Which statement correctly describes nitrification?
Answer and explanation
Correct answer: A. Nitrifying bacteria convert ammonium to nitrite and then to nitrate in soil
- Step 1: Nitrification is the oxidation of ammonium by soil bacteria. Step 2. Ammonium becomes nitrite and nitrite becomes nitrate, which plants absorb. Answer: Nitrifying bacteria convert ammonium to nitrite and then to nitrate. Why not the others: Denitrification returns nitrogen gas to the air; nitrogen fixation turns the gas into ammonia.
Practise more Genetics, Molecular Biology, Physiology and Immunity.
Free questions with an explanation for every one, and full timed Wazari Exam (Iraq Baccalaureate) - Scientific Branch mock tests.
More Genetics, Molecular Biology, Physiology and Immunity questions
- Which base pairs with adenine in a DNA double helix?
- Which cell structure is the site of translation?
- A DNA template strand reads 3'-TAC-5'. What is the mRNA codon transcribed from it?
- Two heterozygous parents (Aa x Aa) have children with complete dominance. What is the expected phenotypic ratio?
- A plant with the dominant phenotype is test-crossed with a homozygous recessive plant, and about half of the offspring show the recessive tr…
- A woman who carries an X-linked recessive colour-blindness allele has children with a man with normal vision. What is expected?