#Question id: 3045
#Unit 2. Cellular Organization
Which one of the following combinations Mac-Conkey Agar allows to growth of gram negative bacteria?
(P) Bile salts (Q) Sodium chloride
(R) Methylene blue (S) Crystal violet
#Question id: 249
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 2496
#Unit 2. Cellular Organization
In the mitotic spindle, astral microtubules function to:
#Question id: 12403
#Unit 6. System Physiology – Plant
#Question id: 9592
#Unit 6. System Physiology – Plant
The function of light is to excite a specialized chlorophyll in the reaction centre either by Direct absorption or more frequently, via energy transfer from an antenna pigment, This excitation process can be envisioned as
a.) An electron from the lowest-energy filled orbital of the chlorophyll to the highest-energy unfilled orbital
b.) An electron in the upper orbital is only tightly bound to the chlorophyll and is difficult to fetch the electron nearby molecules
c.) The electron in the upper orbital is only loosely bound to the chlorophyll and is easily lost if a molecule that can accept the electron is nearby
d.) The promotion of an electron from the highest-energy filled orbital of the chlorophyll to the lowest-energy unfilled orbital
Which combination is CORRECT?