What would result if more than one sperm fertilized an egg?
A. hermaphroditism
B. parthenogenesis
C. polyploidy
D. twins
E. haploidy
C. polyploidy
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Nematocysts are used for: a. debilitating prey
b. attaching to solid materials. c. bioluminescence. d. locomotion.
All blood cells and platelets originate from stem cells
a. true b. false
Which of the following statements about post-translational modifications is false?
A) Additional inorganic factors could be added. B) Post-translational modifications can include the addition of extra amino acids. C) Post-translational modifications are often required for a protein to function. D) Post-translational modifications provide a way for cells to regulate gene product functionality. E) Additional organic factors could be added.
Phenylketonuria is an inherited disorder. Affected individuals have a defective enzyme called phenylalanine hydroxylase. The substance that these individuals cannot break down is a(n):
A) carbohydrate. B) nucleic acid. C) protein. D) lipid. E) amino acid.