The example of agarose displayed is composed of two chains coiled around each other in a helical (spiral) fashion. Agarose molecules are generally composed of hundreds of sugar residues. Approximately how many residues are in each of the chains?
a. 2
b. 4
c. 6
d. 8
c
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The pathogen most frequently involved in causing clostridial myonecrosis is
A. Clostridium tetani. B. Streptococcus pyogenes. C. Clostridium septicum. D. Clostridium perfringens.
Due to the lack of an enzyme to break down lipids, excess accumulation of lipids in the brain leads to a human disease called Tay-Sachs syndrome. The organelle(s) most likely to lack the proper enzyme needed for lipid breakdown is/are
A. lysosomes. B. tonoplasts. C. mitochondrion. D. Golgi apparatus. E. peroxisomes.
Embryonic cell cycles allow the rapid division of cells in the early embryo. These mitotic cell cycles are much shorter in length than the mitotic cell cycles of cells in a mature organism. In the embryonic cell cycles, mitosis takes approximately the same amount of time as it does in the cell cycles of mature cells. What do you think is a result of the embryonic cycle?
A. Resulting daughter cells do not contain the same genetic information as the mother cell in the embryonic cell cycles. B. Mother cells in the embryonic cell cycle spend the majority of their time in G0. C. Resulting daughter cells cannot form a mitotic spindle in the embryonic cell cycle. D. Resulting daughter cells are smaller than the mother cell in the embryonic cell cycles.
Which of the following is NOT typically carried by the blood?
A. heat B. hormones C. proteins D. starch