Tag: microscopy

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Multiple choice botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

Anthocyanin occurs in

  1. Chloroplasts

  2. Vacuole

  3. Leucoplasts

  4. Chromoplasts
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The plant vacuoles consist of various water-soluble pigments such as carotenoids, anthocyanins and xanthophylls etc.
  • Anthocyanins are also water-soluble pigments which are red, purple, or blue in colour depending on the pH which gives colour to the flower and fruits (blueberry, raspberry etc).
  • So, the correct answer is 'Vacuoles'.
Multiple choice botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

A chromosome having subterminal centromere is

  1. Acrocentric

  2. Submetacentric

  3. Telocentric

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

A. An acrocentric chromosome is a  chromosome in which the centromere is located near to one end of the chromosome. 

B.  A submetacentric chromosome is a chromosome in which the centromere is located near the slightly away from the centre and the two arms are slightly unequal in length and form L-shape. 
C. A telocentric chromosome is a chromosome in which the centromere is located at the terminal end of the chromosome and their shape is similar to the letter i.
D. Metacentric chromosomes are X-shaped chromosomes and the centromere are present in the centre so that the two arms are equal.
So, the correct answer is 'Acrocentric'.

Multiple choice botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

Chromosomes appearing rod shaped during anaphase are

  1. Acrocentric

  2. Metacentric

  3. Submetacentric

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

A. An acrocentric chromosome is a  chromosome in which the centromere is located near to one end of the chromosome. 

B. Metacentric chromosomes are X-shaped chromosomes and the centromere are present in the centre so that the two arms are equal.
C. A submetacentric chromosome is a chromosome in which the centromere is located near the slightly away from the centre and the two arms are slightly unequal in length and form L-shape. 
D. A telocentric chromosome is a chromosome in which the centromere is located at the terminal end of the chromosome and their shape is similar to the letter i or is rod-shaped.
So, the correct answer is 'Telocentric'.

Multiple choice botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

Contractile vacuoles take part in

  1. Storage of wastes

  2. Osmoregulation

  3. Excretion

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A contractile vacuole is a sub-cellular organelle found in few protozoans.
  • It is a specialized vacuole which helps in regulating the quantity of water inside cell (osmoregulation- maintaining constant osmotic pressure of the fluids of an organism).
  • It is a part of the protective mechanism which prevents the cell from absorbing too much water and also prevents the rupturing of the cell created due to excessive internal pressure.
  • It also expels out the waste material (ammonia collected from the intercellular fluid) to the cell exterior.
  • So, the correct answer is 'Both B and C'.
Multiple choice botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

Vacuoles are

  1. Cytoplasmic organelles

  2. Non-cytoplasmic organelles

  3. Non-cytoplasmic sacs

  4. Cytoplasmic sacs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Vacuoles are non-living and non-cytoplasmic cell inclusions present in the cytoplasm which contain inorganic and organic molecules.
  • They are present in the form of minute droplets in the cytoplasm of the cells (small vacuole filled with cell sap).
  • So, the correct answer is 'Non-cytoplasmic sacs'.
Multiple choice botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

Which one does not occur in cell vacuoles?

  1. Hydrolytic enzymes

  2. Latex

  3. Anthocyanins

  4. DNA
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A cell vacuole is a membrane-bound (tonoplast) organelle present in cells.
  • It forms an enclosed compartment within the cell which are filled with water, dissolved inorganic and organic molecules (enzymes)
  • They contain hydrolytic enzymes for breaking down the macromolecules (proteins, nucleic acids etc.).
  • Anthocyanin is stored in the vacuoles (flowers and fruits).
  • It does not possess its own DNA as the mitochondria and chloroplasts.
  • So, the correct answer is 'DNA'.
Multiple choice botany cell structure and organization membrane bound organelles cell: size and differentiation microscopy

Number of sap vacuoles present in an animal cell is

  1. One and large

  2. Many and large

  3. Many and small

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Sap vacuoles are small sac-like structures present in the cell which is filled with fluid and serves as storage of materials (cell sap).
  • It forms an enclosed compartment within the cell which are filled with water, dissolved inorganic and organic molecules (enzymes)
  • It stores food and variety of nutrients required by the cell to survive and also store waste products which protect the cell from getting contaminated.
So, the correct answer is 'Many and small'.
Multiple choice botany nucleus and chromosome membrane bound organelles cell: size and differentiation microscopy

One type of chromosome has middle centromere whereas the other has a terminal centromere. They are

  1. Metacentric and acrocentric

  2. Metacentric and telocentric

  3. Submetacentric and telocentric

  4. Acrocentric and metacentric
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Metacentric chromosomes are X-shaped chromosomes and the centromere are present in the centre so that the two arms are equal.
  •  A telocentric chromosome is a chromosome in which the centromere is located at the terminal end of the chromosome and their shape is similar to the letter i.
  • So, the correct answer is 'Metacentric and telocentric'.