The genetic code is made up of codons consisting of how many nucleotides?
A. Two
B. Three
C. Five
D. Six
E. Nine
Answer: B
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IgE molecules involved in hypersensitivity reactions have become attached to
A. neutrophils. B. mast cells. C. B cells. D. macrophages. E. mast cells AND B cells.
The term genome was first used by
A) H. Winkler in 1920. B) Francis Crick in 1962. C) Francis Collins in 1992. D) J. Craig Venter in 1990.
What is alternative RNA splicing?
a. a mechanism for cleaving RNA into progressively smaller pieces for disposal b. a mechanism for patching together multiple RNA transcripts to form large and complex instructions for quaternary level proteins c. a mechanism that allows different protein products to be produced from one gene when different exons are combined to form the mRNA d. an out of control splicing mechanism only seen in cancerous cells
Certain traits will have been lost from the gene pool forever. Some traits, such as red hair or double-jointed thumbs, may be obvious. Others, such as the ability to process cholesterol or an allergy to peanuts, will be less obvious
This loss of diversity in a reduced population is called ________. A) gene flow B) genetic drift C) bottleneck effect D) founder effect