CBSE Questions for Class 11 Medical Biology Cell The Unit Of Life Quiz 10 - MCQExams.com

Role of nucleus in morphological differentiation was discovered in _______________.
  • Acetabularia by Hammerling
  • Drosophila by Morgan
  • Neurospora by Beadle and Tatum
  • Garden Pea by Mendel.
Lysosomes are called suicidal bags because they have
  • Catabolic enzymes
  • Hydrolytic enzymes
  • Parasitic activity
  • Food vacuole
What would happen if lysosomes get ruptured in a cell?
  • Cell dies
  • Cell shrinks
  • Cell swells up
  • Nothing would happen
Endoplasmic reticulum remains attached to
  • Mitochondria
  • Golgi bodies
  • Nuclear envelope
  • Chloroplasts
Plasmalemma is made of
  • A single protein layer
  • Single lipid layer
  • Single lipid layer and two protein layers
  • Single protein and single lipid layer
Lysosomes contain
  • Carbohydrates
  • Hormones
  • Nucleic acids
  • Hydrolases
SER is mainly found in cells actively engaged in/SER is site of
  • Secretion activity
  • Protein metabolism
  • Lipid metabolism
  • Catabolic activity
Function of R.E.R. is
  • Autolysis
  • Lipid synthesis
  • Protein synthesis
  • Carbohydrate synthesis
Nissl granules are formed from
  • RER
  • SER
  • DNA
  • Golgi Bodies.
E.R. is more developed in ___________.
  • Green cells
  • Young cells
  • Mature cells
  • Bacteriophage.
Membrane system considered to be extension of infolded plasma membrane is
  • Golgi complex
  • Plastids
  • Mitochondria
  • Endoplasmic reticulum
Protein synthesis occurs in an animal cell in
  • Cytoplasm
  • Cytoplasm as well as mitochondria
  • Ribosomes attached to nuclear envelope
  • Nucleolus as well as cytoplasm
Percentage of cell membranes contained in endoplasmic reticulum is __________.
  • 10-20%
  • 20-30%
  • 30-60%
  • 60-75%
E.R. was discovered by
  • Palade
  • Porter et al
  • Thompson
  • Both B and C
E.R. is made of 
  • Cisternae
  • Tubules
  • Vesicles
  • All of the above
A membrane-lined system of channels present throughout the cytoplasm is
  • Endoplasmic reticulum
  • Golgi apparatus
  • Microtubules
  • Both B and C
Membrane thickness of E.R. is
  • 75 $$\overset{o}{A}$$
  • 90 $$\overset{o}{A}$$
  • 50-60 $$\overset{o}{A}$$
  • 30-40 $$\overset{o}{A}$$
R.E.R. is
  • Neutrophilic
  • Acidophilic
  • Basophilic
  • Neurogenic
What is more abundant in S.E.R?
  • Cisternae and vesicles
  • Cisterns and tubules
  • Tubules and vesicles
  • Cisternae
S.E.R. takes part in synthesis of
  • Lipids and steroids
  • Vitamins
  • Carbohydrates
  • All of the above
The term endoplasmic reticulum was coined by
  • Thompson
  • Palade
  • Porter
  • Garnier
Eukaryotic cells devoid of E.R. are
  • Liver cells
  • Kidney cells
  • Mature leucocytes
  • Mature erythrocytes
Lysosomes were first seen and named by
  • De Duve
  • Palade
  • Novikoff
  • Robertson
Secondary lysosomes are
  • Digestive vacuoles
  • Autophagic vacuoles
  • Residual vacuoles
  • All of the above
Main function of lysosomes is
  • Secretion
  • Respiration
  • Extracellular digestion
  • Intracellular digestion
Lysosomes originate from
  • Plasmalemma
  • Golgi apparatus
  • Both A and B
  • R.E.R.
Which one is lysosomal activity _______________.
  • Reabsorption of tadpole tail
  • Mobilisation of stored substances
  • Removal of obstructions
  • All the above.
Pollutants, toxins and carcinogens are detoxified by
  • $$P_{450}$$ and $$P_{448}$$
  • S.E.R. in liver
  • R.E.R. in liver
  • Both A and B
R.E.R. is specialised for synthesis of
  • Local proteins
  • Local proenzymes
  • Proteins and proenzymes for transport
  • Hormones
pH of lysosome interior is
  • 10-12
  • 8-10
  • 5-7
  • 4-5
Disease caused by hyperactivity of lysosomes is _____________.
  • Arthritis
  • Gout
  • Lung fibrosis
  • All the above
De Duve discovered lysosomes from ______________.
  • Orchid root cells
  • Rat liver cells
  • Rat kidney cells
  • Leaf cells.
Leucoplasts are present in
  • Green cells
  • Pigmented cells other than green
  • Non pigmented cells
  • Both A and B
Cell membrane is not permeable to ___________.
  • CO
  • Glutamic acid
  • Glucose
  • Glucose-6-phosphate.
Which type of enzyme occurs in lysosome?
  • Lyase
  • Ligase
  • Hydrolase
  • Transferase
Lipid molecules of plasma membrane are arranged
  • Alternately
  • In series
  • Parallel
  • Scattered
Pigment free plastids are
  • Chloroplasts
  • Chromoplasts
  • Lysosomes
  • Leucoplasts
Starch is stored in
  • Chromoplasts
  • Amyloplasts
  • Chloroplasts
  • Both B and C
Organelle associated with lipid and lipoprotein synthesis is
  • Mitochondria
  • E.R.
  • Chloroplasts
  • Lysosomes
Amyloplasts are connected with storage of
  • Starch
  • Fat
  • Glycogen
  • Protein
Plastids storing proteins are called
  • Elaioplasts
  • Oleosomes
  • Aleuroplasts
  • Phaeoplasts
Organelle connected with glycosidation of proteins is __________.
  • Ribosome
  • E.R.
  • Mitochondrion
  • Chloroplast.
Chromatin material which remains condensed during interphase is called
  • Heterochromatin
  • Euchromatin
  • Chromonemata
  • Megachromatin
When a lysosome fuses with a phagosome/food, it results in the formation of
  • Secondary lysosome
  • Primary lysosome
  • Autophagic vacuole
  • Residual body
Messenger RNA is formed in
  • Nucleus
  • E.R.
  • Ribosomes
  • Golgi apparatus
Nucleoplasm is also called
  • Nuclear sap
  • Karyolymph
  • Both A and B
  • Nuclear matrix
Organelle connected with lipid synthesis is
  • Ribosome
  • SER
  • Golgi apparatus
  • All of the above
Experiments to demonstrate importance of nucleus in controlling growth and heredity were performed on
  • Acetabularia
  • Neurospora
  • Leucocytes
  • Starfish egg
Which is incorrect in relation to lysosome?
  • They contain acid hydrolases
  • They are autophagic
  • They can digest proteins, nucleic acids, lipids and polysaccharides
  • They are monomorphic
Nucleus controls cytoplasmic functioning by sending out
  • Cholesterol
  • Protein
  • RNA's
  • DNA copies
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 11 Medical Biology Quiz Questions and Answers