What molecule is NOT involved in appetite regulation?  

A.  leptin
B.  insulin
C.  ghrelin
D.  alpha-melanocyte-stimulating hormone
E.  secretin
F.  neuropeptide Y


E.  secretin

Biology & Microbiology

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A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is

A) Down syndrome. B) hemophilia. C) cystic fibrosis. D) color deficiency.

Biology & Microbiology

When salt dissolves in water as illustrated in the figure above, the water molecules form ____ around

the Na+ and Cl? ions.

a. covalent bonds b. hydration layers c. nonpolar interactions d. membranes e. ionic bonds

Biology & Microbiology

The unique attractive forces that keep molecules of water together are called:

a. strong forces. b. adhesion. c. hydrogen bonds. d. cohesion. e. weak nuclear forces.

Biology & Microbiology

Male gametophytes are produced by which of the following processes?

A. gametogenesis B. microsporophyte generation C. meiosis D. neither mitosis nor meiosis E. mitosis

Biology & Microbiology