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Holt Chapter 2 Is it Alive?
Basic cell biology terms without organelles
26
Biology
7th Grade
03/28/2006

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Term
Cell
Definition
a membrane-covered structure that contains all of the materials necessary for life
Term
Stimulus
Definition
anything that affects the activity of an organism, organ, or tissue
Term
Homeostatis
Definition
the maintenance of a stable (same)internal environment
Term
Asexual
Definition
reproduction in which a single parent produces offspring that are genetically
identical to the parent
Term
Sexual Reproduction
Definition
reproduction in which two parents are required to produce offspring that
will share characteristics of both parents
Term
DNA
Definition
deoxyribonucleic acid;
hereditary material that controls all the activities of a cell, contains the
information to make new cells, and provides instructions for making proteins
Term
Heredity
Definition
the passing of traits from parents to offspring
Term
Metabolism
Definition
the combined chemical processes that occur in a cell or living organism. Two basic processes catabolism - breaking down and anabolism - building up.
Term
Producers
Definition
organisms that use sunlight directly to make sugar
Term
Consumers
Definition
organisms that eat producers or other organisms for energy
Term
Decomposers
Definition
organisms that get energy by breaking down the remains of dead organisms and
consuming or absorbing the nutrients
Term
Proteins
Definition
biochemicals that are composed of amino acids; their functions include regulating chemical
reactions, transporting and storing materials, and providing support
Term
Enzymes
Definition
proteins that make it possible for certain chemical reactions to occur quickly
Term
Carbohydrate
Definition
biochemicals composed of one or more simple sugars bonded together that are
used as a source of energy and to store energy
Term
Lipids
Definition
biochemicals that do not dissolve in water, including fats and oils; their functions include storing energy and making up cell membranes
Term
Phospholipids
Definition
molecules that form much of a cell membrane
Term
Nucleic Acids
Definition
biochemicals that store information needed to build proteins and other molecules; made up of subunits called nucleotides
Term
ATP
Definition
adenosine triphosophate; molecule that provides readily available energy for a cell’s activities
Term
Fats and oils are ________________that store energy for an organism.
(proteins or lipids)
Definition
lipids
Term
The resemblance of offspring to their parents is a result of______________. (heredity or stimuli)
Definition
heredity
Term
The heredity material in a cell called __________ (extra credit: which stands for ____________________ spelling counts)
Definition
DNA, Deoxyribonucleic Acid
Term
The function of DNA is to provide ______________________________________.
Definition
Provide instructions for the function of the cell
Term
The cell organelle which holds the hereditary information of the cell called is called the ________________.
Definition
nucleus
Term
The basic units of living things are __________________.
Definition
cells
Term
A person has about 200 different kinds of cells; each specialized to do a particular job. This means that a person is the type of organism called ___________________.
Definition
Multicellular
Term
Prokaryotes are cells that do not contain a ________________.
Definition
nucleus, because Prokaryotes do not have membrane-bound organelles.
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