Identify the organelle - function pairing that is INCORRECT
a. flagella - long, tail like structure used in motility of some cells
b. ribosomes - capable of producing proteins for the cell
c. plasma membrane - provides strength to plant cell walls
d. lysosomes - contain digestive enzymes that can digest molecules or cellular components
Answer: c. plasma membrane - provides strength to plant cell walls
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Which amino acid has been implicated in the formation of artery-blocking plaques?
a. isoleucine b. threonine c. homocysteine d. valine e. phenylalanine
____ have the most efficient respiratory system of all vertebrates.
Fill in the blank(s) with the appropriate word(s).
The parasite (Leishmania/Toxoplasma/Trichomonas) is an obligate parasite that is incapable of surviving long outside the human host and is transmitted almost exclusively via sexual activity.
Fill in the blank(s) with the appropriate word(s).
Mutations in the DFNA20/26 locus, which codes for the actin gamma 1 protein, are associated with congenital deafness. An irate senator complains that government money is being wasted on studies of this mutant gene-in yeast! "I am no biologist," says the senator, "but I am pretty sure yeast don't have ears." How do you respond?
A. "We can learn valuable information about the transcription of the mutant gene in yeast. It is much more difficult to study transcription in human cells." B. "We can learn valuable information about sound transmission through the mutant yeast. By placing a speaker against a yeast vial and recording sound from the other side, we can infer how the mutant actin affects sound waves." C. "We can learn valuable information about the structure of the mutant protein by expressing it in yeast. It is difficult to collect large amounts of actin from tiny hair cells, and unethical to collect it from human patients." D. "You are right, Senator -- yeast do not have ears. We should revoke the funding immediately."