Why are monosaccharides used by body cells?
A) to build membranes
B) to produce enzymes
C) for energy production
D) to store energy
C
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Enzymes function to:
A. react with other enzymes to form a product. B. catalyze chemical reactions. C. transport molecules and ions across membranes. D. regulate messages between cells.
Which type of chemical bond is responsible for stabilizing salt (NaCl)?
a. Ionic bond b. Polar covalent bond c. Hydrogen bond d. Nonpolar covalent bond
Protists are a diverse group of organisms. Which of the following is not characteristic of protists?
1.May be multicellular or unicellular. 2.May have DNA in a plasmid or in a nucleus. 3.May reproduce sexually or asexually. 4.May be autotrophs and/or heterotrophs.
The root cortex is composed mostly of collenchyma cells
____________________ Indicate whether the statement is true or false.