Cells: Basic Unit of Life Crossword Puzzle

QUESTIONS LIST:

• protoplasm : living part of plant and animal cells.
• cytoplasm : jelly-like transparent substance; between cell membrane and nucleus.
• cell membrane : outer boundary of cytoplasm; a living, selectively permeable structure.
• organelles : membrane-bound structures found in the cytoplasm; they perform specific functions.
• cell wall : rigid, outer layer of plant cells made of cellulose; it is non-living and completely permeable.
• active transport : movement of substances through a selectively permeable membrane against a concentration gradient; requires energy.
• passive transport : movement of substances through a selectively permeable membrane down a gradient; does not require energy.
• diffusion : movement of particles of a gas or a liquid, from a high- to a low concentration, down a concentration gradient, until equilibrium is reached.
• osmosis : movement of particles of a liquid(water) from a high- to a low concentration through a selectively permeable membrane.
• selectively permeable : allows certain substances to enter or leave the cell; controls movement of substances into and out of the cell.
• middle lamella : connects the cell walls of adjacent (neighbouring) plant cells to each other.
• chromatin network : during cell division it forms chromosomes, made up of genes, which carry genetic (hereditary) characteristics from parents to offspring.
• mitochondria : responsible for cellular respiration.
• ribosomes : the site of protein synthesis.