← Biology (0610)
Q1 / 5
Nitrogen cycle
Higher
2 marks
Why can't most organisms use nitrogen gas directly from the atmosphere?
A
N2 has a very strong triple bond; only nitrogen-fixing bacteria have enzymes to break it and convert it to usable forms
B
Nitrogen gas is toxic to all living cells
C
There is insufficient nitrogen in the atmosphere for organisms to use
D
Nitrogen gas is too large to enter cells
Need a hint?
Nitrogen cycle — Biology (0610) | Smartzi