The type of movement that is specific and requires carrier molecules and energy is
A. exocytosis.
B. facilitated diffusion.
C. active transport.
D. endocytosis.
E. osmosis.
C
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In which of the following diseases does the spleen enlarge?
A. infectious mononucleosis B. malaria C. leishmaniasis D. brucellosis E. All of the choices are correct.
The H substance is needed for the proper phenotypic expression of the A, B, and AB blood types in the ABO blood typing system in humans. Individuals who are recessive for the H substance (hh) will have a type O phenotype, even if they have the A and/or B alleles. Two individuals, each with type AB blood and heterozygous at the H locus have children. What is the probability they will have a child who is phenotypically type O?
A. No chance B. 100% C. 3/16 D. 4/16 E. 6/16
Temperate bacteriophages ____
a. kill their hosts during each cycle of infection b. infect only animals c. may enter an inactive phase in which they do not kill their host d. are enveloped viruses e. infect organisms living in temperate environments
Which phrase best describes passive transport?
A.) requires transport proteins B.) requires no energy from the cell C.) requires an isotonic solution D.) requires facilitation by enzymes