Biology · Science General

Cell Biology and Structure

3,221 Questions

Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.

Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components

Cell Biology and Structure Questions

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

Which of the following is a part of protoplasm present between the nuclear membrane and cell organelle?

  1. Leucoplast

  2. Nucleoplasm

  3. Cytoplasm

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cytoplasm is a semi-fluid jelly like substance which contains various organelles and inclusions. It also contains a number of inorganic substances forming a clear true solution as well as organic substances like lipids, proteins and carbohydrates. It is homogenous and colourless in nature.

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

The peripheral zone of cytoplasm is thick and jelly like substance known as 

  1. Plasmosol

  2. Nucleoid

  3. Plasmogel

  4. Plastid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The peripheral zone of cytoplasm is a thick and jelly-like substance known as plasmogel. The neighbouring area of the nuclear region is thin and watery and is called as the plasmosol. It helps to regulate the amount of water needed by the cell in the cytoplasm.

So, the correct answer is option C.

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

A protoplast is

  1. A cell organelle

  2. A cell with a wall

  3. A single wall-less cell

  4. Cell without nucleus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let's say, that we took a plant cell and used specific digestive enzymes to digest it's cell wall. 

After removing the cell wall, we call that cell as 'Protoplast'.
The protoplast typically consists of cytoplasm and plasma membrane but no cell wall.

Where, Cytoplasm is a fluid like substance present inside the plasma membrane and consisting of nutrients, biomolecules and all the cell organelles.
These cell organelles are such as mitochondria, ribosomes, endoplasmic reticulum, Golgi complex, Nucleus etc.

In the eukaryotic organisms such as plants and animals, nucleus is considered as the largest cell organelle.
Hence, the above explanation justifies the answer as option C  i.e., Protoplast is a single wall-less cell.

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

The main arena of various types of activities of a cell is

  1. Nucleus

  2. Plasma membrane

  3. Mitochondria

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

The main arena of various types of cellular activities is the cytoplasm. Cytoplasm represents a bulk of protoplasm excluding nucleus and vacuoles. The inner part of cytoplasm is called as endoplasm and it is usually in perpetual motion called cyclosis or cytoplasmic streaming. Cytoplasm has various types of cell organelles. Cell organelles are highly organized subcellular protoplasmic structures that have a distinctive shape, chemical composition and function.

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

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.

  1. A and D

  2. A and C

  3. A, C, D

  4. All are correct
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice bio-chemistry cell biology cytoplasm the components in a cell component of the cell

What is a cytoplasm?

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Cytoplasm mostly consists of ________

  1. Salt and water

  2. Lipids and proteins

  3. Proteins and water

  4. Salt and sugars
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Which of the following statement is incorrect about cytoplasm?

  1. It is colurless

  2. Behaves like a sol-gel

  3. Very good conductor of electricity

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Which of the following cell organelle is present in cytoplasm ?

  1. Golgi apparatus

  2. Endoplasmic reticulum

  3. Chloroplasts

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Which part of the cell contains organelles?

  1. Cytoplasm

  2. Nucleus

  3. Cell membrane

  4. Cell wall
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Cytoplasm

  2. Ribosome

  3. Golgi apparatus

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Which of the following is not a function of cytoplasm ?

  1. Aids in the movement of the different cellular elements

  2. Means of transport for genetic material

  3. Site of replication of DNA

  4. Transports the products of cellular respiration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cytoplasm is a jelly liquid surrounded by cell membrane that consists of various cell organelles. It is the site of many biochemical reactions that are vital and crucial for maintaining life. However replication of DNA takes place in nucleus which is present in cytoplasm. Hence cytoplasm is not the site of DNA replication.

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

Cytoplasm is surrounded by 

  1. Capsule

  2. Cell wall

  3. Cell membrane

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Cytoplasm is the jelly-like fluid surrounded by the cell membrane and holds all the organelles. 
  • The cytoskeleton present in the cytoplasm gives the cell its shape. 
  • The cytoplasm constitutes of dissolved nutrients and it aids to dissolve waste products.

    Hence, the correct option is C .