ATP
Eukaryotic cells use three major processes to transform the energy held in the chemical bonds of food molecules into more readily usable forms — often energy-rich carrier molecules. Adenosine 5'-triphosphate, or ATP, is the most abundant energy carrier molecule in cells.
Answer:
D. when each chromosome is duplicated
Answer:
A
Explanation:
D) Examples of membrane proteins include ion channels, receptor proteins, and proteins that allow cells to connect to each other.
C) Almost every chemical reaction in a cell is catalyzed by a class of proteins called enzymes
B) Membrane proteins are the nanomachines that enable membranes to send and receive messages and to transport molecules into and out of cells and compartments.
A) Proteins that are anchored by dissolving in the bilayer core are said to be integral to the membrane. Lipids: Lipid-soluble substances (e.g. alcohol, chloroform) can dissolve into the bilayer and thus cross the membrane.
The nucleus during mitosis. Micrographs illustrating the progressive stages of mitosis in a plant cell. During prophase, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down. At metaphase, the condensed chromosomes