CBSE Questions for Class 11 Medical Biology Cell The Unit Of Life Quiz 9 - MCQExams.com

A cell organelle containing hydrolytic enzymes is
  • Ribosome
  • Mesosome
  • Lysosome
  • Microsome
Which cell organelle carries the functions of mechanical support, enzyme circulation, protein synthesis and detoxification of drugs?
  • Chromoplast
  • Chloroplast
  • Mitochondria
  • Endoplasmic reticulum
The process by which specific materials can be moved across a plasma membrane with the help of transport protein is
  • Concentration gradient
  • Active transport
  • Osmosis
  • Facilitated transport
  • Phagocytosis
Which organelle digests or dissolves worn out organelles?
  • cell membrane
  • nucleus
  • lysosomes
  • mitochondria
  • vacuole
In a humoral response, the main function of a B-cell is to make antibodies against antigens. Which organelle would be well represented in an electron micrograph of a such a cell?
  • Mitochondria
  • Peroxisomes
  • Lysosomes
  • Rough endoplasmic reticulum
Which of the following characteristics distinguish the prokaryotes from eukaryotes?
  • The absence of membrane-bound organelles in prokaryotic cells
  • Smaller and less complicated eukaryotic cells
  • The presence of ribosomes in eukaryotic cells only
  • The method of nutrition
Which of the given cell organelles carry out the functions given in the table?
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  • Ribosomes
  • Chloroplast
  • Mitochondria
  • Endoplasmic reticulum
Which of the following macromolecules function as energy storage compounds, components of cell membranes and can also provide insulation?
  • Proteins
  • Carbohydrates
  • Steroids
  • Lipids
  • Nucleic acids
Which of the following is the correct sequence that a newly synthesized secretory protein would follow until it is exported from the cell?
  • Smooth ER$$ \rightarrow$$ Rough ER $$\rightarrow $$ Golgi apparatus $$\rightarrow$$ Cell membrane
  • Golgi apparatus $$\rightarrow$$ Rough ER $$\rightarrow $$ Cell membrane
  • Golgi apparatus $$\rightarrow$$ Smooth ER $$\rightarrow $$ Cell membrane
  • Rough ER $$\rightarrow $$ Golgi apparatus $$\rightarrow$$ Cell membrane
  • Smooth ER $$\rightarrow $$ Golgi apparatus $$\rightarrow$$ Cell membrane
Which cell organelle reduces the number of other organelles?
  • Endoplasmic reticulum
  • Mitochondria
  • Lysosome
  • Ribosome
Prokaryotes have circular DNA while eukaryotes have linear chromosomes. This is evidence that
  • All eukaryotes are more closely related to each other than they are to prokaryotes.
  • Eukaryotes are the ancestors of prokaryotes.
  • Eukaryotes are the direct descendants of modern prokaryote species.
  • Prokaryote DNA typically has more associated proteins than eukaryotic DNA.
______________ is the seat of biological oxidations .
  • Endoplasmic reticulum
  • ATP
  • Mitochondria
  • Golgi complex
An interconnecting membranous network of the cell composed of vesicles, flattened sacs and tubules is :
  • Nucleus
  • Mitochondrion
  • Endoplasmic reticulum
  • Lysosome
Lysosomes are produced by
  • Golgi complex
  • Mitochondria
  • Endoplasmic reticulum
  • Leucoplasts
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
Suggest which among the following is not a function attributed to endoplasmic reticulum?
  • Detoxification of poisons and drugs
  • Digestion/ egestion of foreign materials outside the cell
  • Manufacture of fat and lipid molecules
  • Biogenesis of membrane proteins
An animal cell, a plant cell and a bacterium share the following structural feature _______________.
  • Cell membrane, Endoplasmic reticulum, Vacuoles
  • Cell wall, Plasma membrane, Mitochondria
  • Cell wall, Nucleus, Cytoplasm
  • Plasma membrane, Cytoplasm, Ribosomes
The apoplast is located
  • Outside the plasma membrane
  • In the entire cytosol
  • On both sides of plasma membrane
  • In the plastidial content
Which of the following sentences is correct?
  • Cells of all living organisms have a nucleus
  • Both animal and plant cells have a well defined cell wall
  • In prokaryotes there are no membrane bound cell organelles
  • Cells are formed de novo from abiotic materials
Which of the following is always absent in prokaryotic cells?
  • Ribosome
  • Mitochondria
  • DNA
  • Cell wall
........... are embedded on the rough endoplasmic reticulum.
  • Ribosomes
  • Lysosomes
  • Centrosomes
  • Mesosomes
House keeping proteins are found in
  • Endoplasmic Reticulum
  • Cytoskeleton
  • Golgi Complex
  • All of the above
Pick the odd one out among the following.
  • Nucleus
  • Nucleolus
  • Chromosome
  • Ribosome
__________ is a prokaryote.
  • Amoeba
  • Bacteria
  • Yeast
  • Fungus
The type of ribosomes found in prokaryotic cells is
  • 100S
  • 80S
  • 60S
  • 70S
DNA is not associated with histones in
  • Prokaryotes
  • Eukaryotes
  • Fungi
  • Animals
An example of prokaryotic cell is
  • Green algae
  • Fungi
  • Bacteria
  • Bryophyte
Prokaryotes are characterized by
  • Absence of internal compartmentalisation
  • Absence of nucleus
  • $$70$$S ribosome
  • All the above
Karyology is the study of
  • Cytoplasm
  • Cell
  • Mitochondria
  • Nucleus
The nucleus is separated from surrounding cytoplasm by a nuclear membrane, which is:
  • Single layered with pores
  • Single layered without pores
  • Double layered with pores
  • Double layered without pores
In prokaryotes, mitochondria are absent. Krebs cycle occurs in
  • Cytoplasm
  • Nucleoid
  • Ribosome
  • Plasma membrane
Which one is included under prokaryotes?
  • Amoeba
  • Algae
  • Ulothrix
  • Mycoplasma and Blue-Green Algae
Which part of the prokaryotic cell contain N-acetylglucosamine?
  • Cell envelope
  • Cell wall
  • Nucleus
  • Ribosomes
The following are called "suicidal bags"
  • Centrosomes
  • Lysosomes
  • Microsomes
  • Mesosomes
The term cell membrane was coined by
  • Nageli and Cramer
  • Flemming
  • Sachs
  • Plowe.
"Each cell leads a double life" was first proposed by_______.
  • Schleiden
  • Grew
  • Von Mohl
  • Malpighi
The selectively permeable membrane of the cell is 
  • Plasmalemma
  • Cytoplasm
  • Cell wall
  • All of the above
Who believed in the individuality of cells?
  • Leeuwenhoek
  • Lamarck
  • Dutrochet
  • Malpighi
Average thickness of plasmalemma is
  • $$0.25 nm/2.5 \overset{o}{A}$$
  • $$2.5 nm/25 \overset{o}{A}$$
  • $$0.75 nm/7.5 \overset{o}{A}$$
  • $$7.5 nm/75 \overset{o}{A}$$.
Dense fibrous complex lying adjacent to inner membrane of nuclear envelope is
  • Chromatin
  • Fibrous lamina
  • Nuclear lamina
  • Both B and C.
Components of nucleus are
  • Karyotheca, nucleolus, chromatin and nucleoplasm
  • Nuclear envelope, nucleolus
  • Nuclear envelope, nucleoplasm and chromatin
  • All the above.
Distinction of individual cells is absent in coenoctic organism such as
  • Ulothrix.
  • Volvox.
  • Escherichia.
  • Rhizopus.
Cells are autonomous because ___________.
  • They synthesise components of living protoplasm from non living materials
  • They are able to grow and divided
  • Each cell has its own life span
  • All of the above
Autolysis is connected with
  • Ribosome
  • Kinetosome
  • Lysosome
  • Golgi apparatus
Cell organelles having acid hydrolases/digestive enzymes are
  • Peroxisome
  • Lysosomes
  • Ribosomes
  • Mesosomes
RER is well developed in cells engaged in synthesis of
  • Nucleotides
  • Proteins
  • Lipids
  • Secretory products
E.R. of rapidly dividing cells is _____________.
  • Non-functional
  • Poorly developed
  • Absent
  • Highly developed.
Nucleus was discovered by
  • Purkinje
  • Nageli
  • Robert Brown
  • Hofmeister
Smooth endoplasmic reticulum synthesizes
  • Carbohydrates
  • Proteins
  • Steroids and lipids
  • All of the above
Lysosomes are so called as they have
  • Oxidizing enzymes
  • Digestive enzymes
  • Respiratory enzymes
  • Carboxylating enzymes
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