There is great diversity of shape among microbes. Form is one of the ways different taxa can be distinguished. Which of the following shapes are not found among the microbes?
A. rods
B. spheres
C. octagons
D. curved shapes
E. spirals
C. octagons
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Which of the treatments listed below would be MOST effective for a patient with a genetic defect that causes severe combined immunodeficiency (SCID)?
A) intravenous antibiotics B) bone marrow transplant C) multiple immunizations D) repeated doses of antisera
Which of the following is NOT true concerning mitosis?
A. It insures the immortality of the genetic information possessed by an organism. B. The DNA molecule replicates before any chromosomes can be seen. C. It is the process that heals a wound. D. It accounts for most of the increase in size of growing plants and animals.
A mutation in a gene often results in a reduction of the product of that gene. The term for this type of mutation is ________
A) gain of function B) loss of function or null (in the case of complete loss) C) codominance D) multiple allelism E) incomplete dominance
Eukaryotic DNA methylation occurs on which base?
A. adenine B. thymine and adenine C. guanine D. thymine E. cytosine