Welcome to the Lysosomes MDCAT MCQs with Answers. In this post, we have shared Lysosomes Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Lysosomes MCQs in this MDCAT Online Test.
Lysosomes are primarily involved in which process?
a) Protein synthesis
b) Energy production
c) Intracellular digestion
d) DNA replication
The enzymes inside lysosomes are called:
a) Hydrolytic enzymes
b) Oxidative enzymes
c) Digestive enzymes
d) Kinase enzymes
Lysosomes are formed from which organelle?
a) Mitochondria
b) Golgi apparatus
c) Endoplasmic reticulum
d) Nucleus
The primary function of lysosomes is to:
a) Synthesize proteins
b) Break down waste materials
c) Store nutrients
d) Perform photosynthesis
Which of the following substances is broken down by lysosomes?
a) Glucose
b) Old organelles
c) Ribosomes
d) DNA
Lysosomes are often referred to as the:
a) Powerhouse of the cell
b) Protein factory
c) Suicidal bags of the cell
d) Command center
Which type of enzyme do lysosomes contain?
a) Amylase
b) Lipase
c) Protease
d) All of the above
The pH inside lysosomes is:
a) Neutral
b) Slightly basic
c) Acidic
d) Slightly alkaline
Lysosomes help in autophagy, which is the process of:
a) Producing ATP
b) Cell self-digestion
c) Protein synthesis
d) DNA replication
Which of the following organelles works closely with lysosomes in recycling cell materials?
a) Golgi apparatus
b) Nucleus
c) Mitochondria
d) Ribosomes
Lysosomal storage diseases are caused by:
a) Lack of ATP
b) Defective lysosomal enzymes
c) Overproduction of proteins
d) DNA mutations in the nucleus
Which of the following is an example of a lysosomal storage disease?
a) Cystic fibrosis
b) Tay-Sachs disease
c) Diabetes
d) Sickle cell anemia
Lysosomes can break down all of the following except:
a) Proteins
b) Carbohydrates
c) Lipids
d) Water
The absence or malfunction of lysosomes in cells would lead to:
a) Efficient energy production
b) Accumulation of waste materials
c) Increased protein synthesis
d) Enhanced cell communication
The lysosomal membrane prevents:
a) Water loss
b) Leakage of digestive enzymes into the cytoplasm
c) Transport of ATP
d) Protein synthesis
Which organelle is known to fuse with lysosomes for digestion of external materials?
a) Mitochondria
b) Vacuoles
c) Golgi apparatus
d) Nucleus
Lysosomes play a critical role in which type of immunity?
a) Innate immunity
b) Adaptive immunity
c) Humoral immunity
d) Cell-mediated immunity
In which of the following cells are lysosomes most abundant?
a) Neurons
b) Muscle cells
c) White blood cells
d) Red blood cells
Which process allows lysosomes to digest external material engulfed by the cell?
a) Exocytosis
b) Phagocytosis
c) Osmosis
d) Pinocytosis
Lysosomes are known to contain over 50 different types of:
a) Lipids
b) Carbohydrates
c) Enzymes
d) DNA strands
The fusion of lysosomes with a food vacuole results in the formation of a:
a) Primary lysosome
b) Secondary lysosome
c) Autophagosome
d) Golgi vesicle
Lysosomes are surrounded by how many membranes?
a) 1
b) 2
c) 3
d) None
Which of the following cellular components is responsible for degrading damaged or unnecessary cellular components?
a) Mitochondria
b) Lysosomes
c) Ribosomes
d) Endoplasmic reticulum
What is the primary difference between primary and secondary lysosomes?
a) Size
b) Function
c) Primary lysosomes contain inactive enzymes
d) Location in the cell
Which of the following cell organelles is referred to as the “garbage disposal” of the cell?
a) Mitochondria
b) Lysosome
c) Nucleus
d) Ribosome
Lysosomal enzymes are most active at which pH?
a) Neutral pH
b) pH 5
c) pH 7
d) pH 9
Autolysis, or self-destruction of a cell, occurs when:
a) Mitochondria malfunction
b) Lysosomes release enzymes into the cytoplasm
c) Ribosomes stop functioning
d) The nucleus stops DNA synthesis
Which organelle is involved in programmed cell death (apoptosis)?
a) Nucleus
b) Mitochondria
c) Lysosomes
d) Endoplasmic reticulum
Lysosomes are absent in which type of cells?
a) Plant cells
b) Animal cells
c) Fungal cells
d) Bacterial cells
The lysosome was first discovered by:
a) Robert Hooke
b) Christian de Duve
c) Albert Einstein
d) Louis Pasteur
Which of the following cells would you expect to have a higher number of lysosomes?
a) Red blood cells
b) White blood cells
c) Muscle cells
d) Nerve cells
Lysosomal enzymes are synthesized by which organelle?
a) Mitochondria
b) Golgi apparatus
c) Ribosomes on rough ER
d) Nucleus
Lysosomes participate in which of the following cellular processes?
a) Protein synthesis
b) Lipid metabolism
c) Digestion of macromolecules
d) Nucleic acid synthesis
Which of the following substances cannot be broken down by lysosomes?
a) Proteins
b) Carbohydrates
c) Nucleic acids
d) Glucose
What happens when lysosomes malfunction in a cell?
a) Excessive ATP production
b) Waste accumulates in the cell
c) Cell growth increases
d) DNA replication stops
Which of the following organelles provides a pathway for the export of lysosomal enzymes?
a) Mitochondria
b) Endoplasmic reticulum
c) Ribosomes
d) Golgi apparatus
Lysosomes play a role in defense by digesting:
a) DNA
b) Invading pathogens
c) Cellulose
d) Vitamins
Which of the following is a symptom of lysosomal storage disorders?
a) Rapid cell growth
b) Accumulation of undigested substances
c) Increased protein synthesis
d) Enhanced energy production
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