All Free Biology MCQs with Answers

• A. Lysosomes
• B. RER
• C. Centrioles
• D. SER

Explanation: The Golgi complex is involved in the formation of lysosomes. The Golgi complex is a cell organelle that is responsible for processing and…

• A. RER-Golgi apparatus -Secretory vesicles
• B. SER-RER -Golgi apparatus-Secretory vesicles
• C. RER-SER-Secretory vesicles-Golgi apparatus
• D. RER-Golgi apparatus-Secretory vesicles-SER

Explanation: The transport of secretory proteins takes place through the following organelles in this order:Rough endoplasmic reticulum (RER): The RER…

• A. Vacuole
• B. Golgi apparatus
• C. Endoplasmic reticulum
• D. Lysosomes

Explanation: Vacuoles are organelles found in plant cells that are responsible for storing a variety of substances, including water, nutrients, and…

• A. Nucleolus
• B. Smooth surface endoplasmic reticulum
• C. Ribosomes
• D. Food vacuoles

Explanation: The detoxification of drugs is the function of SER while protein synthesis is the function of RER.

• A. Centrioles
• B. R.E.R
• C. Microtubules
• D. Ribosomes

Explanation: Centrioles are present in animal cells but absent in plant cells.

• A. Vacuole
• B. Plastids
• C. Mitochondria
• D. Golgi apparatus

Explanation: The Golgi body is served as a 'primary packaging area' for molecules that will be 'distributed throughout the cell".It is a flattened…

• A. Provides mechanical shape
• B. Regulate passage of molecules
• C. Maintain cellular homeostasis
• D. Prevent from osmotic lysis

Explanation: The animal cell membrane provides mechanical support, maintain cellular homeostasis, and regulate passage of molecules across the…

• A. Galactose
• B. Glucose
• C. Phospholipid
• D. Carbohydrate

Explanation: Fluid mosaic model of the plasma membrane describes the arrangement of phospholipids in two layers, stabilized interiorly by the…

• A. Phospholipid
• B. Carbohydrate
• C. Polysaccharide
• D. Cellulose

Explanation: Permeability of membrane depends upon phospholipids in plasma membrane.

• A. RNA and proteins
• B. RNA and carbohydrates
• C. RNA and lipids
• D. Proteins and carbohydrate

Explanation: Chemically ribosomes are composed of an almost equal amount of RNA and proteins; hence. they are ribonucleo-protein particles.

• A. Plasma cells have RER in abundance
• B. RER is more abundant than SER in adipose tissue
• C. RBCs lack both RER and SER
• D. Hepatocytes have both RER and SER

Explanation: Adipose tissue is concemed with conversion, synthesis and storage of lipids that is why it contains more SER than RER.

• A. Lysosomes
• B. Vacuoles
• C. RER
• D. SER

Explanation: When the vesicles of the golgi complex fuse with the endosomes, a lysosome is formed.

• A. Endoplasmic reticulum
• B. Ribosomes
• C. Chloroplast
• D. Golgi body

Explanation: Golgi complex is considered as secretory organelle of the cell. Secretory proteins are synthesized on RER, then transferred to Golgi…

• A. Primary lysosomes
• B. Tertiary lysosomes
• C. Secondary lysosomes
• D. Quaternary lysosomes

Explanation: Secondary lysosomes are formed by the fusion of primary lysosomes with food vacuole.

• A. Chloroplast and mitochondria cannot live independently.
• B. 70S ribosome is attached with the inner membrane of mitochondria and chloroplast.
• C. Chloroplast and mitochondria are single membrane structure.
• D. Number of mitochondria and chloroplast are same in all cells.

Explanation: Mitochondria and chloroplasts both are considered as semi-autonomous organelles and are thought to be symbiotically originated from…

• A. Mitochondria
• B. Plastids
• C. Lysosomes
• D. Ribosomes

Explanation: Mitochondria are the power house of a cell. Aerobic cellular respiration takes place in mitochondria In eukaryotic cells.

• A. Cisternae
• B. Lamella
• C. Cristae
• D. Tonoplast

Explanation: Fact: The inner membrane of the mitochondria having infolds is called cristae.

• A. Matrix
• B. Cristae
• C. Porins
• D. Ribosomes

Explanation: Fact: The finger like infoldings which are formed by inner membrane of mitochondria are called cristae.

• A. Nucleolus
• B. Golgi body
• C. Peroxisomes
• D. Nucleoplasm

Explanation: The function of nucleolus is the synthesis of ribosomes. It stores and synthesizes all the components needed for their synthesis.

• A. Prokaryotic cells are bigger than eukaryotic cells.
• B. Prokaryotic cells evolved before eukaryotic cells.
• C. Eukaryotic cells do not have a nucleus, prokaryotic cells do.
• D. Eukaryotic cells are simple, prokaryotic cells are complex.

Explanation: Prokaryotic cells may have arisen more than 3.5 billion years ago while eukaryotes are thought to have first appeared about 1.5 billion…