The ________ is the portion of the mRNA that contains the coding sequence of the gene.
Fill in the blank(s) with the appropriate word(s).
exon
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Which of the following proteins is the main component of thick filaments?
A) myosin B) sarcoplasm C) actin D) myofibril
Which of the following characterizes a weak base?
A) It binds a lot of OH- and has a strong effect on pH. B) It binds a little OH- and has a weak effect on pH. C) It lowers the pH. D) It binds a little H+ and has a weak effect on pH. E) It resists changes in OH-.
During spermatogenesis _______________________
A. the acrosome migrates towards the posterior end of the spermatid because its hydrolytic enzymes will be needed for digestion of the excessive cytoplasm around the flagella of the developing sperm B. the acrosome migrates towards the anterior end of the spermatid because its hydrolytic enzymes will be needed for penetration when the sperm contacts the egg during fertilization C. the acrosome migrates towards the anterior end of the spermatid because its pointy shape helps the sperm move more efficiently D. the acrosome migrates towards the posterior end of the spermatid because of its ability to propel the flagella moving the sperm through the female reproductive system towards the egg
After food and gastric juices combine, the gastric contents are referred to as
A) a bolus. B) secretin. C) plicae. D) chyme. E) bile.