Tag: caskets of life

Questions Related to caskets of life

To distinguish microscopically between cheek cell and onion cell mount, one should look for the presence or absence of 

biology caskets of life observation of cells observing cells cell as structural and functional unit

  1. Mitochondria

  2. Plastids

  3. Cell membrane

  4. Nucleus

Show answer
Correct Option: B
Explanation:

Plastids are double membrane bound organelles found inside plants and some algae, which are primarily responsible for activities related to making and storing food. Many plastids are photosynthetic but some are not.

Therefore, to differentiate between a plant and an animal cell under a microscope, one must look for the presence of plastids.

Geeta was asked to prepare a temporary mount of onion peel and list the steps. While writing, she wrote the following steps, which may not be in proper sequence. The correct sequence would be
(i)   Add a few drops of safranin stain and transfer to a slide.
(ii)  Cover it with a coverslip.
(iii) Add a drop of glycerine.
(iv) Take out onion peel.
(v)  Keep the peel in water in a petri dish.

biology caskets of life observation of cells observing cells cell as structural and functional unit

  1. i, ii, iii, iv, v

  2. iv, v, iii, ii, i

  3. iv, v, i, iii, ii

  4. v, iv, i, iii, ii

Show answer
Correct Option: C
Explanation:

Initially, onion peel has to be taken out.
Then, keep the onion peel in water in a petridish. This will remove the impurities sticked to onion peel. 
Then, add a few drops of safranine stain and transfer to a slide.
Then, add a drop of glycerine on onion peel. This step prevents the peel from drying out. 
Then, cover it with a cover slip for observing it under the microscope and to study the cell pattern. 

Why is glycerine used for preparing a temporary mount?

biology caskets of life observation of cells observing cells cell as structural and functional unit

  1. Glycerine is isotonic to the cell sap

  2. It avoids drying of the material

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Glycerine is isotonic to the cell sap. Due to this, cells used for mount will not shrink or swell and can be seen in their natural form. Also, glycerine makes the mounted material moist and prevents it from drying out. 

Plant cells differ from animal cells in having __________.

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. cell wall

  2. plastids

  3. a large central vacoule

  4. all of these

Show answer
Correct Option: D
Explanation:

A plant cell has rigid wall on the outside. It has plastids and a centrally located large vacuole. All of these are absent in an animal cell.

The shape of an animal and plant cell is primarily maintained respectively by the following

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Exoskeleton, endoskeleton

  2. Cell membrane, cell wall

  3. Cytoskeleton, cell wall

  4. Endoskeleton, cytoskeleton

Show answer
Correct Option: A

Which of the following is found in any plant cell but not in animal cell?

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Cell wall

  2. Mitochondria

  3. Cell membrane

  4. Nucleus

Show answer
Correct Option: A
Explanation:
  • The cell wall is a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose.
  • A major function of the cell wall is to give the cell strength and structure and to filter molecules that pass in and out of the cell.
  • It is absent in the animal cell.
Hence cell wall is found in any plant cell but not in the animal cell.
So, the correct answer is 'Cell wall'.

The term 'sarcode' for protoplasm was coined by

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Dujardin

  2. Hugo Von Mohl

  3. Fontana

  4. F. Meischer

Show answer
Correct Option: A
Explanation:
Leeuwenhoek was the first to see free living cells. He observed bacteria, protozoa, red blood cells, sperms etc. under his microscope. In 1809, Lamarck concluded that all living beings are formed of cells. Living substance was first observed by Corti in 1772 and was named sarcode by Dujardin in 1835.
So, the correct answer is 'Dujardin'.

'Protoplasm is the physical basis of life' was suggested by

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Purkinje

  2. Huxley

  3. Sidney Fox

  4. Hugo Von Mohl

Show answer
Correct Option: B
Explanation:
Protoplasm or living matter is a polyphasic crystallo-colloidal complex that possesses all the properties of life and is found inside living cells. It was called as sarcode by Dujardin in 1835. The term protoplasm was coined by Purkinje in 1839. Huxley in 1868, has called it as physical basis of life because all the properties of life reside in the protoplasm.
So, the correct answer is 'Huxley'.

Cell organelle which differentiates plant cell from animal cell is

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Cell membrane

  2. Plastids

  3. Nucleolus

  4. Vacuoles

Show answer
Correct Option: B
Explanation:

The plastid is the most important double-membrane organelle in the cells of plants and algae and absent in animal cells. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids are cell organelles found in all plant cells and in euglenoids. They bear some specific pigments which impart specific colours to the plants.

The animal and plant cells differ in their

bio-chemistry caskets of life animal cells vs plant cells comparing plant and animal cells comparison between animal and plant cell

  1. Movement

  2. Growth

  3. Nutrition

  4. Respiration

Show answer
Correct Option: C
Explanation:
Plant and animal cells both are eukaryotic cell but, they possess certain distinguishing characters like plants are autotrophic while animals are heterotrophic in general. Plants are able to trap light energy and converts them into chemical energy, while animals depend on plants for the food.