Sterol regulatory element binding proteins (SREBPs) are involved in regulating the synthesis of ____

a. proteins
b. lipids
c. nucleic acids
d. carbohydrates
e. amino acids


ANSWER: b

Biology & Microbiology

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Answer the following statement true (T) or false (F)

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Which of the following are mechanisms to prevent polyspermy?  

_____  altering composition of exterior egg coat _____  change in membrane potential of egg _____  cortical granule enzymes remove sperm receptors from egg _____  special proteins inside the egg compare the DNA of different sperm, choosing the most adapted one _____  toxic molecules exit the egg to attack extra sperm _____  vitelline envelopes lift off surface of egg

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Which one of the following are structures in the body that are composed of two or more different tissue types joined together to perform a specific function?

A) tissues B) organs C) organ systems D) junctions E) body cavities

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A heart with three chambers, one atrium, and two ventricles is shared by _____.

A. reptiles and mammals B. reptiles and amphibians C. amphibians and mammals D. birds and mammals E. birds and reptiles

Biology & Microbiology