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

The green coloured pigment, chlorophyll is present in:

  1. nucleus

  2. mitochondria

  3. plastids

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

These are found only in plant cells and in certain protists (e.g. Euglena). They are of two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells not exposed to light. The chromoplasts having light absorbing green pigment, the chlorophyll are called chloroplasts. The chloroplasts are found in the leaves of green plants and are the most common and biologically important of all the plastids.

Multiple choice

The animal cells lacks:

  1. nucleus

  2. endoplasmic reticulum

  3. mitochondria

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

These are found only in plant cells and in certain protists (e.g. Euglena). They are of two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells not exposed to light. They act as storage organelles and are classified on the basis of the material stored in them. Amyloplasts store carbohydrates while the aleuroplasts store proteins. The fat-storing leucoplasts are termed as elaioplasts.

Multiple choice

The cell organelle which occurs in form of interconnected membranous tubules is:

  1. nucleus

  2. mitochondria

  3. plastids

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

It is an ultra-microscopic network of interconnected membranous tubules present throughout the cytoplasm. It is present in almost all eukaryotic cells. It is formed of three types of elements; cisternae, tubules and vesicles. All the elements of endoplasmic reticulum freely communicate with each other and contain a fluid called endoplasmic matrix.

Multiple choice

The cisternae, tubules and vesicles are the part of:

  1. endoplasmic reticulum

  2. nucleus

  3. mitochondria

  4. plastids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is an ultra-microscopic network of interconnected membranous tubules present throughout the cytoplasm. It is present in almost all eukaryotic cells. 

Multiple choice

Amyloplasts store carbohydrates, aleuroplasts store proteins & the elaioplasts stores fats. These are the types of ____ .

  1. nucleus

  2. mitochondria

  3. plastids

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

These are found only in plant cells and in certain protists (e.g. Euglena). They are of two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells not exposed to light. They act as storage organelles and are classified on the basis of the material stored in them. Amyloplasts store carbohydrates while the aleuroplasts store proteins. The fat-storing leucoplasts are termed as elaioplasts.

Multiple choice

Which of the following is related with plant cell?

  1. Glyoxysomes is absent in plant

  2. Cytoplasm always divides by furrowing method in plants.

  3. Sodium chloride is toxic to plant cell.

  4. All plant cell contains centrosome.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sodium chloride is toxic to plant cell. This is the correct option.

Multiple choice

Cell wall material is secreted by

  1. lysosomes

  2. golgi bodies

  3. mitochondria

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cell wall material is secreted by golgi bodies like the glycoproteins and glycolipids.

Multiple choice

Intussusception occurs in

  1. mature cell

  2. young cell

  3. both mature and young cell

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

 Intussusception occurs in young cell.

Multiple choice

Composition and structure of the cell membrane is

  1. Lipoproteinaceous & Bilaminar

  2. lipoproteinaceous and trilaminar

  3. lipoproteinaceous and tetralaminar

  4. phosphoproteinaceous and trilaminar
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Composition and structure of  cell membrane is lipoproteinaceous and trilaminar. Trilaminar means that it is made of two layers of lipids and one of proteins.