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Cells
NCEA Level 2
29
Biology
10th Grade
07/22/2014

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Term
Cell
Definition
Building block of living things
Term
Isotonic
Definition
When two solutions are of equal concentration
Term
Hypertonic/concentrated solution
Definition
When a solution contains a large number of solute particles per set volume of solvent
Term
Mitochondria
Definition
The cell organelle where the process of respiration
Term
Osmosis
Definition
A type of passive transport where water molecules move from an area of high water concentration to an area of low water concentration through a cell membrane
Term
Hypotonic/dilute solution
Definition
When a solution contains fewer number of solute particles per set volume of solvent
Term
DNA
Definition
The genetic material of the cell, found in the nucleus
Term
Active transport
Definition
Transport across the cell membrane that requires energy (ATP)
Term
Nucleus
Definition
The organelle that holds the genetic material
Term
Photosynthesis
Definition
The process carried out by plant cells, which converts light energy from the sun into glucose the plant can use
Term
Chloroplast
Definition
The cell organelle where the process of photosynthesis takes place in plants
Term
Chlorophyll
Definition
The green pigment found in chloroplasts
Term
Pallisade cells
Definition
The cells at the top of a leaf that contain many chloroplasts
Term
Stoma
Definition
The openings at the bottom of the leaf that let in CO2, and let out O2
Term
Rough endoplasmic reticulum
Definition
The cell organelle responsible for the transport of proteins, rough because it contains proteins
Term
Ribosome
Definition
The cell organelle responsible for the manufacture of proteins
Term
Diffusion
Definition
The random movement of substances resulting in a movement from an area of high concentration to an area of low concentration
Term
Cell wall
Definition
The structure only found in plant cells that gives the cell its shape
Term
The respiration
Definition
The process that occurs in the mitochondria and results in the production of ATP
Term
Cytoplasm
Definition
The watery solution inside the cell in which the organelles are found
Term
Plasma membrane
Definition
The boundary between the cell and its environment
Term
Passive transport
Definition
Movement of substances, does not need energy
Term
Facilitated diffusion
Definition
Movement of substances by diffusion with 'helper' proteins that provide channels for the process
Term
DNA replication
Definition
The process of DNA making an exact copy of itself
Term
Semi-conservative
Definition
The term used to explain how each new DNA molecule contains one old and one new strand once replicated
Term
Enzyme
Definition
Proteins that speed up the rate of biological reactions
Term
Active site
Definition
The part of the enzyme that binds with the substances it works with
Term
Cristae
Definition
Folded membranes inside mitochondria. Have a large surface area, which increases the rate of respiration.
Term
Grana
Definition
Stacked membranes inside chloroplast. Have a large surface area, which increases the rate of photosynthesis.
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