The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.
A. fats
B. phospholipids
C. proteins
D. carbohydrates
Answer: B
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Muscle spindles are classified as:
a. chemoreceptors b. mechanoreceptors c. photoreceptors d. thermoreceptors e. pain receptors
The type of epithelial tissue that forms a single layer of flattened cells is
A. stratified squamous. B. simple cuboidal. C. simple columnar. D. simple squamous. E. stratified columnar.
A stretch receptor is classified as a ____
a. chemoreceptor b. mechanoreceptor c. photoreceptor d. thermoreceptor e. nociceptor
A gene that codes for a protein was removed from a eukaryotic cell and inserted into a prokaryotic cell. Although the gene was successfully transcribed and translated, it produced a different protein than it produced in the eukaryotic cell. What is the most likely explanation?
A. Unlike eukaryotes, which have three different RNA polymerases, prokaryotes have a single RNA polymerase. B. Eukaryotic transcripts have a 5' cap while prokaryotic transcripts do not. C. Eukaryotic genes often contain introns while prokaryotic genes do not. D. There are slight differences in the genetic code for prokaryotes and eukaryotes.