The disease known as dengue hemorrhagic fever is actually
A) a hyperimmune response to reinfection with the dengue virus.
B) an immediate immune reaction to the initial infection with the dengue virus.
C) an antibody-antigen complex reaction.
D) the result of co-infection with other arboviruses.
E) the chronic carrier state of the dengue virus.
A
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Assume that production of hairs on a plant’s leaves is controlled by a single gene with two alleles, H (dominant) and h (recessive). Hairy leaves are dominant to smooth (nonhairy) leaves.
a. Name the genotype(s) of a smooth-leaved plant. b. Name the genotype(s) of a hairy-leaved plant. c. What are the possible genotypes of gametes produced by the smooth-leaved plant? d. What are the possible genotypes of gametes produced by the hairy-leaved plant? Homozygous:
Structural isomers
A. contain the same number of atoms/elements, but in different arrangements. B. are exemplified by glucose and galactose. C. are formed by different arrangements of the -COOH groups. D. may be referred to as the -D and -L forms. E. contain the same number of atoms/elements, but in different arrangements AND are exemplified by glucose and galactose.
The kinetochore serves which of the following functions?
a. Kinetochores anchor spindle fibers to the centrioles. b. Kinetochores are the site of DNA synthesis. c. Kinetochores regulate the length of the cell cycle. d. Kinetochores attach to microtubules during mitosis. e. Kinetochores are involved in cytokinesis
Different chemotherapeutic drugs can do each of the following except
A) inhibit metabolic pathways required for DNA synthesis. B) chemically cross-link DNA strands. C) inhibit DNA topoisomerases required for DNA replication. D) disrupt spindle microtubules. E) Chemotherapeutic drugs can do all of the above.