Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

In a $PCR$, which of the following components is not required?

  1. Nucleotide precursors
  2. A primer containing $3'-OH'$

  3. DNA helicase to separate the strands

  4. DNA polymerase to catalyse the reaction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A common laboratory technique used to make many copies (millions or billions) of a particular region of DNA is called Polymerase Chain Reaction(PCR). It requires a primer, DNA helicases, DNA polymerases, etc.,

So, the correct option is ‘ Nucleotide precursors’.

Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

Receptors associated with aortic arch and carotid artery can recognise changes in (i) and (ii) concentration and send necessary signals to (iii) for remedial actions.

  1. (i) $O _{2}$ (ii) $CO _{2}$ (iii)pneumotaxic centre
  2. (i) $CO _{2}$ (ii) $H^+$ (iii) rhythm centre
  3. (i) $CO _{2}$ (ii) $H^+$ (iii) apneustic centre
  4. (i) $O _{2}$ (ii) $H^+$ (iii)pneumotaxic centre
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Receptors associated with aortic arch and carotid artery can recognise a change in $CO _{2}$ and $H^+$ concentration and send necessary signals to the rhythm centre (medulla oblongata) that controls the rate of breathing.

So, the correct answer is (B).

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of the following microorganisms causes ringworm?

  1. Bacteria

  2. Protozoa

  3. Fungi

  4. Virus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ringworm is a skin infection which is characterized by the formation of a ring-like a pattern in the rash. It is caused by the fungal species name Tenia. The ringworm infection can occur in different parts of the body like feet, armpits, scalp, thighs, groin, etc.

Thus, the correct answer is option C. 

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of these pathogens causes ringworm and athlete's foot?

  1. Protozoa

  2. Bacteria

  3. Fungi

  4. Algae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Athlete's foot and ringworm are caused by fungus. They are collectively known as tinea. Ringworm is caused by a worm known as ringworm. It is characterised by ring-like red patches on the skin.

Athelete foot is mainly caused in between the fingers of the toes due to excessive sweating or moisture.
So, the correct answer is option C.

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

One of the common fungal disease of man is

  1. Cholera

  2. Plague

  3. Typhoid

  4. Ring worm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Ringworm is actually a skin infection caused by fungus. No worms involved. The name “ringworm” probably comes from the rash that many people see. On the skin, the rash often has a ring-shaped pattern and a raised, scaly border that snakes its way around the edge like a worm. Ringworm is common.
  • Cholera is an infectious disease that causes severe watery diarrhoea, which can lead to dehydration and even death if untreated. It is caused by eating food or drinking water contaminated with a bacterium called Vibrio cholerae.
  • Typhoid fever, also known simply as typhoid, is a bacterial infection due to a specific type of Salmonella that causes symptoms.
  • Plague is a disease that affects humans and other mammals. It is caused by the bacterium, Yersinia pestis. Humans usually get plague after being bitten by a rodent flea that is carrying the plague bacterium or by handling an animal infected with the plague.

So, the correct answer is 'Ringworm'.

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

Which of the following is a fungal disease in human?

  1. Athletes food disease

  2. Foot and mouth disease

  3. Leukoderma

  4. Proriasis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Athlete's foot is a common fungal infection of the skin, especially between the toes. Foot and mouth disease is a viral disease affecting animals. Leukoderma (vitiligo) is a pigmentation disorder, and psoriasis is an autoimmune skin condition - neither is fungal.

Multiple choice bio-chemistry immunology fungal diseases fungal, protozoan and worm diseases useful and harmful microbes

What does $Claviceps$ causes?

  1. Dandruff

  2. Blindness

  3. Ergotism

  4. Angina
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Claviceps is an ergot fungus that grows on the ears of rye and related cereal and forage plants.
Consumption of grains or seeds contaminated with the survival structure of this fungus the ergot sclerotium, can cause ergotism in humans and mammals.
So, the correct answer is 'Ergotism'