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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
pelvic girdle
Glossaries - Biology glossary

bones that transmit the force generated by the lower limbs to the axial skeleton

penis
Glossaries - Biology glossary

male reproductive structure for urine elimination and copulation

pepsin
Glossaries - Biology glossary

enzyme found in the stomach whose main role is protein digestion

pepsinogen
Glossaries - Biology glossary

inactive form of pepsin

peptide bond
Glossaries - Biology glossary

bond formed between two amino acids by a dehydration reaction.

peptide hormone
Glossaries - Biology glossary

hormone composed of a polypeptide chain

peptide hormone
Glossaries - Biology glossary

hormone composed of a polypeptide chain

peptidoglycan
Glossaries - Biology glossary

material composed of polysaccharide chains cross-linked to unusual peptides

peptidyl transferase
Glossaries - Biology glossary

RNA-based enzyme that is integrated into the 50S ribosomal subunit and catalyzes the formation of peptide bonds

perception
Glossaries - Biology glossary

individual interpretation of a sensation; a brain function

perforin
Glossaries - Biology glossary

destructive protein that creates a pore in the target cell; used by NK cells and killer T cells

perianth
Glossaries - Biology glossary

part of the plant consisting of the calyx (sepals) and corolla (petals)

perianth
Glossaries - Biology glossary

(also, petal or sepal) part of the flower consisting of the calyx and/or corolla; forms the outer envelope of the flower

pericardium
Glossaries - Biology glossary

membrane layer protecting the heart; also part of the epicardium

pericarp
Glossaries - Biology glossary

collective term describing the exocarp, mesocarp, and endocarp; the structure that encloses the seed and is a part of the fruit