Prepare for NEET Biology Cell: The Unit of Life with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert solutions to understand cell structure and function.
Lysosomes are known as 'suicidal bags' because they contain:
Respiratory enzymes
Hydrolytic enzymes
Photosynthetic pigments
Hormones
Which of the following is NOT a primary function of cell membrane proteins?
Transporting molecules across the membrane
Acting as receptors for signaling molecules
Synthesizing lipids
Providing structural support to the membrane
The fluidity of the cell membrane is primarily influenced by the:
Amount of cholesterol present
Saturation level of fatty acid tails in phospholipids
Concentration of peripheral proteins
Presence of glycoproteins
Which component of the cell membrane is primarily responsible for its selective permeability?
Glycoproteins
Peripheral proteins
Phospholipid bilayer
Cholesterol
In facilitated diffusion, molecules move across the membrane with the help of:
ATP hydrolysis
Membrane proteins
Concentration gradient against their movement
Vesicle formation
The process by which a cell engulfs large particles or even other cells is called:
Pinocytosis
Exocytosis
Osmosis
Phagocytosis
Which of the following cell organelles is NOT directly involved in protein synthesis?
Ribosomes
Rough Endoplasmic Reticulum
Smooth Endoplasmic Reticulum
Golgi Apparatus
Which organelle is responsible for the detoxification of drugs and poisons, especially in liver cells?
Lysosomes
Rough Endoplasmic Reticulum
Smooth Endoplasmic Reticulum
Peroxisomes
Which organelle plays a crucial role in apoptosis (programmed cell death)?
Golgi apparatus
Ribosomes
Lysosomes
Endoplasmic Reticulum
The inner membrane of the mitochondria is highly folded. What is the purpose of these folds, called cristae?
Store genetic material
Facilitate protein synthesis
Increase surface area for ATP production
Regulate the passage of molecules