The cell membrane A. converts glucose to other energy molecules B. controls which substances enter and exit the cell. C. alters and packages proteins and lipids. D. is the site of most cellular chemical reactions

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.