Which amoebozoan spends most of their life cycle as a multinucleated mass that streams along surfaces, feeding on microbes and organic matter?
a. all slime molds
b. cellular slime molds
c. plasmodial slime molds
d. amoebas
e. spore-bearing fruiting bodies
c
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DNA microarrays may be paired with chromatin immunoprecipitation (ChIP) to
A. assay the use of substrates by different enzymes. B. determine mRNA folding patterns C. identify DNA sequences bound by specific proteins D. identify protein-protein interactions.
Viruses, viroids, and prions all
A. operate intracellularly. B. may be considered acellular agents of disease. C. contain DNA. D. infect only animals. E. operate intracellularly AND may be considered acellular agents of disease.
Answer the following statements true (T) or false (F)
1. Studies by Avery, MacLeod, and McCarty with different strains of bacteria and those by Hershey and Chase with T2 bacteriophage determined that proteins are highly complex molecules that form the genetic material for bacteria and viruses. 2. A strand of DNA is composed of nucleotide bases, sulfate groups, and sugars. 3. When considering the complexity of genetic material, multiple genes are found within a chromosome. 4. If there is 28% adenine, then there must be 28% cytosine for the DNA composition of a particular organism. 5. DNA is a double helix structure whose strands are held together by hydrogen bonds with A to T and C to G base pairing.
Osmosis can be described as movement of ________
a. water across a membrane from an area of low solute concentration to an area of high solute concentration b. water from a region of high solute concentration to a region of low solute concentration c. solute from an area of low solute concentration to an area of high solute concentration d. water molecules as they collide with one another and the wall of a container