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Lymphatic vessels serve to absorb fat molecules from the small intestines.
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Where are villi located and what purpose do they serve?
Villi are located in the large intestine. They absorb excess water.
What molecules serve as intermediate electron carriers in the process of cellular respiration?
They can accept electrons and transfer mos of their energy to another Molecule.
The organic compounds that serve as helper molecules in many of the body's chemical reactions are called?
vitamins
What is the difference beyween photosystem 1 and photosystem 2?
The structure of photosystem I in a cyanobacterium ("blue-green alga") has been completely worked out. It probably closely resembles that of plants as well. It is a homotrimer with each subunit in the trimer containing: * 12 different protein molecules bound to * 96 molecules of chlorophyll a ** 2 molecules of the reaction center chlorophyll P700 ** 4 accessory molecules closely associated with them ** 90 molecules that serve as antenna pigments * 22 carotenoid molecules * 4 lipid molecules * 3 clusters of Fe4S4 * 2 phylloquinones Photosystem II is also a complex of * > 20 different protein molecules bound to * 50 or more chlorophyll a molecules ** 2 molecules of the reaction center chlorophyll P680 ** 2 accessory molecules close to them ** 2 molecules of pheophytin (chlorophyll without the Mg++) ** the remaining molecules of chlorophyll a serve as antenna pigments. * some half dozen carotenoid molecules. These also serve as antenna pigments. * 2 molecules of plastoquinoneSource: http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/L/LightReactions.html
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
What vetebrae serve as passageways for blood vessels leading to the brain?
Transverse foramina of cervical vertebrae serve as passageways for blood vessels leading to the brain.
What are the two molecules that serve as starting materials for glucose synthesis?
Carbon dioxide and water are the two molecules that serve as starting materials for glucose synthesis.
What membrane surface molecules bind to proteins and serve as molecules identification tags?
Carbohydrates
Why are cardiac vessels necessary?
The heart, like any other organ, needs oxygenated blood. Cardiac vessels serve this purpose.
What role these molecules might serve in photosynthesis?
it is a state
Molecules which serve as chemical to make reaction work-like the breakdown of food molecules?
enzymes
What function do venous vessels serve?
to hold more blood when volume increases
What is the term for molecules which serve as chemicals to make a reaction work- like the breakdown of food molecules?
enzymes
Molecules which serve as chemicals to make reactions work?
enzymes
Can a certain key molecules can serve as regulators of metabolism?
Yes
In photosynthesis water molecules are broken down and serve as a source of?
energy
Molecules which serve as chemicals to make reactions work are called?
Reactants
