Amino acid sequences of the heme protein ____________have been studied in order to determine common ancestry.
a. cytochrome a
b. cytochrome c
c. hemoglobin
d. hemoglobin A1c
Answer: b. cytochrome c
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In determining the structure of ribozymes, why was it important that ribozyme sequences could be transcribed in vitro?
What will be an ideal response?
Growth of most Haemophilus species in culture is enhanced by:
a. incubation at 33°C to 35°C. b. high humidity. c. 5% to 10% carbon dioxide (CO2). d. enriched special media.
One possible use of transgenic plants is in the production of human proteins, such as vaccines. Which of the following is a possible hindrance that must be overcome?
A) prevention of transmission of plant allergens to the vaccine recipients B) prevention of vaccine-containing plants being consumed by insects C) use of plant cells to translate non-plant-derived mRNA D) inability of the human digestive system to accept plant-derived protein
At desmosomes, cadherin molecules are connected to ________________
(a) actin filaments. (b) intermediate filaments. (c) microtubules. (d) gap junctions.