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All questions of Cell Structure for A Level Exam

Which cell organelle is present in both prokaryotic and eukaryotic cells?
  • a)
    Mitochondria
  • b)
    Endoplasmic reticulum
  • c)
    Nucleus
  • d)
    Ribosomes
Correct answer is option 'D'. Can you explain this answer?

Hansa Sharma answered
  • Prokaryotes and eukaryotes are the two different types of cells. 
  • Eukaryotic cells contain membrane-bound organelles, such as the nucleus, endoplasmic reticulum, mitochondria while prokaryotic cells do not but the ribosome is the only organelle that can be seen in both prokaryotic and eukaryotic cells. 
  • Prokaryotic and eukaryotic ribosomes perform the same functions that is protein synthesis, however, eukaryotic ribosomes are much larger than prokaryotic ones.
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 Which of the following is a prokaryote?
  • a)
    Bacteria
  • b)
    Amoeba
  • c)
    Chlamydomonas
  • d)
    Spirogyra
Correct answer is option 'A'. Can you explain this answer?

Hansa Sharma answered
Prokaryotic cells are cells that do not have a true nucleus or most other cell organelles. Organisms that have prokaryotic cells are unicellular and called prokaryotes. Bacteria and archaea are prokaryotes.

The largest subunit of prokaryotic ribosomes is
  • a)
    40S
  • b)
    60S
  • c)
    30S
  • d)
    50S
Correct answer is 'D'. Can you explain this answer?

Shreya Gupta answered
50S, roughly equivalent to the 60S ribosomal subunit in eukaryotic cells, is the larger subunit of the 70S ribosome of prokaryotes. The 50S subunit is primarily composed of proteins but also contains single-stranded RNA known as ribosomal RNA (rRNA).

Glycocalyx is associated with ___________
  • a)
    Nucleosome
  • b)
    Nucleus
  • c)
    Plasma membrane
  • d)
    Nucleolus
Correct answer is option 'C'. Can you explain this answer?

Preeti Iyer answered
The glycocalyx is a thick outer covering of the plasma membrane. It is composed of strands of sugars and proteins bound together. The result is a thick, sticky layer that helps cells stay put in environments with lots of physical stress.

Each question consists of two statements, namely, Assertion (A) and Reason (R).
Assertion (A): Prokaryotic cells have no membrane-bound organelles.
Reason (R): The cytoplasm of prokaryotic cells does not show a streaming movement.
For selecting the correct answer, use the following code:
  • a)
    Both assertion and reason are correct and the reason is the correct explanation for assertion
  • b)
    Assertion is correct but the reason is incorrect.
  • c)
    Both assertion and reason are correct but the reason is not the correct explanation for the assertion.
  • d)
    Both assertion and reason are incorrect.
Correct answer is option 'A'. Can you explain this answer?

Prasenjit Chavan answered
Explanation:
• Prokaryotic cells, which are found in bacteria and archaea, lack the membrane-bound organelles that are present in eukaryotic cells. These organelles include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes.
• The cytoplasm of prokaryotic cells does not show a streaming movement, which is a characteristic of eukaryotic cells. In eukaryotic cells, the cytoplasmic streaming is driven by motor proteins that move along actin filaments and microtubules.
• The absence of membrane-bound organelles in prokaryotic cells is related to their small size and simpler structure. They are able to carry out all their necessary functions within the cytoplasm without the need for specialized compartments.
• The lack of cytoplasmic streaming in prokaryotic cells is also related to their small size, as diffusion is sufficient for most of their metabolic processes.

Assertion (A): Prokaryotic cells have no membrane-bound organelles.
Reason (R): The cytoplasm of prokaryotic cells does not show a streaming movement.

The correct answer is option 'A'. Both the assertion and reason are correct, and the reason is the correct explanation for the assertion.

Which is common in plant and animal cells
  • a)
    Mitochondria
  • b)
    Plastids
  • c)
    Centrioles
  • d)
    Central vacuoles
Correct answer is option 'A'. Can you explain this answer?

Ashwini Khanna answered
Mitochondria are present in both plant as well as animal cells. Plastids and central vacuoles are present in plant cells and centrioles are present in only animal cells.

The process of movement of few ions or molecules across the membrane against a concentration gradient from lower to higher  concentration, it is called
a) Diffusion
b)Passive transport
c)Active transport
d) Osmosis
Correct answer is option 'C'. Can you explain this answer?

Vijay Bansal answered
Passive transport, also known as passive diffusion, is a process by which an ion or molecule passes through a cell wall via a concentration gradient, or from an area of high concentration to an area of low concentration. It’s like moving from the train to the platform of a subway station, or stepping out of a crowded room. Basically, passive transport gives an ion or molecule “room to breathe.”

Smallest cell organelle is :-
  • a)
    Lysosome
  • b)
    Centrosome
  • c)
    Ribosome
  • d)
    Golgibody
Correct answer is option 'C'. Can you explain this answer?

Vartika Shukla answered
By definition, an organelle is a phospholipid-membrane bound compartment or structure in a cell with specific function/s. Ribosomes do not qualify to be called as organelles in this regard since they lack the aspect of being membrane-bound, hence considered particulate. However ribosomes can become membrane-bound when they associate with the endoplasmic reticulum.

Can you explain the answer of this question below:

Organisms which lack mitosis division and use binary fission method for cell division are known as

  • A:

    prokaryotes

  • B:

    eukaryotes

  • C:

    yeast

  • D:

    fungi

The answer is a.

Neha Joshi answered
  • As in prokaryotes, centrioles are absent.
  • Centrioles play an important part in mitosis during spindle fibre formation. so mitosis is not seen in them, thus they use binary fission.

Cell organelles with single membrane is
  • a)
    Lysosomes
  • b)
    Chloroplast
  • c)
    Plastids
  • d)
    Mitochondria
Correct answer is option 'A'. Can you explain this answer?

Ishaan Menon answered
Lysosomes are single membrane structures containing enzymes for digestion of all types of macromolecules.

Can you explain the answer of this question below:

Maximum enzymes are found in:-

  • A:

    Lysosomes

  • B:

    Mitochondria

  • C:

    Nucleus

  • D:

    E.R.

The answer is b.

Navya Sengupta answered
Mitochondria is the site for aerobic respiration in cell and produces energy in the form of ATP. For the formation of energy different pathways like electron transport chain, kreb's cycle are involved and operated by the different enzymes. Thus, the maximum number of enzymes are found in  mitochondria. 

 Nuclear membrane is absent in
  • a)
    Nostoc
  • b)
    Penicillium
     
  • c)
    Volvox
  • d)
    Agaricus
Correct answer is option 'A'. Can you explain this answer?

Rohit Shah answered
Nostoc, genus of blue-green algae with cells arranged in beadlike chains that are grouped together in a gelatinous mass. Ranging from microscopic to walnut-sized, masses of Nostoc may be found on soil and floating in quiet water. Reproduction is by fragmentation. A special thick-walled cell (akinete) has the ability to withstand desiccation for long periods of time. After 70 years of dry storage, the akinete of one species germinates into a filament when moistened. Like most blue-green algae, Nostoc contains two pigments, blue phycocyanin and red phycoerythrin, as well as chlorophyll, and has the ability to fix nitrogen in specialized cells called heterocysts. A terrestrial species has been used as a supplementary food source in Asia.

Which of the following is known as "System of membrane" :–
  • a)
    Lysosome
  • b)
    E.R.
  • c)
    Mitochondria
  • d)
    Chloroplast
Correct answer is option 'C'. Can you explain this answer?

Rajeev Saxena answered
Mitochondria are surrounded by a double-membrane system, consisting of inner and outer mitochondrial membranes separated by an intermembrane space. The inner membrane forms numerous folds (cristae), which extend into the interior (or matrix) of the organelle.

Read the given statements and select the correct option.
Statement 1: The cisternae in Golgi complex have cis face and trans face.
Statement 2: The cis face is also called forming face and trans face is also called maturing face.
  • a)
    Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
  • b)
    Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
  • c)
    Statement 1 is correct and statement 2 is incorrect.
  • d)
    Both statements 1 and 2 are incorrect.
Correct answer is option 'B'. Can you explain this answer?

Vivek Patel answered
Golgi complex consists of a stack of cisternae which are curved to give definite polarity to the Golgi apparatus. The convex side (forming/cis face) receives vesicles from endoplasmic reticulum. The concave side (maturing /transface) buds off vesicles as secretion.

The smooth E.R.  is generally made up of :–
  • a)
    Cisternae
  • b)
    Tubules
  • c)
    Vesicle
  • d)
    All the above
Correct answer is 'B'. Can you explain this answer?

Rajesh Gupta answered
Endoplasmic reticulum are made up of three kinds of structure, cisternae, tubules and vesicles.
Cisternae are found in cells actively involved in protein synthesis.Tubules are common in cells involved in lipid and sterol syntheis.Vesicles are found in pancreatic cells and spermatocytes.
Smooth endoplasmic reticulum when observed under a microscope give the apperance of smooth tubular structure.Smooth ER are function in the synthesis of lipids and steriods.

Which of following is not common in chloroplasts and mitochondria?
a)Both are present in animal cells
b)Both contain their own genetic material
c)Both are present in eukaryotic cells
d)Both are present in plant cells
Correct answer is option 'A'. Can you explain this answer?

Lavanya Menon answered
Chloroplast is an organelle which is present in plant cells and green algae and carries out photosynthesis that converts light energy to chemical energy. It contains a pigment called chlorophyll and hence is green in color. This organelle is exclusively present in plant cells. 
On the other hand, mitochondria are organelles present in both plant and animal cells and their primary function is to regulate cellular metabolism and cellular respiration to provide the organism with energy. 
Hence, the correct answer is 'Both are present in animal cells'.

Semiautonomous cell organelle is :–
  • a)
    Mitochondria
  • b)
    Ribosome
  • c)
    Plasma membrane
  • d)
    Peroxysome
Correct answer is option 'A'. Can you explain this answer?

Naina Sharma answered
A eukaryotic cell has DNA in nucleus as well as cell organelles like mitochondria and chloroplasts. The DNA in cell organelles resembles prokaryotic DNA. These organelles (mitochondria and chloroplasts) not only have DNA but also their own protein synthesis machinery. These organelles are double membrane bound and can divide through fission independent of nuclear division. Thus these cell organelles are semi-autonomous.

Which cell organelle secretes zymogen granules :-
a)Lysosomes
b)Smooth E. R.
c)Golgibody
d)Sphaerosomes
Correct answer is option 'B'. Can you explain this answer?

Vijay Bansal answered
The Golgi apparatus is a system of membranous cisternae and vesicles arranged in stacks near the nucleus. Secretory vesicles or granules usually contain specific substances synthesized by cells that are exported to the extracellular medium. They include zymogen granules, mucous droplets, and mast cell granules.

Amphipathic molecule in plasma membrane is :-
  • a)
    Protein
  • b)
    Carbohydrates
  • c)
    Phospholipids
  • d)
    All the above
Correct answer is option 'C'. Can you explain this answer?

Rohan Singh answered
All cells are surrounded by a plasma membrane. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membrane is also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell.

Rough E.R. mainly responsible for:-
  • a)
    Protein synthesis
  • b)
    Cell wall formation
  • c)
    Lipid synthesis
  • d)
    Cholesterol synthesis
Correct answer is option 'A'. Can you explain this answer?

Neha Joshi answered
Rough endoplasmic reticulum carry ribosomes on their surface. The ribosomes present on rough endoplasmic reticulum synthesize secretory proteins. The proteins required for internal use of cell are synthesized on cytoplasmic ribosomes.

The chlorophyll pigment is readily soluble in:-
  • a)
    Water
  • b)
    Acids
  • c)
    Alkalies
  • d)
    Acetone
Correct answer is option 'D'. Can you explain this answer?

Rajesh Gupta answered
The chlorophyll pigment is readily soluble in acetone. Chlorophylls possess a phytyl chain which is bound to a porphyrin ring system. The possession of the phytyl side chain, which is esterified to the carboxyl group of the ring, gives the chlorophylls their lipid character. Moreover, chlorophylls are fat-soluble compounds that can be extracted from water-containing living plant tissue by organic solvents such as acetone, methanol, or ethanol, which can take up water.

Smallest free living organism are
  • a)
    PPLOs
  • b)
    Bacteria
  • c)
    Viroids
  • d)
    Virus
Correct answer is option 'A'. Can you explain this answer?

Rohan Singh answered
Pelagibacter ubique is one of the smallest known free-living bacterium with a length of 0.37-0.89 μm and an average cell diameter of 0.12-0.20 μm. They also have the smallest free-living bacterium genome; 1.8Mbp, 1354 protein genes, 35 RNA genes.

Non pigmented part of chloroplast is called :-
  • a)
    Thylakoids
  • b)
    Grana
  • c)
    Stroma
  • d)
    Lamellae
Correct answer is option 'C'. Can you explain this answer?

Anuj Singh answered
Non-pigmented part of chloroplast is called Stroma.

Stroma is the aqueous matrix present in chloroplasts. It is the non-pigmented part of chloroplasts and fills the space between the thylakoid membranes and the inner membrane of the chloroplast. It is a gel-like fluid that contains several enzymes, DNA, ribosomes, and other soluble proteins. The stroma is enclosed by a double membrane, which separates the chloroplast from the cytoplasm.

Functions of Stromal Enzymes:

1. Calvin Cycle: The stromal enzymes play a crucial role in the carbon fixation process (Calvin cycle) of photosynthesis. The enzymes present in the stroma are responsible for converting CO2 into carbohydrates.

2. Fatty Acid Synthesis: Stromal enzymes also play a role in the synthesis of fatty acids from acetyl-CoA, which is generated during the light-dependent reactions of photosynthesis.

3. Amino Acid Synthesis: The stromal enzymes are involved in the synthesis of amino acids, which are the building blocks of proteins.

4. Nitrogen Assimilation: The stromal enzymes are responsible for the assimilation of nitrogen from the atmosphere into the chloroplast.

Conclusion:

Thus, stroma is an important part of chloroplasts that contains several enzymes and other soluble proteins which are important for the functioning of the chloroplast. The stromal enzymes play a crucial role in the carbon fixation process, fatty acid synthesis, amino acid synthesis, and nitrogen assimilation. Therefore, stroma is an essential component of the photosynthetic machinery of plants.

Plasma membrane is fluid structure due to presence of :–
  • a)
    Carbohydrate
  • b)
    Lipid
  • c)
    Glyco protein
  • d)
    Poly saccharide
Correct answer is option 'B'. Can you explain this answer?

Sanjana Singh answered
See-
composed of a phospholipid bilayer with embedded peoteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells. The plasma membrane is fluid structure due to composed of a phospholipid bilayer.

 The prokaryotic cells are characterised by
  • a)
    Presence of a distinct chromosome
  • b)
    Absence of chromatin material
  • c)
    Absence of a nuclear membrane
  • d)
    Presence of a distinct nuclear membrane
Correct answer is option 'C'. Can you explain this answer?

Vijay Bansal answered
Prokaryotes lack an organized nucleus and other membrane-bound organelles. Prokaryotic DNA is found in a central part of the cell called the nucleoid. The cell wall of a prokaryote acts as an extra layer of protection, helps maintain cell shape, and prevents dehydration.prokaryotic cells are those that do not have a membrane-bound nucleus. In fact "pro-karyotic" is Greek for "before nucleus". Besides bacteria, the cyanobacteria (blue-green algae) are a major group of prokaryotes.

Eukaryotic cells are different from prokaryotic cells in having:
  • a)
     
    True nucleus
  • b)
    Mitochondria in mesosome form
  • c)
    Only smooth endoplasmic reticulum
  • d)
    70S ribosomes
Correct answer is option 'A'. Can you explain this answer?

Anjali Iyer answered
Correct option is A)
  • Eukaryotic cells have a true nucleus whereas prokaryotic cells have a primitive nucleus. 
  • The true nucleus of eukaryotes is a double membrane-covered protoplasmic body that contains hereditary information. 
  • A true nucleus is made up of five parts- nuclear envelope, nucleoplasm, nuclear matrix, chromatin, and nucleolus. 
  • The primitive nucleus of a prokaryote is also called as nucleoid as it lacks these parts. It is comprised of only the genetic material. So, option A is correct.

Red colour of tomato and chilly is due to :-
  • a)
    Lycopene in chloroplast
  • b)
    Xanthophylls in chromoplast
  • c)
    Lycopene in chromoplast
  • d)
    Anthocyanin in leucoplast
Correct answer is option 'C'. Can you explain this answer?

Raghav Bansal answered
As the tomato ripens, its colour starts to change from green to yellow and then eventually to red. This is due to the breakdown of chlorophyll, which in turn synthesises a red carotenoid (another pigment group), lycopene. When ripe, the carotenoid can easily be seen as the dominant colour of the tomato.

A single unit membrane surrounds the organelle:
  • a)
    Chloroplast
  • b)
    Nucleus
  • c)
    Lysosome
  • d)
    Microsome
Correct answer is option 'C'. Can you explain this answer?

Pooja Mehta answered
Single membrane-bound: Some organelles are bounded by a single membrane. For example, vacuole, lysosome, Golgi Apparatus, Endoplasmic Reticulum etc. They are present only in a eukaryotic cell.

Plasmodesmata are:-
  • a)
    Pores in cell wall
  • b)
    Pores in cell membrane
  • c)
    Protoplasmic connections
  • d)
    1 and 2 both
Correct answer is option 'C'. Can you explain this answer?

S. G. answered
It's simple Plasmodesmata are protoplasmic connections between adjacent cells.These R threads like structure of protoplasms which travel from protoplasm of one cell to protoplasm of nearest adjacent cell crossing cell wall.These Plasmodesmata connects the protoplasm of adjacent cells.These are charastically found out only in plant cells and ABSENT IN ANIMAL CELLS ..

Mitochondria are present in the :–
  • a)
    Aerobic organism only
  • b)
    Obligate anaerobic organism
  • c)
    Aerobic and obligate anaerobic organism
  • d)
    Angiosperm only
Correct answer is option 'A'. Can you explain this answer?

Amir Raza answered
Mitochondria is involved in aerobic respiration. It generates ATP by utilizing the protein complexes present in the inner mitochondrial membrane. The two major process like TCA cycle and electron transport system majorly take place in mitochondria.

Protoplasm found inside the nucleus is known as
  • a)
    Amyloplast
  • b)
    Nucleoplasm
  • c)
    cytoplasm
  • d)
    Elaioplast
Correct answer is option 'B'. Can you explain this answer?

Nandini Patel answered
Protoplasm is the living content of a cell that is surrounded by a plasma membrane. It is a general term for the cytoplasm. Protoplasm is composed of a mixture of small molecules such as ions, amino acids, monosaccharides and water, and macromolecules such as nucleic acids, proteins, lipids and polysaccharides.Similar to the cytoplasm of a cell, the nucleus contains 'nucleoplasm' (nucleus sap) or karyoplasm. The nucleoplasm is one of the types of protoplasm, and it is enveloped by the nuclear membrane or nuclear envelope. The nucleoplasm includes the chromosomes and nucleoli.

The rod shaped bacteria is called as
  • a)
    Bacillus
  • b)
    Vibrio
  • c)
    Spiral
  • d)
    Spherical
Correct answer is option 'A'. Can you explain this answer?

Dipanjan Chawla answered
The shapes of bacteria are bacillus (rod like), coccus (spherical), vibrio (comma shaped) and spirillum (spiral).

Lysosomes are produced by
  • a)
    Leucoplast
  • b)
    Golgi bodies
  • c)
    Mitochondria
  • d)
    Endoplasmic reticulum
Correct answer is option 'B'. Can you explain this answer?

Rohan Unni answered
These are membrane bound vesicular structures formed by the process of packaging in the Golgi apparatus.

The structure of plasma membrane fluid mosaic model is proposed by
  • a)
    Gram
  • b)
    Singer and Nicolson
  • c)
    Schwann and Schleiden
  • d)
    Robert brown
Correct answer is option 'B'. Can you explain this answer?

Rajeev Saxena answered
 An improved model of the structure of cell membrane was proposed by S.J. Singer and G.L. Nicolson (1972) widely accepted as fluid mosaic model.CORRECT OPTION IS B.

Phospholipid synthetase enzyme occur in :-
  • a)
    RER
  • b)
    SER
  • c)
    Golgibody
  • d)
    Glyoxysome
Correct answer is option 'B'. Can you explain this answer?

Pooja Mehta answered
There are two forms of this enzyme; one is found in the outer mitochondrial membrane, while the other is found in the endoplasmic reticulum. ... This occurs primarily in the endoplasmic reticulum. Phosphatidic acid can be used in the synthesis of several phospholipids by two different mechanisms.

Plasma membrane is :–
  • a)
    Selectively permeable
  • b)
    Permeable
  • c)
    Impermeable
  • d)
    Semipermeable
Correct answer is option 'A'. Can you explain this answer?

Shalini Shalu..... answered
The cell membrane is a selectively permeable membrane, meaning that it allows the passage of water and some select solutes....Thus, option A is right ans..

Chlorophyll in chloroplasts is located in
  • a)
    Pyrenoid
  • b)
    Both grana and stroma
  • c)
    Grana
  • d)
    Stroma
Correct answer is option 'C'. Can you explain this answer?

Raghav Bansal answered
Correct Answer :- c
Explanation : Chloroplasts are structurally made up of two components- thylakoids (internal membrane structures) and stroma. Some of the thylakoid membranes are stacked one above the other and are called as grana. The grana contain light trapping pigment chlorophyll and are thus the site of light reaction.

Which of the following cell organelles store hydrolytic enzymes?
  • a)
    Chloroplasts
  • b)
    Centrioles
  • c)
    Chromoplasts
  • d)
    Lysosomes
Correct answer is option 'D'. Can you explain this answer?

Hitakshi Tamta G answered
Lysosomes are spherical bodies, or vacuoles that are enclosed by a single membrane  (membrane- bound organelles). It contains different hydrolytic enzymes, such as proteases, lipases, and nucleases that are capable of breaking down all types of biological polymers (e.g., proteins, nucleic acids, carbohydrates, and lipids) that enter the cell or are no longer useful to the cell. So, the correct answer is 'Lysosome'.

Carbohydrates, the most abundant biomolecules on Earth, are produced by
  • a)
    Viruses, fungi and bacteria
  • b)
    Fungi, algae and green plant cells
  • c)
    Some bacteria, algae and green plant cells
  • d)
    All bacteria, fungi and algae
Correct answer is option 'C'. Can you explain this answer?

Rocky Handsome answered
Carbohydrates are organic compounds synthesized in the chlorophyll containing cells of some bacteria,-algae and green plant cells, during photosynthesis. Certain photoautotrophic bacteria eg. Green sulphur bacteria and purple sulphur bacteria contain pigments like chlorobium chlorophyll and bacteriochlorophyll respectively that helps them in photosynthesis. During photosynthesis carbon dioxide is reduced into carbohydrates by water and oxygen is liberated. so option C ) is correct ( . __ .)

Animal cell do not possess
  • a)
    Centriole
  • b)
    Plamsodesmata
  • c)
    Ribosomes
  • d)
    Plasmalemma
Correct answer is option 'B'. Can you explain this answer?

Prisha Singh answered
Animal cell do not possess plasmodesmata but it contain ribosomes, centriole andplamalemma. Plasmodesmata is the connection between two plant cells.

Which one is present nearest to plasmamembrane?
  • a)
    Secondary wall
  • b)
    Tonoplast
  • c)
    Middle lamella
  • d)
    Primary wall
Correct answer is option 'A'. Can you explain this answer?

Rajesh Datta answered
The cell wall of a young plant cell, the primary wallis capable of growth, which gradually diminishes as the cell matures and the secondary wall is formed on the inner (towards membrane) side of the cell.

Synthesis of cell wall material takes place in :–
  • a)
    Dictyosome
  • b)
    Mitochondria
  • c)
    Lysosome
  • d)
    E.R.
Correct answer is option 'A'. Can you explain this answer?

Lavanya Menon answered
In plant cells, Golgi apparatus consists of a number of isolated units called as dictyosomes while in animal cells it occurs as single compact or loose complex. The dictyosomes are engaged in secretory activities (because secretory materials are produced in dictyosomes) and rapid divisions (because wall materials are synthesized in dictyosomes). 

Cytoskeleton is made of
  • a)
    Phosphoglycerides
  • b)
    Micro tubules
  • c)
    Proteinaceousfilaments
  • d)
    Hemicellulose
Correct answer is option 'C'. Can you explain this answer?

Rajeev Saxena answered
Proteinaceous filaments
The cytoplasm of all eukaryotic cells is crisscrossed by a network of protein fibres that support the shape of the cell and anchor organelles to fixed locations. It is a dynamic system with three types of fibres-actin filaments, microtubule and intermediate filaments.

Small particles projecting from the inner membrane and cristae of mitochondria are
  • a)
    Oxysomes
  • b)
    Microsomes
  • c)
    Informosomes
  • d)
    Myeloid bodies
Correct answer is option 'A'. Can you explain this answer?

C.k Singh answered
Oxysomes are the structure present in the inner surface of mitochondra.it is also known as f0-f1particle or Atp synthese.oxysomes play an important role in formation energy for the functioning of the cell.oxysome help in the electron transport i.e oxidation and reduction rxn in respiration.

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