Biology · Science General

Cell Biology and Structure

3,062 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

Which is a collared cell

  1. Scieroblast

  2. Silicoblast

  3. Chromocyte

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

Choanocytes (also known as "collar cells") are cells that line the interior of asconoid, syconoid and leuconoid body type sponges.

Multiple choice

Sex pili are present in

  1. Nucleus

  2. Cell wall

  3. Gram +ve and Gram -ve

  4. Method of nutrition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A fine, filamentous appendage found on the cell surface of many gram-negative bacteria, shorter, thinner and straighter than flagella

Multiple choice

Acrosome is made up of

  1. Mitochondria

  2. Centrioles

  3. Golgi bodies

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

Acrosome is a cap-like structure derived from the Golgi apparatus.

Multiple choice

In a human cell, Kreb's cycle occurs in

  1. cytosol

  2. mitochondrial matrix

  3. inner mitochondrial membrane

  4. inter membrane space
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Kreb's cycle occurs with in the mitochondrial matrix in all eukaryotic cells.

Multiple choice

Movement of cytoplasm is termed as

  1. Brownian movement

  2. Endocytosis

  3. Cyclosis

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

 This option is correct because the movement of cytoplasm is termed as cyclosis or cytoplasmic streaming.

Multiple choice

Which of the following options is the smallest basic unit of life in living organisms?

  1. Compound

  2. Cell

  3. Nucleus

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

The smallest basic unit of life in living organisms is the one, which is able to perform all the functions of life independently, i.e. the cell. Nucleus and mitochondria are cell organelles which cannot independently carry the functions of life. Compound is a substance made by chemical combination of the atoms.