Question
Explain the consequence if the oxygen availability to activated sludge flocs is reduced.

Answer

The centre of flocs will become anoxic, which would cause death of bacteria and eventually the breakage of flocs.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Name the first transgenic cow.
How do neutrophils act as a cellular barrier to pathogens in humans?
Why are the products of phenylalanine catabolism excreted in the urine in phenylketonuria?
How many nuclei are present in a fully developed male gametophyte of flowering plants?
A newly married couple does not want to produce children at least for one year and also not to use any contraceptives. Suggest a method to prevent pregnancy.
What does 'R' stand for, in the restriction endonuclease, EcoRI?
Read the following and answer any four questions from (i) to (v) given below:
Golden rice was engineered from normal rice by Potrykus and Beyer in the 1990s. The typical golden colour is due to the production of $\beta$-carotene a precursor of vitamin-A. Golden rice differs from its parental strain by the addition of three $\beta$-carotene genes. These included two genes from daffodil plant and third from a bacterium. The incorporation of these genes allows the rice plant to modify certain metabolic pathways in its cells to produce $\beta$-carotene.
  1. Due to genetic modification golden rice plants produce and store $\beta$-carotene in:
  1. Stem.
  2. Seed.
  3. Leaves.
  4. All of these.
  1. Transfer of genes to produce golden rice is achieved by:
  1. Agrobacterium.
  2. pBR322
  3. $\lambda$-phage.
  4. gene gun.
  1. In golden rice two genes were taken from:
  1. Narcissus sp.
  2. Erwinia.
  3. Coryza saliva.
  4. None of these.
  1. Golden rice is helpful to fight against disease caused by the deficiency of:
  1. Vitamin B12
  2. Vitamin C
  3. Vitamin A
  4. Vitamin D
  1. Golden rice was genetically engineered by
  1. Fire and Mello.
  2. Potrykus and Beyer.
  3. Banting and Best.
  4. Kohler and Milstein.
In your opinion, what is the most appropriate way to prevent sexually transmitted diseases? Give reasons in favor of your answer.
What is studied in genetics?
What do you understand by survival of the fittest?