Introduction to Cells Crossword Puzzle

QUESTIONS LIST:

• tissue : in a multi-cellular organism, a group of cells working together.
• nucleus : the cell's control center.
• ribosomes : grain-shaped organelles that produce proteins.
• electrons : some microscopes use a beam of _ instead of light.
• cytoplasm : clear, gel-like fluid that fills the region between the cell membrane and the nucleus.
• organelles : tiny cell structures that carry out specific functions within a cell.
• lipids : cell membrane consists mostly of _ .
• organs : your brain, lungs and kidneys are examples of _ .
• chloroplast : makes food for cells using energy from the sun.
• carbohydrates : sugars and starches are _ .
• membrane : the cell _ controls which substances pass into and out of a cell.
• enzymes : a group of proteins knows as _ speed up chemical reactions in living things
• osmosis : the diffusion of water molecules across a selectively permeable membrane.
• wall : a plant's cell _ helps protect and support the cell.
• active : _ transport is the movement of materials across a cell membrane using cell energy.
• mitochondria : the _ convert energy stored in food to energy the cell can use.
• system : organs working together are called an organ _ .
• diffusion : the process by which molecules move from an area of higher concentration to an area of lower concentration.
• cell : the basic unit of structure and function in living things.
• microscope : an instrument to make small objects appear larger.
• compound : two or more elements chemically combined.
• helix : the shape of dna is a double _ .
• proteins : transport _ "pick up" specific molecules and carry them across the membrane.