Flashcards in Cells Deck (32):
protects and surrounds the cell. Allows certain materials to enter and exit the cell. It is often called the gatekeeper.
Provides energy for the cell
Packages materials and secretes them to other cells.
Only in Plant cells. It is thick and rigid and made out of cellulose. It protects the plant cell.
Endoplasmic Reticulum (Rough and Smooth)
Folded membrane that transports materials around the cell. Rough ER has ribosomes.
Site of photosynthesis. Contains chlorophyll which is a green substance that converts sunlight into energy.
Stores food, water, wastes and other materials. Plant cells have a larger vacuole.
Controls all cell's activities. Contains Chromosomes with DNA
Found in the nucleus. Makes ribosome parts.
Found on the nucleus and is a protein that allows information and materials to enter and exit the nucleus.
Breaks down food and digests down wastes and worn out cell parts.
Responsible for cell division.
Not an organelle. Supports the cell and distributes food and oxygen around the cell.
Which structure is not an organelle?
Which organelle is not alive?
The movement of particles from an area of high concentration to an area of low concentration. The concentration gradient exists.
Equal amount of concentration.
Diffusion of water across a selectively permeable membrane from a area of high concentration to an area of low concentration of water molecules. The water must be distilled.
Movement of particles up the concentration gradient from an area of low concentration to an area of high concentration. Extra energy is needed (ATM).
Proteins help move large molecules across the membrane by changing shape and speeding up.
Even amount of water molecules inside and outside the cell. Plant cell: flaccid
Higher concentration of water outside the cell than inside. The water therefore flows into the cell causing it to burst. Plant cell: Turgid, Animal cell: Lysed
Higher concentration of water inside the cell than outside. The water moves out of the cell making the cell shrink. Plant cell: plasmolysed, Animal cell: shrivelled
Molecules moving into the cell.
Molecules moving out of the cell.
Liquids cannot pass the cell membrane so the membrane makes a pocket by pinching it inward.
Solids are ingested into the cell.
located in the cell's nucleus, chromosomes are a thread-like structure (star shape) made of mostly DNA
deoxyribonucleic acid: a material found in the nucleus that contains genetic information (Genes). Chromosomes are made up of DNA
a segment of DNA that controls protein production. Most genes provide instructions for making proteins. Therefore, genes control the cell’s activities by controlling when and what proteins are being made.