Why is Southern blotting used?
a. to identify samples with specific DNA sequences
b. to transfer DNA samples to a special membrane or filter paper
c. to separate DNA based on size
d. to amplify a genomic region of interest
e. to prepare DNA for cloning
A
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In what types of organisms do plasmodesmata serve as a mechanism of cell-cell communication?
A. protists B. plants C. those types of organisms that spend only a portion of their life cycle in a multicellular state D. animals
True or false:
_____ The nervous systems of all animals are organized into peripheral and central components. _____ The PNS consists only of sensory neurons. _____ All neurons have either a sensory or motor function. _____ All neuronal cell bodies are either in the brain or spinal cord. _____ All nervous system responses involve input from the brain. _____ The organization of the human nervous system is completely different from that of other vertebrates. What will be an ideal response?
All the following are used to classify plankton except:
a. taxonomic groups. b. functional groups. c. life history. d. light spectrum requirements. e. size.
Which of the following events occurs in the lytic cycle of bacteriophage T4 infection but not in the lysogenic cycle?
A. attachment B. entry C. digestion of host DNA D. viral protein synthesis E. both digestion of host DNA and viral proteins synthesis