this virus?
A. The initial response to the virus will be strong, but will then be shut down by immunological tolerance. B. An autoimmune disease of the brain may develop. C. The innate immune system will ignore the pathogen, but the acquired immune system will attack it. D. The membrane attack complex will be unable to burst the viral membrane.
Which of the following is the best description of an adaptation?
a. a trait that was beneficial to survival in the past b. a trait that is currently beneficial to survival c. a trait that will be beneficial in the future d. a trait that is of no advantage to survival e. an environmental change that selects for certain traits
Three or more spindle poles present during mitosis of actively dividing cancer cells causes ________
Fill in the blank with correct word.