Fluid-filled sacs that may store amino acids, sugars, toxins, and ions in plant cells are called ____
a. plastids
b. central vacuoles
c. peroxisomes
d. vesicles
e. Golgi bodies
b
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Sulfuric acid is
A. involved in bioleaching. B. produced by unicellular sulfur-oxidizers. C. produced by Lactobacillus. D. a result of reduction of metal sulfides. E. involved in bioleaching AND produced by unicellular sulfur-oxidizers.
Would you expect the number of virions to be the same if you measured them by the plaque assay or by counting using the electron microscope? Why?
A. Yes-both methods measure the total number of virus particles in a solution. B. No-the plaque assay only measures viable virus particles, while the electron microscope cannot distinguish between defective and viable virus. C. No-you cannot count virus particles by using a plaque assay. You can only get a relative difference in quantity from one preparation of virus particles to another with this method. D. Yes-only fully functioning viruses will be released from a host cell, so the quantified number of virus particles in a plaque assay should be identical to the number of free virus particles counted by electron microscopy within a given preparation.
Answer the following statements true (T) or false (F)
1. A GMO is a transgenic organism. 2. When the genetic material of multiple organisms has been combined, it is called recombinant DNA. 3. Bacterial plasmids are small units of self-replicating DNA that can be used as cloning vectors in genetic engineering. 4. Unlike in plants, the production of transgenic animals commonly relies on viruses as cloning vectors. 5. In current biotechnology (DNA technology) advancements, scientists ensure that the methods used have no risks or unethical procedures.
Two closely related species that share a recent common ancestor are called ________ species
Fill in the blank(s) with correct word