Biology Practice Question and Answer

Q:

Which of the following can degrade detritus into simpler inorganic substances?

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  • 1
    Algae
    Correct
    Wrong
  • 2
    Phytoplankton
    Correct
    Wrong
  • 3
    Fungal enzymes
    Correct
    Wrong
  • 4
    Lichens
    Correct
    Wrong
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Answer : 3. "Fungal enzymes"
Explanation :

1. Fungal enzymes decompose simple inorganic substances.

2. Fungi are a type of microorganisms that decompose organic matter.

3. Enzymes break down organic matter into smaller molecules, which can then be used by the body of the fungus.

Q:

Which of the following factors is responsible for the disease called 'Mad Hatter's Disease'?

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  • 1
    Inhalation of iron dust
    Correct
    Wrong
  • 2
    Inhaling silica dust
    Correct
    Wrong
  • 3
    Mercury poisoning
    Correct
    Wrong
  • 4
    Vitamin-D deficiency
    Correct
    Wrong
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Answer : 3. "Mercury poisoning"
Explanation :

1. Mercury poisoning is responsible for which of the following diseases called 'Mad Hatter's Disease'?

2. Mad Hatter's Disease is a form of mercury poisoning that affects the brain and nervous system.

3. There is a risk of mental and behavioural changes, such as confusion, hallucination, and irritability etc. in this disease.

Q:

Are carriers of infectious diseases?

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  • 1
    fly
    Correct
    Wrong
  • 2
    Dogs
    Correct
    Wrong
  • 3
    Mosquito
    Correct
    Wrong
  • 4
    None of these
    Correct
    Wrong
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Answer : 4. "None of these"

Q:

Which group of animals are named because of their spiny skin and a peculiar water-driven tube system that they use for moving around?

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  • 1
    Hemichordata 
    Correct
    Wrong
  • 2
    Aschelminthes 
    Correct
    Wrong
  • 3
    Echinodermata 
    Correct
    Wrong
  • 4
    Mollusca 
    Correct
    Wrong
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Answer : 3. "Echinodermata "
Explanation :

1. All the creatures of Echinodermata phylum are marine and have thorny bodies.

2. There is a mass flow system in their body.

3. A specific water-conveying canal system is found, which helps in their movement.

Q:

"B" represents the gene for brown coat colour and “b” represents the gene for white coat colour. In the cross BB x bb all the offsprings have a brown coat. Which genetic principle is illustrated by this cross?

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  • 1
    Multiple alleles
    Correct
    Wrong
  • 2
    Dominance
    Correct
    Wrong
  • 3
    Co-dominance
    Correct
    Wrong
  • 4
    Crossing-over
    Correct
    Wrong
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Answer : 2. "Dominance "

Q:

What is the osmolarity(in mO smolL–1) in the outer cortex and inner medullary region?

981 0

  • 1
    300 and 900 respectively
    Correct
    Wrong
  • 2
    600 and 300 respectively
    Correct
    Wrong
  • 3
    1200 and 300 respectively
    Correct
    Wrong
  • 4
    300 and 1200 respectively
    Correct
    Wrong
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Answer : 4. "300 and 1200 respectively"

Q:

Pregnant women usually become deficient in

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  • 1
    Sodium and Calcium
    Correct
    Wrong
  • 2
    Iron and Sodium
    Correct
    Wrong
  • 3
    Calcium and Iron
    Correct
    Wrong
  • 4
    Magnesium and Iron
    Correct
    Wrong
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Answer : 3. "Calcium and Iron "

Q:

A disease named tuberculoris arises?

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  • 1
    Bacteria
    Correct
    Wrong
  • 2
    Malnutrition
    Correct
    Wrong
  • 3
    Protozoa
    Correct
    Wrong
  • 4
    by virus
    Correct
    Wrong
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Answer : 1. "Bacteria"

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