The following complex of macromolecules is found in a cell: DNA attached to RNA polymerase, attached to a growing chain of RNA, attached to a ribosome, attached to two tRNAs, attached to a growing chain of amino acids. The cell must be:

#Question id: 12221

#Unit 7. System Physiology – Animal

#Question id: 258

#Unit 1. Molecules and their Interaction Relevant to Biology

#Question id: 10757

#Unit 6. System Physiology – Plant

A Negative Hydrostatic Pressure in Soil Water,

#Question id: 9591

#Unit 6. System Physiology – Plant

In light reaction, the funneling of excitation from the antenna system toward the reaction centre has been shown,

a.) The excited-state energy of pigments increases with distance from the reaction centre; that is, pigments closer to the reaction centre are lower in energy than those farther from the reaction centre

b.) The energy gradient ensures that excitation transfer toward the reaction centre is energetically favorable and that excitation transfer back out to the peripheral portions of the antenna is energetically unfavourable

c.) Some energy is lost as heat to the environment by this process, but under optimal conditions almost all the excitation energy absorbed in the antenna complexes can be delivered to the reaction centre

d.) The excited-state energy of  pigments decreases with distance from the reaction centre

Which of the following above combination is true?

#Question id: 3762

#Unit 3. Fundamental Processes

Why does a new DNA strand elongate only in the 5' to 3' direction during DNA replication?