The four stages of biofilm formation are
a. attachment, colonization, development, and dispersal.
b. adherence, biosynthesis, maturation, and release.
c. attachment, biosynthesis, maturation, and dispersal.
d. adherence, infection, development, and activity.
Answer: A
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During the M checkpoint, the cell ____
a. proceeds to interphase and completes DNA replication b. proceeds to G2 phase and the cell prepares to divide c. proceeds to S phase or enters inactive G0 state d. monitors attachment of spindle fibers to chromosomes e. monitors completion of DNA synthesis and DNA damage
Round is the dominant trait for a pea; the recessive allele produces a wrinkled pea. How can you
obtain true-breeding pea plants having round peas with the least amount of work?
a. Cross plants having round peas with plants having wrinkled peas. Select round pea plants from the progeny because they are now true-breeding. b. Cross plants having round peas with other plants having round peas. Do this for multiple generations. c. Cross plants having round peas with plants having wrinkled peas. Select round pea plants from the progeny and do a test cross to determine which parental plants were homozygous dominant. Use these homozygous pea plants as your true-breeding plants. d. Cross plants having round peas with plants having wrinkled peas. This will tell you which round pea plants are homozygous dominant and are thus true-breeding. e. It's not possible. You can only get true-breeding plants that have wrinkled peas.
Before a glucose molecule can be broken down to
release energy, a. one ATP molecule must be added to glucose. b. two phosphate groups must be attached to glucose. c. three ATP molecules must be added to glucose. d. one ATP molecule must be taken away from glucose. e. it must be converted to glycogen
Why is lysogeny advantageous to a bacteriophage?
A. it speeds up the viral infection cycle. B. the genetic material of the bacteriophage is amplified many times over that seen in a lytic phage. C. it allows the bacteriophage to infect cells it would not normally infect. D. it allows the bacteriophage to destroy the host cell's DNA. E. it enables the bacteriophage to take over the cell.