Cell as unit of life (NCERT Level ) (NEET/AIIMS Online Practice Exam)

Cell theory created a sense of mystery around living phenomena that is :-
1. physiological processes
2. behavioural process
3. Biochemical process
4. All
Which process was the requirement of integrity of cellular organisation for living phenomena to be demonstrated or observed:-
1. Cell doctrine
2. Cell theory
3. Modernization of cell theory
4. ) All
The physiological process that a cell controls in tissue or organ or organ system is/are:-
1. Digestions
2. Excretions
3. Respiration
4. All
The physico-chemical approach to understand cell-free systems can be done by knowing :-
1. physiological processes
2. behavioural process
3. Biochemical process
4. All
The physiological process that a cell controls in tissue or organ or organ system is/are:-
1. Digestions
2. Excretions
3. Respiration
4. All
Which process emphasised the unity underlying this diversity of forms in cellular organization?
1. Cell doctrine
2. Cell theory
3. Modernization of cell theory
4. All
Which concepts and techniques are applied to understand biology :-
1. Mathematics
2. Physics
3. Chemistry
4. Both ‘Physics’ & ‘Chemistry’
Who was the founder of the ‘Madras school’ of conformational analysis of biopolymers:-
1. C.N. RAMACHANDRAN
2. G.M. RAMACHANDRAN
3. G.N. RAMACHANDRAN
4. D.N. RAMACHANDRAN
RAMACHANDRAN in his book NATURE published :-
1. double helical structure of collagen
2. triple helical structure of collagen
3. double helical structure of reticulin
4. All
α-helix and β-sheet of protein was first given by :-
1. C.N. RAMACHANDRAN
2. Linus Pauling
3. Berxelius
4. All
What is it that makes an organism living, or what is it that an inanimate thing does not have which a living thing has is :-
1. Cell as basic unit of life
2. Cell as building block of life
3. Cell as functional unit of life
4. All
The organism having single cell is called as :-
1. Unicellular – BGA
2. Multicellular – Sponge
3. Unicellular – E.coli
4. Both Unicellular – BGA’ & ‘Unicellular – E.coli’
The organism having many cell cell is called as :-
1. Unicellular – BGA
2. Multicellular – Sponge
3. Unicellular – E.coli
4. Both ‘a’ & ‘c’
Unicellular organisms are capable of:-
1. independent existence
2. performing the essential functions of life
3. Contnuity of life process
4. All
Who discovered the living cell?
1. Anton Von Leeuwenhoek
2. Robert Hook
3. Robert Brown
4. Both ‘Anton Von Leeuwenhoek’ & ‘Robert Hook’
Who discovered the dead cell?
1. Anton Von Leeuwenhoek
2. Robert Hook
3. Robert Brown
4. Both Anton Von Leeuwenhoek’ & 'Robert Hook’
Who discovered the establishment of cell?
1. Anton Von Leeuwenhoek
2. Robert Hook
3. Robert Brown
4. Both ‘Anton Von Leeuwenhoek’ & ‘Robert Hook’
All the detailed internal structure of cell was possible due to :-
1. Microscope
2. Electron microscope
3. Telescope
4. Both ‘Microscope’ & ‘Electron microscope’
Who observed that all plants are composed of different kinds of cells which form the tissues of the plant:-
1. only during fetal development
2. Malthias Schleiden
3. Theodore Schwann
4. Both ‘Nalthias Schleiden’ & ‘Malthias Schleiden’
Who first gave the idea of plasma membrane in cell:-
1. Nalthias Schleiden
2. Malthias Schleiden
3. Theodore Schwann
4. Both ‘Nalthias Schleiden’ & ‘Malthias Schleiden’
Who gave the hypothesis that the bodies of animals and plants are composed of cells and products of cells:-
1. Nalthias Schleiden
2. Malthias Schleiden
3. Theodore Schwann
4. all of these
Cell Theory was formulated by :-
1. Nalthias Schleiden
2. Malthias Schleiden
3. Theodore Schwann
4. Both ‘Nalthias Schleiden’ & 'Malthias Schleiden ’
Who formulated “Omnis cellula-e cellula”?
1. Kudolf Virchow
2. Rudolf Virchow
3. Robert Virchow
4. None
According to cell theory :-
1. all living organisms are composed of cells and products of cells
2. all cells arise from pre-existing cells
3. All cell exists from pre-existing cell
4. All of these
Inside each cell is a dense membrane bound structure called
1. Nucleus
2. Mitochondria
3. Lysoosome
4. Ribosome
The DNA is stored inside :-
1. Chromatid
2. Chromosome
3. Gene
4. All
Cells that have membrane bound nuclei are called ---------, whereas cells that lack a membrane bound nucleus are -------.
1. Prokaryote , Eukaryote
2. Eukaryote, Prokaryote
3. Bacteria,Animalia
4. None
The main arena of cellular activities in both the plant and animal cells is
1. Protoplasm
2. Cyoplasm
3. Nucleoplasm
4. All
The living state of cell is maintained by chemical reaction taking in :-
1. Cytoplasm
2. Protoplasm
3. Nucleoplasm
4. All
the eukaryotic cells have other membrane bound distinct structures called :-
1. Organism
2. Organelles
3. Organs
4. All
The organelle found in both prokaryotic and Eukaryotic cell is:-
1. Chloroplast
2. Ribosome
3. Miocrobodies
4. All
In Animal cell the non-membrane structure is :-
1. Centriole
2. Nucleolus
3. Ribosome
4. All of these
The smallest cell is :-
1. Mycoplasma
2. PPLO
3. Pleuropneumonia like organism of Gram +ve bacteria
4. All of these
The length of the smallest cell is
1. 0.2 millimicron
2. 0.3 milimicron
3. 3 milimicron
4. 0.3 micron
The largest isolated single cell is :-
1. Egg of Ostrich
2. Egg of Struthio camelus
3. Egg of Eagle
4. Both ‘Egg of Ostrich’ &’Egg of Struthio camelus’
Among multicellular organisms the largest cell is :-
1. Human Erythrocyte cell
2. Musk deer RBC
3. Dog RBC
4. All
The longest cell in Animal is :-
1. Neuron of Brain
2. Neuron of body
3. Neuron of eye
4. Both ‘Neuron of Brain' & ‘Neuron of body’
The shape of the cell may vary by :-
1. Function they perform
2. Physiology they perform
3. Metabolic activity they perform
4. All of these
The world’s smallest cell is :-
1. Mycoplasma
2. PPLO
3. Pleuropneumonia like organism of Gram +ve bacteria
4. All of these
The smallest cell in human body is -
1. Eye cell
2. Sperm cell
3. Leydig cell
4. None
Name the cell in human body that never divides :-
1. RBC
2. WBC
3. Sperm cell
4. All of these
Give a cell having two nucleus :-
1. Amoeba
2. Paramecium
3. Malaria poarasite
4. All of these
Which one of the following does not differ in E.coli and Chlamydomonas?
1. Cell wall
2. Cell Membrane
3. Ribosome
4. Chromosomal Organization
What is true about ribosomes?
1. These are found only in eukaryotic chromosome
2. They are self-splicing introns of some RNA
3. The prokaryotic ribosome is 80S where ‘S’ is sedimentation coefficient.
4. They are composed of ribonucleic acid and protein
Which one of the following is not a constituent of cell membrane?
1. Phospholipid
2. Cholesterol
3. Glycolipids
4. Prolione
Vital stains are employed to study:-
1. Living Cell
2. Frozen Tissue
3. Fresh Tissue
4. Preserved Tissue
Nuclear matter without envelope occurs in:-
1. Bacteria and Green Algae
2. Bacteria and Cyanobacteria
3. Cyanobacteria and Red Algae
4. Mycoplasma and Green Algae
Smaller cell is :-
1. Less active metabolically
2. With large nucleus
3. With smaller nucleus
4. More active metabolically
The barrier between the protoplasm and the other environment in an animal cells :-
1. Cell wall
2. Nuclear membrane
3. Tonoplast
4. Plasma membrane
The term ‘Cell’ was given by :-
1. Leeuwenhoek
2. Robert hooke
3. Flemming
4. Robert Brown
Who proposed the cell theory?
1. Schleiden and Schwann
2. Watson and Crick
3. Darwin and Wallace
4. Mendel and Morgan
Centrosome is found in:-
1. Cytoplasm
2. Nucleus
3. Chromosomes
4. Nucleolus
Within a cell the site of respiration (oxidation) is the :-
1. Ribosome
2. Golgi apparatus
3. Mitochondrion
4. Endoplasmic Reticulum
Which is called ‘Suicidal Bag’ ?
1. Centrosome
2. Lysosome
3. Mesosome
4. Chromosome
Double membrane is absent in :-
1. Mitochondrion
2. Chloroplast
3. Nucleus
4. Lysosome
Organisms lacking nucleus and membrane bound organelle are :-
1. Diploids
2. Prokaryotes
3. Haploids
4. Eukaryotes
Animal cell is limited by :-
1. Plasma membrane
2. Shell membrane
3. Cell wall
4. Basement membrane
Cell organelle found only in Plant is :-
1. Golgi apparatus
2. Mitochondria
3. Plastids
4. Ribosomes
A function of lysosomes is :-
1. synthesis
2. hydrolysis
3. replication
4. respiration
Spindle fibre is formed from:- :-
1. ribosome
2. centriole
3. nucleolus
4. All of these
Most prokaryotic cells, particularly the bacterial cells, have a chemically
complex?
1. Cell covering
2. Cell envelop
3. cell memebrane
4. All of these
The prokaryotic covering is bounded by :-
1. glycocalyx
2. cell wall
3. plasma membrane
4. All of these
On the basis of covering bacteria can be differentiated into:-
1. Gram positive
2. Gram negative
3. Mycoplasma
4. Both ‘Gram positive’ & ‘Gram negative’
The bacterial layer below the covering is made up of glycoprotein and glycolipids so the layer together called as :-
1. Lioprotein
2. Glycocalyx
3. Glycolipoprotein
4. All of these
The layer around the cell wall of bacteria is called as :-
1. Glycocalyx
2. Loose slime
3. Capsule
4. Slime
The layer around the cell wall of bacteria is not thick called as :-
1. Glycocalyx
2. Loose slime
3. Capsule
4. Slime
The layer around the cell wall of bacteria is not thick called as :-
1. Glycocalyx
2. Loose slime
3. Capsule
4. Both ‘Loose slime’ & ‘Capsule’
The structure that determines the shape of the cell and provides a strong structural support to prevent the bacterium from bursting or collapsing called:-
1. Glycocalyx
2. Cell wall
3. Capsule
4. Slime
The plasma membrane of bacteria is similar to eukaryotic cell in its basic function called:-
1. Permeable
2. Semi-permeable
3. Selectively permeable
4. All of these
A special membranous which is formed by the extensions of plasma membrane into the cell for amitosis is :-
1. Mesosomes
2. Lateral mesosomes
3. Septal mesosomes
4. All of these
A special membranous which is formed by the extensions of plasma membrane into the cell for respiration is:-
1. Mesosomes
2. Lateral mesosomes
3. Septal Mesosomes
4. All of these
A special membranous which is formed by the extensions of plasma membrane into the cell for is in the form like:-
1. Vesicles
2. Tubules
3. Lamellae
4. All of these
The cell wall formation is controlled by:-
1. Vesicles
2. Tubules
3. Lamellae
4. All of these
The extensions of plasma membrane into the cell helps DNA replication,respiration, secretion processes, to increase the surface area of the plasma membrane and enzymatic content called:-
1. Mesosomes
2. Lateral mesosomes
3. Septal Mesosomes
4. All of these
In some prokaryotes like cyanobacteria, there are other membranous extensions into the cytoplasm called:-
1. Mesosome
2. Chromatophores
3. Lateral Mesosome
4. Both ‘Mesosome’ & ‘Chromatophores’
If bacteria is motile, they have thin filamentous extensions from their cell wall called
1. Cillia
2. Flagella
3. Pilli
4. All of these
Bacterial flagellum is composed of :-
1. filament
2. hook
3. basal body
4. All of these
The pili are elongated tubular structures made of a special protein:-
1. Pillin
2. Fimbrin
3. Keratin
4. Both ‘Pillin’ & ‘Fimbrin’
Small bristle like fibres sprouting out of the cell help attach the bacteria to rocks in streams and also to the host tissues called:-
1. Pilli
2. fimbriae
3. Flagella
4. Both ‘Pilli’ & ‘fimbriae’
In prokaryotes ribosomes are associated with.
1. Plasmamembrane
2. Cell wall
3. mRNA
4. Pili
The ribosomes in prokaryotic are about:-
1. 10 nm by 20 nm in size
2. 15 nm by 30 nm in size
3. 15 nm by 20 nm in size
4. 15 nm by 24 nm in size
The ribosome in prokaryotic is :-
1. 40S and 30S
2. 50S and 30S
3. 40S and 60S
4. None
Several ribosomes may attach to a single mRNA and form a chain called?
1. polyribosomes
2. polysome
3. Multisome
4. Both ‘polyribosomes’ & ‘polysome’
Reserve material in prokaryotic cells are stored in the cytoplasm in the form :-
1. Secretory products
2. Cell inclusions
3. Granules
4. All of these
Reserve material in prokaryotic cells are:-
1. phosphate granules
2. cyanophycean granules
3. glycogen granules
4. All of these
Gas vacuoles are found in:
1. blue green bacteria
2. Purple Photosynthetic bacteria
3. Green Photosynthetic bacteria
4. All of these
The eukaryotes include:-
1. protists
2. plants
3. animals
4. All
In eukaryotic cells there is an extensive compartmentalisation of cytoplasm through the presence of membrane bound organelles
1. compartmentalisation of Protoplasm
2. compartmentalisation of Cytoplasm
3. compartmentalisation of Nucleoplasm
4. All of these
The Eukaryotic genetic material is organised:-
1. Chromatin
2. DNA
3. Chromatid
4. Chromosome
Animal cells have organelle which are absent in almost all plant cells :-
1. Cell wall
2. Vacuoles
3. Centriole
4. All
The chemical nature of cell membrane was first found in:-
1. WBC
2. Matured RBC
3. Mycoplasma
4. All of these
The evidence of cell membrane having lipid with bilayer was found in:-
1. WBC
2. Matured RBC
3. Mycoplasma
4. All of these
The lipids are arranged within the membrane with the polar head towards the ----- sides and the hydrophobic tails towards the ------ part :-
1. Inner, Outer
2. Outer, Inner
3. Outer
4. All of these
The nonpolar tail of saturated hydrocarbons is protected from the:-
1. Vitreous environment
2. Aqueous environment
3. Acidic environment
4. Both ’Vitreous environment’ & ‘aqueous environment’
Biochemical investigation clearly revealed that the cell membranes also possess:-
1. Protein
2. Carbohydrate
3. Acid
4. Both ‘Protein’ &’Carbohydrate’
In human beings, the membrane of the erythrocyte has approximately Protein And lipid ratio as:-
1. 52 % and 40 %
2. 40 % and 52 %
3. 32 % and 40 %
4. 52 % and 20 %
Depending on the ease of extraction, membrane proteins can be classified as :-
1. Intrinsic & Extrinsic
2. Peripherial & Transmembrane
3. Globular protein
4. Both ‘Intrinsic & Extrinsic’ & ‘Peripherial & Transmembrane’
An improved model of the structure of cell membrane was proposed by Singer and Nicolson
1. Fluid Mosaicc Model
2. Unit membrane model
3. Fluid Mosaic model
4. All of these
According to Fluid Mosaic Model :-
1. quasi-fluid nature of protein & iceberg lipids
2. quasi-fluid nature of lipid & iceberg proteins
3. Solid protein and liquid lipid
4. Both ’quasi-fluid nature of protein & iceberg lipids’ & ‘quasi-fluid nature of lipid & iceberg proteins’
The fluid nature of the membrane is also important from the point of view of functions like :-
1. cell growth
2. intercellular junctions
3. endocytosis
4. All
One of the most important functions of the plasma membrane is.
1. transport of the ions across it
2. transport of the salts across it
3. transport of the molecules across it
4. All of these
Many molecules can move briefly across the membrane without any requirement of energy and this is called the:-
1. Active transport
2. Passive transport
3. Fasciliated transport
4. All of these
Neutral solutes may move across the membrane of concentration gradient by the process of ?
1. Active transport
2. Passive transport
3. Fasciliated transport
4. Simple diffusion
Water may also move across this membrane from higher to lower concentration by:-
1. Active transport
2. Simple Diffusion
3. Fasciliated transport
4. Osmossis
As the polar molecules cannot pass through the nonpolar lipid bilayer, they require a carrier protein of the membrane:-
1. Active transport
2. Simple Diffusion
3. Fasciliated transport
4. Osmossis
Extra chromosomal, circular, double stranded, self-replicating DNA molecule in bacteria is called:-
1. cosmid
2. plasmid
3. phagemid
4. phasmid
A slippery outer covering in some bacteria that protects them from phagocytosis by host cells :-
1. Capsule
2. Cell wall
3. Peptidoglycan
4. Cell membrane
When flagella are distributed all around a bacterial cell, the arrangement is called :-
1. random
2. peritrichous
3. polar
4. encapsulated
A bacterial cell wall does all of the following except :-
1. gives shape and rigidity to the cell
2. is the site of action for some antibiotics
3. is associated with some symptoms of disease
4. protects the cell from phagocytosis
A Gram negative cell wall is __________ than a Gram positive one.
1. thicker
2. thinner
3. Not known
4. Soft and gel
Membraneous infolding in bacteria that initiate DNA replication is:-
1. mesosomes
2. carboxysome
3. magnetosome
4. nulcleosome
Differences between eukaryotic and prokaryotic cells include all of the following except :-
1. eukaryotic cells have mitochondria
2. prokaryotic cells have no genetic material
3. prokaryotic cells have more complex cell walls
4. eukaryotic cells have cilia and flagella with complex structure
The bacterial envelope includes all of the following structures except :-
1. capsule
2. cell wall
3. cell membrane
4. endospore
Which of the following contains polysaccharide?
1. Gram negative cell wall
2. pili
3. flagella
4. plasmids
The cell wall type that is most vulnerable to the action of penicillin is :-
1. Gram negative
2. Gram positive
3. Spirilla
4. Mycoplasma
Which of the following statements is untrue?
1. A bacterial cell is prokaryotic whereas an animal cell is eukaryotic
2. A bacterial cell has a cell wall whereas an animal cell does not.
3. Bacterial and animal cells both have a well-defined nucleus
4. Bacteria may contain enzymes that are not present in animal cells
The region where bacterial genome resides is termed as:-
1. nucleus
2. cytoplasm
3. nucleoid
4. ribosome free region
Surface appendage of bacteria meant for cell-cell attachment during conjugation is:-
1. pili
2. flagella
3. spinae
4. cilia
Bacterial flagella is made up of:-
1. microtubules
2. tubulin
3. flagellin
4. spinin
Bacteria divides by :-
1. Amitosis
2. Mitosis
3. Meiosis
4. All of these

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Cell as unit of life (NCERT Level ) (NEET/AIIMS Online Practice Exam)

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