Tag: cell structure and micro-organisms

Questions Related to cell structure and micro-organisms

Which cell organelles is absent in an animals cell?

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. A nucleus

  2. A cell wall

  3. A large vacuole

  4. Both B and C

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Correct Option: D
Explanation:

The animal cells are the eukaryotic cells which are composed of well-developed cell organelles. The animal cell can be differentiated from the plant cell due to the absence of certain structures in the cell. The cell wall is absent in the animal's cells and they have only the cell membrane. The vacuole is present in the plant cell for storage and absent in the animal cells. 

Thus, the correct answer is option D. 

Animal cells are 

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. Round and irregular in shape

  2. Round or rectangular in shape

  3. Regular and rectangular in shape

  4. Irregular and square in shape

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Correct Option: A
Explanation:

The main difference between an animal cell and a plant cell is that plant cells have a cell wall and animal cell lacks the cell wall. The cell wall which is made up of cellulose gives the plant cell rigidity resulting in a fixed, rectangular shape. Animal cells lack the rigidity hence, they tend to have a round and irregular shape. Animal cells tend to vary greatly in appearance. The cell wall allows high pressure to build inside of the plant cell without bursting. Due to this, the plant cell is able to accept large amounts of liquid through osmosis without bursting. Animal cells, which only have a thin membrane restricting access to the cell, tend to burst if they absorb too much extra water.

Animal cell is limited by

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. Plasma membrane

  2. Cell membrane

  3. Basement membrane

  4. Both A and B

Show answer
Correct Option: D
Explanation:

The cell wall is absent in an animal cell. The plasma membrane is a biological membrane that separates the interior of animal cells from the outside environment. The basic function of the plasma membrane is to protect the cell from its surroundings. The cell membrane is also known as plasma membrane.

Which of the following is useful for the study of a typical animal cell?

biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

  1. Blood cell

  2. Hair cell

  3. Skin cell

  4. Human cheek cell

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Correct Option: D
Explanation:
As in all animal cells, the cells of the human cheek do not possess a cell wall. A cell membrane that is semi-permeable surrounds the cytoplasm. Unlike plant cells. Human cheek cells form an excellent example for studying the animal cell as it is easy to obtain freshly for experiments as well as easy to handle while forming mount slide.

Which of the following is absent in an animal cell?

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. Cytoplasm

  2. Nucleus

  3. Cell membrane

  4. Cell wall

Show answer
Correct Option: D
Explanation:

The plants and the animal cells are the eukaryotic cells which are composed of well-developed cell organelles. The animal cell can be differentiated from the plant cell due to the absence of certain structures in the cell. The cell wall is absent in the animal's cells and they have only the cell membrane. 

Thus, the correct answer is option D. 

Which of the following life processes does not take place in animal cells?

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. Movement

  2. Respiration

  3. Excretion

  4. Photosynthesis

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Correct Option: D
Explanation:

The animal cells lack the cellular organelle chloroplast. The chloroplast or the chlorophyll pigments are required for carrying out photosynthesis by capturing solar energy. The animal cells devoid of this organelle cannot perform photosynthesis.

Thus, the correct answer is option D. 

Cell wall is absent in which of the following?

biology cell structure and micro-organisms plant and animal cell cell structure organisation of the organism

  1. Plants

  2. Animals

  3. Mucor

  4. Bacteria

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Correct Option: B
Explanation:

Plants, algae, fungi, bacteria and some archaea have cell walls but animals and protozoa do not have cell walls. Animal cells have plasma membrane.

Which of the following organelles is found in plant cells but not in animal cells?

biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

  1. Nucleus

  2. Mitochodrion

  3. Chloroplast

  4. Golgi apparatus.

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Correct Option: C

Interconvertible organelle in plant cell is 

biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

  1. Plastids

  2. Vacuole

  3. Mitochondria

  4. Lysosome

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Correct Option: A
Explanation:
Chloroplasts (Green Plastids) are plant cell organelles which take part in photosynthesis and temporary or permanent storage of starch. In green alga, chloroplasts are of various shapes and sizes but chloroplasts of higher plants are disc-shaped with a diameter of 4 to 6 micrometer and thickness of 2 to 4 micrometer. In embryophytes, they are the second largest cell organelle, smaller only to the nucleus.
Chromosomes are not distinct cell organelles.
Both Golgi apparatus and mitochondria are much smaller than chloroplasts.
So, the correct answer is 'Plastids'

Select the wrong statement from the following.

biology cell structure plant and animal cell cell structure and micro-organisms organisation of the organism

  1. The chloroplasts are generally much larger than mitochondria

  2. Both chloroplasts and mitochondria contain an inner and an outer membrane

  3. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane

  4. Both chloroplasts and mitochondria contain DNA

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Correct Option: A