The cell type that is most directly responsible for antibody-mediated immunity against pathogens is the _______
Fill in the blank(s) with the appropriate word(s)
Answer: B cell
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Choose the item that best matches each item
A) polymerization of RNA B) 7-methyl guanosine C) transcribed gene, prior to processing D) contains information in the form of codons E) binds to Pribnow box F) directs RNA polymerase to specific promoters G) binds to promoter H) contains information in the form of anticodons I) 7-methyl adenosine J) associated with transcription termination K) autocatalytic RNA molecules 1) core RNA polymerase 2) sigma (?) subunit of RNA polymerase 3) CAP protein 4) rho (?) factor 5) hnRNA 6) tRNA 7) RNA polymerase 8) ribozymes 9) 5' mRNA cap 10) mRNA
Most soil water moves from epidermis to vascular cylinder by:
a. diffusing through root cell walls and then actively transported through cortex cells b. enter a cell wall's cytoplasm only through transport proteins in its plasma membrane c. diffusing through root cell walls d. diffusing through root cell walls and then move through plasmodesmata e. actively transported into root cells and then move through plasmodesmata
HEPA filters are used to remove microbes from
A. air. B. liquids. C. medical instruments. D. human tissues. E. All of the choices are correct.
Which of the following are potential costs of sexual reproduction?
a. Proteins in the seminal fluid of Drosophila males shorten the life expectancy of inseminated females. b. Females of birds of paradise inspect several males before making a decision of who to mate with. c. Anther smut fungus is vectored by insect pollinators. d. Male and female damselflies form characteristic mating wheels, which allow the partners to fly, albeit at slower speeds than a single damselfly. e. All of the above.