MCQ Chapter 8 Cell The Unit of Life Class 11 Biology

Please refer to Cell The Unit of Life MCQ Questions Class 11 Biology below. These MCQ questions for Class 11 Biology with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Cell The Unit of Life will help you to prepare for the exams and get more marks.

Cell The Unit of Life MCQ Questions Class 11 Biology

Please see solved MCQ Questions for Cell The Unit of Life in Class 11 Biology. All questions and answers have been prepared by expert faculty of standard 11 based on the latest examination guidelines.

MCQ Questions Class 11 Biology Cell The Unit of Life

Question- Which of the following cell organelles were discovered after introduction of electron microscope?
(a) Mitochondria
(b) Endoplasmic reticulum
(c) Ribosomes
(d) Both b and c

Question- Cholesterol is synthesized by
(a) Eggs
(b) SER
(c) RER
(d) Golgi body

Question- The proteins that will function outside the cytosol are made by
(a) GB
(b) Ribosomes in mitochondria
(c) Ribosomes on RER
(d) Ribosomes in the nuclues

Question- The SER is the major site of synthesis of
(a) Lipid
(b) Protein
(c) Lipid, steroidal hormones and glycogen metabolism
(d) Protein and lipid

Question- The cytoplasm of animal and plant cell is transversed by a network of tiny tubular membranous system that divides The intracellular space into 2 compartments and extraluminal compartment
The above statement is attributed to
(a) ER
(b) GB
(c) Plasma membrane
(d) Nuclear membrane

Question- Which of the following cell organelles are named after the discoverer?
(a) ER
(b) DNA
(c) GB
(d) ATP

Question- Chloroplast contain
(a) All types of pigments
(b) Chl+carotene+ anthocyanine
(c) Chl+ carotenoids
(d) Only Chl

Question- Which one is the important site of synthesis of glycoprotein and glycolipid?
(a) GB
(b) RER
(c) Lysosome
(d) None

Question- A distinctive feature of the lysosome is that it has
(a) A lower pH
(b) A higher pH than the cytoplasm
(c) A reduced hydrolase activity
(d) Double membrane envelope

Question- The golgi apparatus
(a) Is found in animal cells only
(b) Is found in prokaryotes only
(c) Is the site of rapid ATP production
(d) Packages and modifies proteins

Question- Function of contractile vacuole in Amoeba is
(a) excretion and osmoregulation.
(b) digestion and respiration.
(c) osmoregulation and transportation.
(d) none of the above.

Question- Which of the following statements is/are correct ?
(i) The shape of the cells may vary with the function they perform.
(ii) Human RBC is about 7.0 mm in diameter.
(iii) Cytoplasm is the main area of cellular activities.
(iv) Various chemical reactions occur in cytoplasm to keep the cell in the living state.
(a) (i), (ii), (iii) and (iv)
(b) Only (i) and (ii)
(c) Only (iv)
(d) None of the above

Question- Plastids are found in
(a) all animal cells.
(b) some animal cells.
(c) all plant cells.
(d) all plant cells and euglenoides.

Question- Which of the following is not the function of cell wall?
(i) Provides shape to the cell.
(ii) Protects the cell from mechanical damage and infection.
(iii) Helps in cell to cell interaction.
(iv) Provides barrier to undesirable macromolecules.
(a) Only (i)
(b) Only (iv)
(c) Only (ii), (iii) and (iv)
(d) None of the above

Question- Grana are
(a) protein storing plastids.
(b) coloured plastids.
(c) stacks of thylakoids.
(d) individual thylakoids present in stroma.

Question- Which of the following statements are correct ?
(i) In prokaryotic cells, a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome.
(ii) The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins.
(iii) RuBisCO is the most abundant protein in the whole biosphere.
(iv) Mitochondria, chloroplasts and peroxisomes are not considered as part of endomembrane system.
Of the above statements
(a) (iii) and (iv)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (i) and (iv)

Question- Study the following statements on cilium or flagellum and answer the question.
(i) Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
(ii) Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.
(iii) Flagella are comparatively longer and responsible for cell movement.
(iv) Cilium and flagellum are covered with plasma membrane.
Which of the above statements are correct?
(a) (i) and (ii)
(b) (i), (ii), (iii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)

Question- Axoneme with 9 + 2 microtubular arrangement occurs in
(a) cilia
(b) flagella
(c) both (a) and (b)
(d) centriole

Question- Active transport differs from passive transport in that active transport
(a) requires energy.
(b) always requires input of ATP.
(c) moves molecules against a concentration gradient.
(d) both (a) and (c)

Question- Prokaryotic and eukaryotic flagella differ in the
(a) type of movement and placement.
(b) location and mode of functioning.
(c) microtubular structure and function.
(d) microtubular organization and type of movement.

Question- Which of the following statements is/are correct ?
(i) The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.
(ii) ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen.
(iii) Ribosomes are involved in protein synthesis.
(iv) Mitochondria help in oxidative phosphorylation and generation of ATP.
(a) (ii), (iii) & (iv)
(b) (i) only
(c) (ii) only
(d) (iii) only

Question- Centrioles and centrosomes occur in the cells of
(a) green plants
(b) animals
(c) bacteria and cyanobacteria
(d) both (b) and (c)

Question- Which of the following pair lack the unit membrane?
(a) Nucleus and E.R.
(b) Mitochondria and chloroplast
(c) Ribosome and nucleolus
(d) Golgi body and lysosome

Question- Satellite means
(a) terminal part of the chromosome beyond secondary constriction.
(b) terminal part of the chromosome beyond primary constriction.
(c) terminal part of chromosome beyond tertiary constriction.
(d) none of the above

Question- Golgi apparatus is absent in
(a) higher plants
(b) yeast
(c) bacteria and blue-green algae
(d) None of the above

Question- Chromosomes having equal or almost equal arms are called
(a) metacentric
(b) acrocentric
(c) polycentric
(d) acentric.

Question- Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
(a) Mitochondrion
(b) Lysosome
(c) Golgi apparatus
(d) Endoplasmic reticulum

Question- Which of the following statement of a bacterial cell is/ are correct?
(i) Mesosome is formed by the extensions of plasma membrane into the cell.
(ii) The pili are elongated tubular structures made up of a protein.
(iii) Flagellum is composed of filament, hook and basal body.
(iv) Ribosomes are about 30 nm by 50 nm in size.
(a) (i), (ii) and (iii)
(b) All of the above
(c) (ii) and (iv)
(d) None of the above

Question- A component of cytoskeleton is
(a) microtubule
(b) bone
(c) chitin
(d) cartilage

Question- Protein synthesis in an animal cell occurs
(a) on ribosomes present in cytoplasm as well as in mitochondria.
(b) on ribosomes present in the nucleolus as well as in cytoplasm.
(c) only on ribosomes attached to the nuclears envelope and endoplasmic reticulum.
(d) only on the ribosomes present in cytosol.

Question- According to widely accepted “fluid mosaic model” cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard,which of the following statements is incorrect?
(a) Proteins in cell membranes can travel within the lipid bilayer.
(b) Proteins can also undergo flip-flop movements in the lipid bilayer.
(c) Proteins can remain confined within certain domains of the membrane.
(d) Many proteins remain completely embedded within the lipid bilayer.

Question- The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
(a) chloroplast
(b) mitochondria
(c) lysosome
(d) endoplasmic reticulum

Question- Plastids storing fat are called
(a) Elaioplasts
(b) Sphaerosomes
(c) Aleuroplasts
(d) Pyrenoids

Question- Microtubules are absent in
(a) mitochondria
(b) centriole
(c) flagella
(d) spindle fibres

Question- The cytoskeleton is a proteinaceous network of fibres in the cytoplasm. It is involved in
(a) mechanical support.
(b) motility.
(c) maintenace of cell-shape.
(d) all of these

Question- Select the incorrect statement about prokaryotic ribosomes.
(a) 50S and 30S subunits unite to form 70S ribosomes.
(b) Polysome/polyribosome consists of many ribosomes only.
(c) Ribosome is the site of protein synthesis.
(d) Polysome indicate the synthesis of identical poolypeptide in multiple copies.

Question- The best way to identify a cell as either prokaryotic or eukaryotic is to determine whether
(a) it came from a single-celled or multicellular organism.
(b) it has a nucleus.
(c) it has a plasma membrane.
(d) it has cytosol.

Question- Select the statements which are related to Schwann.
(i) He reported that cells have a thin outer layer which is today known as plasma membrane
(ii) Cell wall is a unique character of the plant cell.
(iii) Body of plants and animals are composed of cells and products of cells.
(a) Only (i)
(b) Only (iii)
(c) (i) and (iii)
(d) All of these

Question- Which of the following statement is correct regarding vacuole?
(a) It is membrane-bound and contains storage proteins and lipids.
(b) It is membrane-bound and contains water and excretory substances.
(c) It lacks membrane and contains air.
(d) It lacks membrane and contains water and excretory substances.

Question- Read the folowing statements and identify the correct option.
(i) Contractile vacuole takes part in osmoregulation and excretion.
(ii) Food vacuole is formed by engulfing the food particles.
(iii) The vacuole is bound by a double membrane called tonoplast.
(iv) Vacuole can occupy upto 90 percent of the volume of the cell.
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (i), (ii) and (iv)
(d) None of the above

Question- Which of the following statements are incorrect ?
(i) Plant cells have centrioles which are absent in almost all animal cells.
(ii) Ribosomes are the site of protein synthesis.
(iii) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.
(iv) In animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum.
Of the above statements
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (ii) and (iv)
(d) (i) and (iv)

Question- Basal bodies are associated with the formation of
(a) phragmoplast
(b) cilia and flagella
(c) cell plate
(d) kinetochore

Question- Both the membranes of mitochondrion are
(a) structurally different but functionally similar.
(b) structurally as well as functionally different.
(c) structurally similar but functionally different.
(d) structurally different but functionally similar.

Question- Choose the wrong statements regarding bacterial cell
(i) Glycocalyx is the outermost envelope in bacteria.
(ii) The glycocalyx could be a loose sheath called capsule.
(iii) The glycocalyx may be thick and tough called slime layer.
(iv) A special structure formed by the plasma membrane is called mesosome.
(v) Small bristle like fibres sprouting out of the cell are called fimbriae.
(a) (i) and (iii)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (i) and (iv)

Question- In prokaryotes, chromatophores are
(a) specialized granules responsible for colouration of cells.
(b) structures responsible for organizing the shape of the organism.
(c) inclusion bodies lying free inside the cells for carrying out various metabolic activities.
(d) internal membrane system which becomes extensive and complex in photosynthetic bacteria.

Question- Consider the following statements and choose the correct statement.
(i) The endomembrane system includes mitochondria, chloroplast and peroxisomes.
(ii) Smooth endoplasmic reticulum is the major site for synthesis of lipid.
(iii) Rough endoplasmic reticulum is actively involved in protein synthesis.
(iv) Mitochondrial matrix possesses single circular DNA, a few RNA and 80S ribosomes.
Of the above statements.
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (iii) and (iv)
(d) (ii) and (iii)

Question- Microtubules, motor proteins, and actin filaments are all part of the
(a) mechanism of photosynthesis that occurs in chloroplasts.
(b) rough ER in prokaryotic cells.
(c) cytoskeleton of eukaryotic cells.
(d) process that moves small molecules across cell membranes.

Question- Given below are some characters of a cell organelle.
Identify the correct organelle which shows all the characters described above.
(i) It is a membrane bound space found in the cytoplasm.
(ii) It is bound by a single membrane called tonoplast.
(iii) It contains water, sap, excretory products and other materials not useful to the cell.
(iv) It has higher concentration of sap than the cytoplasm.
(a) Golgi apparatus
(b) Lysosomes
(c) Endoplasmic reticulum
(d) Vacuoles

Question- Read the statements given below with regard to the functions performed by Golgi apparatus ?
(i) Transport and chemically modify the materials contained within it.
(ii) Performs the function of packaging materials.
(iii) Important site of formation of glycoproteins and glycolipids.
Which of the following is the correct answer ?
(a) (i) is wrong but (ii) and (iii) are correct
(b) (ii) is wrong but (i) and (iii) are correct
(c) (ii) and (iii) are wrong but (i) is correct
(d) All are correct.

Question- Which of the following statements are correct?
(a) Na+/K+ pump is an example of active transport.
(b) In plant cells lipid like steroidal hormones are synthesized in SER.
(c) In plant cells, the vacuoles can occupy up to 10% of the volume of the cell.
(d) Chlorophyll and leucoplast are responsible for trapping light energy essential for photosynthesis.

Question- Which of the following is incorrect ?
(a) Mycoplasma is the smallest cell (0.3 μ).
(b) Bacteria are 3 to 5 μm in size.
(c) The largest cell is the egg of an ostrich.
(d) Nerve cells are some of the smallest cells.

Question- Most of water, in mature plant cells occurs in
(a) nucleus
(b) cell wall
(c) vacuoles
(d) cytoplasm

Question- Which of the following lacks cell wall?
(a) Gametes
(b) Amoeba
(c) Mycoplasma
(d) All of these

Question- What would happen if lysosomes get ruptured in a cell?
(a) Cell dies
(b) Cell shrinks
(c) Cell swell up
(d) Nothing would happen

Question- Cell sap is a
(a) living content of cytoplasm.
(b) nonliving content of cytoplasm.
(c) nonliving content of vacuole.
(d) living content of vacuole.

Question- The fluidity of membranes in a plant in cold weather may be maintained by
(a) increasing the number of phospholipids with unsaturated hydrocarbon tails.
(b) increasing the proportion of integral proteins.
(c) increasing concentration of cholesterol in membrane.
(d) increasing the number of phospholipids with saturated hydrocarbon tail.

Question- Which of the following is absent in prokaryotes?
(a) DNA
(b) RNA
(c) Plasma membrane
(d) Mitochondria

1Question- In which method of transport, plasma membrane does not require carrier molecule?
(a) Active transport
(b) Facilitated diffusion
(c) Simple diffusion
(d) Na+ – K+ pump

Question- pH of vacuolar cell sap is
(a) neutral and isotonic.
(b) alkaline and isotonic.
(c) acidic and hypertonic.
(d) equal to cytoplasm and isotonic.

Question- Nucleolus is
(a) rounded structure found in cytoplasm near nucleus.
(b) rounded structure inside nucleus and having rRNA.
(c) rod-shaped structure in cytoplasm near the nucleus.
(d) none of the above.

Question- You are asked to examine a cell using a powerful light microscope. The image you see has a clearly defined nucleus and mitochondria. It also has a large central vacuole and chloroplasts. From what group of organisms did this cell most likely come?
(a) Bacteria
(b) Protists
(c) Fungi
(d) Plants

Question- Which of the following statement is false?
(a) The ribosomes of a polysome translate the mRNA into protein.
(b) Mitochondria divide by fragmentation.
(c) All cell arise from pre-existing cells.
(d) The lipid component of the membrane mainly consists of phosphoglycerides.