What color develops when I2KI reacts with starches in a sample?
a. Blue
b. Blue-green
c. Purple
d. Red
a
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Some strategies for protecting endangered species include the use of DNA profiling to identify illegally traded animal parts and assisted reproduction techniques to help boost population numbers. These techniques are examples of _____
a. biotechnology b. gene pooling c. biosynthetics d. environmental forensics e. DNA cloning
the humoral response, some B cells differentiate into plasma cells. What do plasma cells produce in large quantities?
A. agglutinations that are specific for foreign antibodies B. interferons specific for foreign antigens C. immunoglobulins specific for foreign antigens D. antigens specific for foreign antibodies E. macrophages specific for foreign antibodies
A researcher inserted DNA fragments from an organism into expression vector plasmids and introduced the modified plasmids into bacterial cells. Which of the following methods would be an effective means of identifying which clones contain a specific gene
of interest? A) Sequence the DNA of the plasmids from each isolate. B) Prepare and analyze restriction fragments of the plasmids. C) Isolate clones that still have the vector's genetic marker. D) Assay for activity of the gene product. E) Use reverse transcriptase to prepare cDNA copies.
Alfalfa plants occur symbiotically with bacteria that can convert nitrogen gas to ammonium in a process called ________
A) nitrification B) fertilizers C) nitrogen fixation D) nitroprocessing