Tag: cell biology

Questions Related to cell biology

Select correct set of statements from given below.
A. The cytoplasm is the main arena of cellular activities in plants and animals. 
B. Cell envelope in bacteria is tightly linked 5 - layered structure.
C. The endomembrane system does not include semi-autonomous organelles.
D. Convex face of golgi bodies is maturing face.

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. A and D

  2. A and C

  3. A, C, D

  4. All are correct

Show answer
Correct Option: B
Explanation:
A. The cell organelles are present in the cytoplasm. Various cellular processes that are important for the survival of cell, occur in the cytoplasm.
B.  Cell envelope in bacteria is a two layered structure consisting of cell wall and cell membrane. In case of gram negative bacteria, an outer membrane is also present.
C. Endomembrane system includes endoplasmic reticulum, Golgi apparatus, vesicles and nuclear envelope. It does not include the semi-autonomous organelles i.e. chloroplast and mitochondrion.
D. Concave face or trans face of Golgi bodies is the maturing face.
Hence, statements A and C are correct.
So, the correct answer is 'A and C'.

What is a cytoplasm?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Irregularly shaped region within the cell that contains genetic material

  2. Storage bubbles found in cells

  3. Fluid content inside the plasma membrane

  4. Cells that lack cell membrane

Show answer
Correct Option: C
Explanation:

Cytoplasm can be defined as a thick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. The cytoplasm is about 80% water and it is usually colourless.

Nucleoproteins are synthesised in?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Nucleoplasm

  2. Nuclear envelope

  3. Nucleolus

  4. Cytoplasm

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Correct Option: A

The semicircular channels and system of tubes found in cytoplasm are known as:

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Ribosomes

  2. Endoplasmic reticulum

  3. Giyoxysomes

  4. Vacuaes

Show answer
Correct Option: B
Explanation:

The semicircular tube like structures present in the cytoplasm are Endoplasmic reticulum. 

So, the correct option is 'Endoplasmic reticulum'

Cytoplasm mostly consists of ________

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Salt and water

  2. Lipids and proteins

  3. Proteins and water

  4. Salt and sugars

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Correct Option: A
Explanation:

The jelly like fluid that fills a cell is called cytoplasm. It is made up of mostly water and salt. Cytoplasm is present within the cell membrane of all cell types and contains all organelles and cell parts. It is made up of eighty percent water and is usually clear and colourless.

Which of the following statement is incorrect about cytoplasm?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. It is colurless

  2. Behaves like a sol-gel

  3. Very good conductor of electricity

  4. None of the above

Show answer
Correct Option: D
Explanation:

Basically cytoplasm is the substance that fills the cell.It is a jelly like substance and it is made up of eighty percent water and is usually clear and colourless.It is thought that the component molecules and structures of the cytoplasm behave at times like a disordered colloidal solution(sol) and at other times like an integrated network,forming a solid mass (gel).This theory thus proposes that the cytoplasm exists in distinct fluid and solid phases depending on the level of interaction between cytoplasmic components.Cytoplasm also constitutes numerous salts and is a very good conductor of electricity.

So, the correct answer is 'None of the above'.

Which of the following cell organelle is present in cytoplasm ?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Golgi apparatus

  2. Endoplasmic reticulum

  3. Chloroplasts

  4. All of the above

Show answer
Correct Option: D
Explanation:

The cytoplasm comprises cytosol and the organelles. Organelles are usually membrane bound structures inside the cell that have specific functions. Some major organelles that are suspended in the cytosol are the mitochondria, the endoplasmic reticulum, golgi apparatus, vacuoles, lysosomes and in plant cells chloroplasts.

Kernplasm theory was proposed by 

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Hartig

  2. O. Hertwig

  3. Huxley

  4. Steward

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Correct Option: B
Explanation:

Kernplasm theory was proposed by O. Hertwig. According to the theory, during the life period of a cell, a constant ratio exist between cytoplasmic and nuclear masses and this maintains equilibrium between the cytoplasm and the nucleus.

Which part of the cell contains organelles?

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Cytoplasm

  2. Nucleus

  3. Cell membrane

  4. Cell wall

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Correct Option: A
Explanation:

Cytoplasm is a gel-like substance present in all cells. All of the cell organelles are suspended in the cytoplasm and perform life sustaining activities and thus cytoplasm is called as living fluid.

The jelly-like substance present between the cell membrane and the nucleus is called as 

bio-chemistry cell biology cytoplasm the components in a cell component of the cell

  1. Cytoplasm

  2. Ribosome

  3. Golgi apparatus

  4. All of the above

Show answer
Correct Option: A
Explanation:

Cytoplasm is a thick solution that fills each cell. It is enclosed by the cell membrane. It is made up of water, salts and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. Hence, the correct answer is the option A.