What is the energy source for facilitated diffusion?

a. ATP hydrolysis
b. concentration gradients
c. glucose metabolism
d. GTP hydrolysis
e. lipid phosphorylation


ANSWER: b

Biology & Microbiology

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Cactus leaves are modified as trichomes

Indicate whether the statement is true or false.

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According to cell theory, ____

a. all organisms are multicellular b. all cells come from preexisting cells c. DNA is the structural and functional unit of life d. all cells are approximately the same size e. proteins are the genetic material of cells

Biology & Microbiology

According to the out-of-Africa hypothesis for the evolution of Homo sapiens, modern humans evolved in Africa, Asia, and Europe simultaneously.

Indicate whether the statement is true or false.

Biology & Microbiology

The BLAST program from NIH enables a researcher to look for homologous genes. It does so in general by searching for identity in what property?

What will be an ideal response?

Biology & Microbiology