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

_______ is not a RNA virus.

  1. Rotavirus

  2. Cypovirus

  3. Parvovirus

  4. Rhinovirus

  5. Picornavirus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Parvoviruses are linear, non-segmented single-stranded DNA viruses.

Multiple choice

The type of glial cells present in PNS are ________.

  1. schwann cells

  2. companion cells

  3. epithelial cells

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

Schwann cells are the primary glial cells responsible for myelinating peripheral nerve fibers in the peripheral nervous system (PNS).

Multiple choice

Glia is the _______ cell.

  1. connective

  2. companion

  3. supportve

  4. helping
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

4 major functions of Glial cells are: 

 1. keep neurons in place (physical support). 

 2. provide nutrients and oxygen. 

 3. insulation, and, 

 4. Phagocytosis of dead neurons and destry pathogens

Multiple choice

Amoeba ingests food by using

  1. vacuole

  2. cytoplasm

  3. endoplasm

  4. nucleus

  5. pseudopodia
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Amoeba ingests food by using pseudopodia. This is the correct answer.

Multiple choice

Which of the following statements are false regarding bacteria?

P. The cytoplasm of a bacterium is supported by microtubules. Q. Bacterial glycocalyx is located inside the cell wall. R. A gram-positive bacterium is stained purple by the gram stain. S. Fimbriae help bacteria to get attached to the other structures.

  1. P and Q

  2. P and R

  3. Q and R

  4. Q and S

  5. R and S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct answer. Both are false statements. The cytoplasm of a bacterium has no internal support structure. Bacterial glycocalyx is a sticky, gelatinous polymer that is external to the cell wall and is composed of polysaccharide, polypeptide or both.

Multiple choice

Mast cells are found in

  1. areolar tissue

  2. adipose tissue

  3. fibrous tissue

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

Mast cells are immune cells that contain granules with histamine and heparin. They are abundant in areolar tissue (a type of loose connective tissue found throughout the body, especially under skin and around blood vessels). Areolar tissue provides a strategic location for mast cells to respond rapidly to pathogens, allergens, and tissue injury by releasing inflammatory mediators.

Multiple choice

Which of the following statements is incorrect?

  1. Both plants and animals contain protoplasm.

  2. Both plants and animals show response to stimuli.

  3. Both plants and animals have cell walls.

  4. Both plants and animals pass on hereditary characters to offspring by the same mechanism.

  5. Certain life processes take place in both animals and plants in identical manner.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This statement is false, hence this option is correct. Plants have cell walls as outer most covering. Animal cells do not have cell walls.

Multiple choice

The basic structural and functional unit of living organism is _________.

  1. tissue

  2. organ

  3. cell

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

The cell is the fundamental unit of life - all living organisms are composed of cells, and cells carry out all life processes. This is a core principle of cell theory. Tissues (A) are groups of cells, organs (B) are groups of tissues, and organ systems (D) are groups of organs - all are built FROM cells, not the basic unit themselves.