Aphotosystem is:
a: a collection of hydrogen-pumping proteins
b: a collection of photosynthentic pigments arranged in a thylakoid membrane
c: a collection of photosynthetic protons arranged in a thylakoid membrane
d: found only in prokaryotic organisms

What food can provide the body with a quick source of the energy needed to carry out cell functions (a) whole grain bread (b) ground hamburger (c) vegetable oil (d) whole milk

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.