Duchenne muscular dystrophy
a. is an X-linked recessive disorder.
b. affects about one in 3,500 boys.
c. inevitably results in death by age 25.
d. results from an abnormal structural protein in
muscle cells.
e. fits all of these descriptions.
Answer: e
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In a phylogenetic tree, positions indicating a common ancestor are referred to as:
A. branches B. nodes C. trunks D. roots E. limbs
Reciprocal translocations can affect gene dosage because:
A. the genes involved in the translocation are nonfunctional. B. the two chromosomes involved in the translocation may not assort together during meiosis. C. the two chromosomes involved in the translocation always assort together during meiosis. D. reciprocal translocation involves the duplication of one set of genes and the deletion of another set of genes. E. none of these
Glycolysis starts and ends in the _____
a. nucleus c. plasma membrane b. mitochondrion d. cytoplasm
The majority of carbon dioxide is carried as:
a. CO2 bound to red blood cells b. Bicarbonate ion in the plasma c. Hydrogen ion bound to red blood cells d. Water in the plasma