To test for the presence of starch, iodine can be used. A positive reaction results in a black color. A dialysis bag filled with starch solution and secured on both ends is placed in iodine solution. After 30 minutes the dialysis bag appears black. Based on this information, what most accurately describes what happened?
A. Due to its size and polarity, iodine was able to enter the dialysis bag and interact with starch.
B. Over time, both iodine and starch are equally distributed throughout the two solutions.
C. Due to its size and polarity, starch was able to exit the dialysis bag and interact with the iodine solution.
Answer: A
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A. cytoplasm. B. outer mitochondrial membrane. C. inner mitochondrial membrane. D. intermembrane space of mitochondria. E. mitochondrial matrix.
The mutations found in the CF gene that result in cystic fibrosis are recessive because
A) the protein produced by the normal allele is sufficient for normal cellular function. B) the CF mutations always result in no protein being produced. C) CF mutations result in a protein that has normal function only if normal CF protein also exists in the cell. D) dominant alleles that cause a fatal disorder, such as cystic fibrosis, cannot be inherited.
Allopolyploidy is a significant factor in the evolution of:
a. bacteria. b. animals. c. protozoa. d. fungi. e. flowering plants.
The Apicomplexa are named for their apical complexes which allow them to
A) be motile by means of multiple flagella. B) penetrate the cytoplasmic membranes of host cells. C) undergo schizogony. D) carry out photosynthesis. E) attach to surfaces.