The central portion of nodule is pink in color due to
These are the events of Nodule formation:
a. Rhizobia get attached to epidermal and root hair.
b. Rhizobia multiply and colonise the surroundings of roots
c. Bacteria invade the root hair
d. The root hairs curl
e. An infection thread is produced
f. Bacteria are released from the thread into the cells
g. Infection thread carries the bacteria into the cortex of the root
h. The release of bacteria into cortex leads to the differentiation of specialised nitrogen fixing cells
i. Establishment of a direct vascular connection with the host for exchange
j. Nodule is formed finally
k. Initiation of nodule formation in the cortex of the root
Arrange them in order.
Which of the following does not happen during nodule formation?
Nodule formation is a result of
To produce two molecules of ammonia, how many ATP are hydrolysed?
Enzyme Nitrogenase is
To protect nitrogenase from oxygen, which of the following in nodule will act as scavenger
The nitrogen fixing bacteria are
The energy required, for the process of nitrogen metabolism comes from
Most of the plants can assimilate……a….. and ……b… and…c. is quite toxic to plants and hence cannot accumulate in them.
Find the wrong one.
1. a. Ammonia
2. c. Ammonium ions
3. c. Nitrate
4. b. Nitrite