The thick filaments of a myofibril are composed of
A) myoglobin. B) sarcoplasm. C) actin. D) myosin. E) T tubules.
D
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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, starch was able to exit the dialysis bag and interact with the iodine solution. B. Due to its size and polarity, iodine was able to enter the dialysis bag and interact with starch. C. Over time, both iodine and starch are equally distributed throughout the two solutions.
To control pathogenic and disease-causing organisms, spices can be fumigated using ________.
A. ammonium gas B. chlorine gas C. heavy metals D. ethylene oxide
Specific aneuploidies are associated with various cancers. Indicate whether the statement is true or false
Which statement about biofilms is FALSE?
a. Biofilms are formed by bacteria living in a watery environment. b. Biofilms enable bacteria to attach to solid surfaces. c. Biofilm may develop on surgical implants. d. Biofilms are usually less than 2 ?m thick. e. An example of biofilm is dental plaque.