Vitamin D is added to milk because it increases
A) calcium absorption.
B) the shelf life of milk.
C) digestion of milk protein.
D) iron absorption.
E) digestion of lipids in milk.
A
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As radiation strikes molecules in cells, it creates ____
a. charged atoms called isotopes b. charged atoms called ions c. excess storage of tRNA d. excess copies of mRNA e. excess DNA polymerase
Plasma membranes are a feature of
A. all cells. B. prokaryotic cells only. C. eukaryotic cells only. D. plant cells only. E. animal cells only.
Eukaryotic and prokaryotic organisms differ in how they process genetic information. Which statements best explain one of these differences?
A. In prokaryotes, genes are transcribed directly into polypeptides. In eukaryotes, genes are transcribed into RNA which is used to assemble polypeptides. B. In prokaryotes, translation occurs before genes are transcribed into mRNA. In eukaryotes, genes are transcribed into mRNA which is then translated into polypeptides. C. In prokaryotes, translation of the mRNA begins before transcription is complete. In eukaryotes, transcription and modification of the mRNA is completed before translation begins. D. In prokaryotes, introns are removed before genes are transcribed into mRNA. In eukaryotes, introns are removed after genes are transcribed into mRNA.
Which chemical, produced by S. aureus, digests blood clots?
A. coagulase B. penicillinase C. staphylokinase D. hyaluronidase E. toxic shock syndrome toxin