Tag: caskets of life

Questions Related to caskets of life

Hybridoma cells are

botany caskets of life the cell structure cytoplasm unicellular and multicellular organisms number and shape of cells diversity and classification in animals cell parameters

  1. nervous cells of frog

  2. hybrid cells resulting from myeloma cells

  3. only cells having oncogenes

  4. product of spore formation in bacteria.

Show answer
Correct Option: B

Choose the correct answers from the alternatives given.
Slime molds have:

biology caskets of life the cell structure cytoplasm unicellular and multicellular organisms

  1. pseudoplasmodia

  2. feeding stages consisting of solitary, individual cells

  3. spores that develop into free-living amoeboid cells

  4. spores that develop into flagellated gametes

Show answer
Correct Option: D
Explanation:

The haploid spores are produced from the mass by meiosis, these spores are developed or germinated into flagellated gametes. 

So, the correct option is 'spores that develop into flagellated gametes'.

To observe Amoeba and Paramecium in a water drop, the drop was taken on a glass slide. If both the organisms were clearly seen, then the stain used must be ________.

biology caskets of life the cell structure cytoplasm unicellular and multicellular organisms

  1. Methylene blue

  2. Iodine

  3. Safranin

  4. Eosin

Show answer
Correct Option: A
Explanation:

Microorganisms can be observed under microscope using particular stain. To observe Amoeba and Paramecium in a water drop, the drop was taken on a glass slide. If both the organisms were clearly seen, then the stain used must be Methylene blue or thionin. Both these stains are LTP, that is Lipid transfer protein. They are used to observe animal cells like amoeba and paramecium through hybridization membranes like water. This stain makes the nucleus of amoeba and paramecium visible under microscope.

Thus, the correct answer is 'Methylene blue.'

Shape of Paramecium is 

biology caskets of life the cell structure cytoplasm unicellular and multicellular organisms

  1. Circular

  2. Oval

  3. Rectangular

  4. Square

Show answer
Correct Option: B
Explanation:

The Paramecium is a unicellular ciliated protozoan. It looks an oval, slipper-shaped micro-organism when observed under a microscope, rounded at the front/top and pointed at the back or bottom. It can also be seen by naked eyes.

Choose the correct answers from the alternatives given.
Which one of the following protists is not correctly linked to the type of movement it shows?

biology caskets of life the cell structure cytoplasm unicellular and multicellular organisms

  1. Amoeboids-pseudopodia

  2. Ciliates-cilia

  3. Zooflagellates-flagella

  4. Sporozoa-flexing the pellicle

Show answer
Correct Option: D
Explanation:

Sporozoa do not have flagella, cilia, or pseudopodia and they show gliding movement, amoeboids show movement by pseudopodia, ciliates by cilia and zooflagellates show by flagella, the pellicle is shown by paramecium.

So, the correct option is 'Sporozoa-flexing the pellicle'.

Peel should not be allowed to dry while observing under microscope beacuse

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

  1. It causes more stomata to open

  2. It causes closure of stomata

  3. It  results in increase in total number of stomata

  4. None of these

Show answer
Correct Option: D
Explanation:

The observation of the onion peel is to see the arrangement of the cells that are separated by the thin layer. In onion, the peel is taken out from the scaly leaves that do not perform photosynthesis. They perform the function of storage. So, they do not show the stomata or the chloroplast. After the removal, the peel is kept in water to avoid drying of the leaves.

Hence, the correct answer is 'None of the above'

Where do we generally mount the material on the slide?

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

  1. In the centre

  2. On left side of slide

  3. On right side of slide

  4. Both B and C

Show answer
Correct Option: A
Explanation:

The material which is mounted on the slide is usually of fluid consistency. So, to avoid its spilling from sides, it is mounted in the centre. Also, if it is mounted at left or right side, then under microscope the material is not seen clearly. Hence, usually material is mounted in the centre. 

Which of the following is the main difference between onion peel cells and human cheek cells?

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

  1. Presence of mitochondria in onion peel cells only

  2. Presence of cell wall in onion peel cells only

  3. Absence of plasma membrane in cheek cells

  4. Absence of endoplasmic reticulum

Show answer
Correct Option: B
Explanation:

All living things are composed of cells. They are the building blocks of all life. Cells come in many different shapes and have different functions. Plant and animal cells are different, too. The main difference between plant and animal cells is that plant cells have a cell wall on the outer layer, whereas animal cells only have a cell membrane. The cell wall is a protective layer outside the cell membrane that also provides support for the cell's structure.

Which material did you use in the laboratory to observe vacuoles?

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

  1. Rheo

  2. Betel

  3. Onion

  4. Torch cactus

Show answer
Correct Option: C
Explanation:

The onion peels were used to observe the vacuoles in the laboratory because the onion has scaly leaves that perform the function of storage of food and have a large vacuole present in their cells. 

Hence, the correct answer is 'Onion' 

Which of the following is not present in onion cell?

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

  1. Nucleus

  2. Chloroplast

  3. Cytoplasm

  4. Cell wall

Show answer
Correct Option: B
Explanation:

The clear epidermal cells exist in a single layer and do not contain chloroplasts, because the onion fruiting body (bulb) is used for storing energy, not photosynthesis. Each cell has a cell wall, cell membrane, cytoplasm, nucleus and a large vacuole. The nucleus is present at the periphery of the cytoplasm. The vacuole is prominent and present at the centre of the cell, surrounded by cytoplasm.