protons

Stroma

... harnessed by the cytochrome b6/f complex to pump protons (H+) against their concentration gradient from the stroma of the chloroplast into the ... Full article >>> The fluid-filled space surrounding the grana is the stroma . Many enzymes needed in photosynthesis are found embed...

Protozoa

...d slime molds . protocells : the first cells . protons : positively charged particles within the nucleus of an atom . Full article >>> Freshwater organ isms live in a hypotonic solution and have a tendency to gain water. The contractile vacuole in freshwater protozoa ns removes wate...

Protons

...The number of electrons is equal to the number of protons . Full article >>> protons : positively charged particles within the nucleus of an atom . pulmonary artery : the artery of ...

Proton pump

...gral membrane protein that is capable of moving protons across the membrane of a cell , mitochondrion ,...ctions of photosynthesis , drives the pump. As protons (H+) are pumped out of the cell , its interior becomes increasingly negative. Full article >&...

Protocells

protocells : the first cells . protons : positively charged particles within the nucleus of an atom . pulmonary artery : the artery of the human circulatory system that pumps the blood from the right ventricle to the lungs for gas exchange. Full article >>> From...

Protista

...d slime molds . protocells : the first cells . protons : positively charged particles within the nucleus of an atom . Full article >>> Protista The kingdom whose members are character ized by being eukaryotic and unicellular or colon ial. proto-oncogene . See oncogene . proto ...

Protist

...d slime molds . protocells : the first cells . protons : positively charged particles within the nucleus of an atom . Full article >>> protist A member of the kingdom Protist a , generally considered to include the protozoa and eukaryotic algae . Protist a The kingdom whos...

Oxygen

...e negatively charged oxygen molecule s take up protons from the medium and form water (2H+ + 2e- + 1/2 O...cle >>> Oxygen element with eight protons (oxy = sharp acid; gen = bear produce) P PalearcticRealm the biogeographical realm including Euro...

Nucleus

...he center portion of an atom which contains the protons and neutrons. Full article >>> Def... kernel] (1) An atom 's central core, containing protons and neutrons. (2) The chromosome -containing organelle of a eukaryotic cell . (3) A cluster of ...

Nucleon

...ucleon The nucleus of an atom is built up of protons and neutrons, collectively called a nucleon . nucleoplasm Protoplasm of nucleus , as distinguished from cytoplasm . Full article >>> "for his pioneering studies of electron scattering in atomic nuclei and for his thereby achieved d...

Masseter

...seter A chewer. mass number Sum of the number of protons and neutrons in the nucleus of an atom ; designated by a superscript to the upper left of the elemental symbol. Full article >>> The Straight Dope ( Masseter "strongest;" 975 pounds for 2 seconds; gluteus maximus and quadriceps st...

Intermembrane space

...rgy released by this trans fer to the pumping of protons (H+) from the matrix to the intermembrane space . Full article >>> As a result of the electron trans port system, hydrogen ions become concentrated in the intermembrane space . These concentrated ions contain energy much like a dam...

Eukaryotes

...he center portion of an atom which contains the protons and neutrons. Full article >>> Kingdom Plantae group of multicellular eukaryotes most of which have chlorophyll and do photosynthesis to make their own food ( plant a = plant ; probably from plant are = to level the groun...

DNA probes

... forms of an element that have the same number of protons (atomic number) but differing numbers of neutrons (mass numbers). Radioactive isotopes are commonly used to make DNA probes and metabolic tracers. J ... Full article >>> A more recent development is direct detection of viral protei...

Chemiosmosis

...the energy given off by electrons is used to pump protons across a membrane and synthesize ATP . chemoreceptors : the specialized receptor cells that trans mit smell and taste. Full article >>> chemiosmosis (kee-mee-os-moh-sis) The production of ATP using the energy of hydrogen-io...

Cervix

...the energy given off by electrons is used to pump protons across a membrane and synthesize ATP . Full article >>> Cervix the neck or a neck-like portion on another body organ such as the bottom narrowed end of the uterus ( cervix = neck) Chernozem rich black topsoil with a lower lay...

Bases

Bases are substances that accept protons from acids . Let's look at an example. Full article >>> Other bases in addition to the normal adenine ; cytosine ; guanine ; and uracil . Found primarily in t RNA s and produced by post transcription modification of one of ...

ATP

...DP to form ATP using energy from the passage of protons through the enzyme . Atria Chambers of the heart . Full article >>> ( ATP ) The major source of usable energy in cell metabolism ; composed of adenine , ribose, and three phosphate group s. On hydrolysis , ATP loses one phosph...

Atom

...ndependent existence. atomic number The number of protons in the nucleus of an atom . Full article >...st complete unit of the elements , consisting of protons , neutrons, and electrons. atomic mass A mass unit determined by arbitrarily assigning the carbon-12...

Anabolism

... s. amphiprotic Capable of donating and accepting protons , thus able to serve as an acid or a base . Full article >>> The organ ism's metabolism can be dichotomized into the synthesis of organ ic molecule s ( anabolism ) and their breakdown ( catabolism ). Full article >>>...

Acids

...s and Bases Acids are substances that donate protons (hydrogen ions, H+) to bases . Bases are substances that accept protons from acids . Full article >>> amino acids Organ ic acids containing an amino...