The sequence of amino acids in a protein represents its ____
a. primary structure
b. secondary structure
c. three dimensional shape
d. tertiary folding pattern
e. biological function
ANSWER: a
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You are at the aquarium looking at a freshwater mammal tank and an adult manatee swims close to the glass. On his front flippers you see fingernails. What is a likely explanation for the presence of fingernails on a manatee?
A. They are analogous to human fingernails. B. They are homologous to fish fins. C. They are a developmental homology. D. They are analogous to bear claws. E. They are vestigial structures.
The human heart
a. contracts as a result of stimuli from the sinoatrial node. b. contracts only as a result of nerve stimulation from the central nervous system. c. is activated primarily through the autonomic nervous system. d. rate is primarily under the control of the atrioventricular node. e. is independent of all nervous control.
Govingee, 35 years old, has recently become lethargic, and his face feels very cool but puffy to the touch. When you take his pulse, you note that it seems abnormally low. What condition might Govingee have?
A) low thyroid hormone B) excess calcitonin C) accumulating aldosterone D) low growth hormone
Type 1 fucosidosis is a rare human disease. Patients cannot hydrolyze the disaccharide fucose, and as a result have severe neurological decline and die by age 6. The disease is due to a defect in the gene that encodes the lysosomal enzyme that breaks down fucose (?-1-fucosidase), and is inherited in an autosomal recessive manner. Which of the following statements is accurate about Type 1 fucosidosis?
A. Ff individuals will have the disease, because anyone with the mutant allele will have the disease B. Ff and ff individuals will have the disease C. Two carriers for Type I fucosidosis have no chance of having a normal child D. Ff individuals make enough ?-1-fucosidase to break down fucose and do not exhibit the condition E. Both Ff individuals will have the disease, because anyone with the mutant allele will have the disease AND two carriers for Type I fucosidosis have no chance of having a normal child