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

Which of the following statements is not true about cell theory?

  1. The bodies of all living beings are made up of cells and their products.

  2. Cells are the structural units in the body of a living organism.

  3. Every cell is made up of a small mass of protoplasm having nucleus.

  4. All organelles of cell can survive individually.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A cell can survive independently but not its organelles.

Multiple choice

Which of the following options is not a cell organelle?

  1. Mitochondria

  2. Ribosomes

  3. Cytoplasm

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

Cytoplasm is the jelly-like substance filling the cell, NOT an organelle. Organelles (mitochondria, ribosomes, Golgi bodies) are specialized structures suspended within the cytoplasm.

Multiple choice

Which of the following is not correctly matched?

  1. Photorespiration - Peroxisome

  2. ATP Synthesis - Ribosome

  3. Production of ribosomal subunits - Nucleolus

  4. Maintaining structure of the cell - Microtubules

  5. Increasing surface area of plasma membrane - Mesosome
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mitochondria play a central role in making chemical energy available to the cell (ATP Synthesis). Ribosomes are the sites for protein synthesis.

Multiple choice

Which of the following are semi-autonomous organelles?

  1. Mitochondria and golgi apparatus

  2. Chloroplast and mitochondria

  3. Golgi apparatus and lysosomes

  4. Chloroplast and golgi apparatus

  5. Mitochondria and lysosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Although they exist within cells, chloroplasts and mitochondria are sometimes referred to as semi-autonomous organelles because they contain their own DNA and reproduce independently of the nucleus of the eukaryotic cell in which they are located.

Multiple choice

Which of the following statement is incorrect?

  1. Acrosomes are produced by Golgi complex.

  2. The principal protein of cilia and flagella is globulin.

  3. Centrosome is responsible for initiation of cell division.

  4. The site for detoxification reaction in liver is SER.

  5. Cellular organelles containing hydrolytic enzymes are lysosomes.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The principal protein of cilia and flagella is tubulin.

Multiple choice

Tonoplasts are ___________.

  1. cellular organelles that contain acid hydrolase enzymes that break down waste materials and cellular debris

  2. aggregation of several ribosomes held together by a single strand of m-RNA

  3. differentially permeable membranes surrounding the vacuole

  4. transmembrane glycoproteins, which are located in the membrane of the rough endoplasmic reticulum

  5. the part of a cell that helps to organize microtubules and are involved in mitosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tonoplasts are differentially permeable membranes surrounding the vacuole. 

Multiple choice

Which of the following statements is FALSE regarding mitochondria?

  1. Mitochondria are cell organelles with electrons transport system.

  2. Solar energy is converted into ATP in mitochondria.

  3. Syntesis of ATP in mitochondria takes place at the cristae.

  4. The enzymes for Kreb’s cycle in mitochondria are located in perimitochondrial space.

  5. Mitochondria are yellow in colour due to presence of riboflavin.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The enzymes for Kreb’s cycle in mitochondria are located in mitochondrial matrix.

Multiple choice

Which of the following is a set of cell components without membrane?

  1. Endoplasmic Reticulum, Golgi complex, Lysosome

  2. Ribosome, Nucleolus, Chromosome

  3. Lysosome, Ribosome, Chromosome

  4. Nucleolus, Endoplasmic Reticulum, Golgi complex

  5. Ribosome, Nucleolus, Lysosome
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ribosome, Nucleolus, Chromosome: All are cell components without membrane.