The Movement of Substances from Lower to Higher Concentration Across

question 50

Multiple Choice

The movement of substances from lower to higher concentration across a semipermeable membrane via a specific protein carrier and cell expenditure of energy is called ______.

• A)osmosis
• B)diffusion
• C)active transport
• D)endocytosis
• E)facilitated diffusion

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Definitions:

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in growth, development, functioning, and reproduction.

Ribosomes

Molecular machines within cells that synthesize proteins by translating the genetic information encoded in mRNA.

Nucleotides

Organic molecules that serve as the building blocks of nucleic acids like DNA and RNA, composed of a sugar, a phosphate group, and a nitrogenous base.

Nucleic Acids

Biopolymers essential to all known forms of life, which carry genetic information in cells, primarily in the form of DNA and RNA.