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

Function of lysosome is
  • Breakdown of cell substances
  • Synthesis of proteins
  • Photosynthesis
  • Breakdown of water
Lysosome enzymes are active at pH
  • 5
  • 7
  • 8
  • Variable
Organelle involved in modification and routing of newly synthesised proteins to their destination is
  • Chloroplast
  • Lysosome
  • Mitochondrion
  • Endoplasmic reticulum
Pick up the correct statements.
Mitochondrion contains DNA.
70 S ribosomes occur in prokaryotes.
Ribosomes are made up of phospholipids and oligosaccharides.
Ribosomes are not found in protista and monera.
  • 1, 2, 3 correct
  • 1, 2 correct
  • 2, 4 correct
  • 1, 3 correct
Cell organelle connected with intracellular digestion of macromolecules is
  • Lysosome
  • Peroxisome
  • Polysome
  • Glyoxisome
  • Dictyosome
The term plasmalemma was coined by
  • Nageli and Cramer
  • Plowe
  • Metchnikoff
  • Lewis
Disappearance of tadpole tail during metamorphosis is brought about by
  • Lysosomes
  • Golgi bodies
  • Peroxisomes
  • Endoplasmic reticulum.
Prokaryotic cell does not possess
  • Centrioles
  • Membrane bound organelles
  • Desmosomes
  • All of the above
Difference between active and passive modes of membrane transport is
  • Active transport is confined to cations while passive is connected to anions
  • Active transport is non-selective while passive one is selective
  • Active transport requires metabolic energy while passive transport requires concentration gradients
  • Active transport is more rapid.
Which of these is wrongly matched?
  • Chloroplasts - chlorophyll
  • Elaioplasts - starch
  • Chromoplasts - carotenoides
  • Amyloplasts - carbohydrates
  • Aleuroplasts - proteins
The first lipid model of biomembranes was proposed by
  • Danielli
  • Robertson
  • Overton
  • Danielli and Davson
Match the columns:
Column IColumn II
(a)Endoplasmic reticulum(i)Cellular respiration
(b)Free ribosome(ii)Osmoregulation and excretion
(c)Mitochondrion(iii)Synthesis of lipids
(d)Contractile(iv)Synthesis of non secretory proteins
  • a-i, b-ii, c-iv, d-iii
  • a-iii, b-iv, c-i, d-ii
  • a-iii, b-iv, c-ii, d-i
  • a-iii, b-ii, c-i, d-iv
  • a-ii, b-i, c-iii, d-iv.
The plasma membrane consists of
  • Proteins embedded in a phospholipid bilayer
  • Protein embedded in a polymer of glucose molecules
  • Proteins embedded in a carbohydrate bilayer
  • Phospholipids embedded in a protein bilayer
S.E.R. takes part in
  • Steroid synthesis
  • Detoxification
  • Both A and B
  • Nissl granules
Which of the following statement is correct?
  • Elaioplasts store starch whereas aleuroplasts store proteins
  • Acrocentric chromosomes have only one arm
  • The core of cilium or flagellum is the basal body
  • Membranous extensions into cytoplasm in cynobacteria which contain pigments are called chromatophores.
Enzymes facilitating transport across cell membrane is
  • Ligase
  • Lipase
  • Endonuclease
  • Permease
An interconnected membranous network of the cell composed of vesicles, flattened sacs and tubules is
  • Mitochondria
  • Endoplasmic reticulum
  • Lysosomes
  • Nucleus.
Plastids which store oil are
  • Amyloplasts
  • Rhodoplasts
  • Chloroplasts
  • Elaioplasts
Select the correct statements.
(a) Endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.
(b) ER helps in transport of substances, synthesis of proteins, lipoproteins and glycogen.
(c) Ribosomes are involved in protein synthesis.
(d) Mitochondria help in oxidative phosphorylation and generation of ATP.
  • b, c and d are correct
  • a alone is correct
  • b alone is correct
  • c alone is correct
  • d alone is correct.
Ergastoplasm is the alternate name of
  • Endoplasmic reticulum
  • Ribosomes
  • Idioblast
  • Ectoplast
Interconnected flattened sacs of endoplasmic reticulum are called
  • Cisternae
  • Ribosomes
  • Tubules
  • Stroma
Protein storing plastids are called
  • Aleuroplasts
  • Aleuronoplasts
  • Protoplasts
  • Autoplasts
Which is common between chloroplasts, chromoplasts and leucoplasts?
  • Presence of pigments
  • Presence of thylakoids and grana
  • Storage of starch, proteins and lipids.
  • Ability to multiply by a fission-like process.
Cellular organelles with membranes are
  • Nuclei, ribosomes and mitochondria
  • Chromosomes, ribosomes and endoplasmic reticulum
  • Endoplasmic reticulum ribosomes and nuclei
  • Lysosomes, Golgi apparatus and mitochondria
GERL system is formed of
  • Golgi body, endoplasmic reticulum, ribosome and lysosome
  • Golgi body, endoplasmic reticulum and lysosome
  • Golgi body, endoplasmic reticulum and ribosome
  • Golgi body, ribosome and lysosome.
Lysosomes are formed from _________.
  • E.R.
  • Golgi bodies
  • Mitochondria
  • Both A and B
Which of the following sequence is correct for the origin of lysosome
  • Endoplasmic reticulum - Golgi complex - Lysosomes
  • Nuclear membrane - Golgi complex - Lysosomes
  • Endoplasmic complex - Vacuoles - Lysosomes
  • Mitochondria - Golgi complex - Lysosomes.
Which is not constituent of cell membrane?
  • Glycolipids
  • Phospholipids
  • Cholesterol
  • Proline
Respiratory enzymes occur in bacteria in
  • Plasma membrane
  • Mitochondria
  • Golgi apparatus
  • E.R.
Double membraned envelop is found in
  • Mitochondria, Golgi apparatus and chloroplast
  • Mitochondria, nucleus and chloroplast
  • Nucleus, Golgi apparatus and endoplasmic reticulum
  • Nucleus, ribosome and chloroplast
Porins are
  • Polysaccharides
  • Proteins
  • Nucleic acid
  • Bacteria
Which of the following is incorrect
  • Plasmalemma is the outer cell membrane
  • Membrane surrounding an organelle is called subcellular membrane
  • Membranes forming endoplasmic reticulum are biomembranes
  • Prokaryotic cells have subcellular membranes.
The cell membranes of adjacent cells are fused at this cell junction.
  • Macula adherens
  • Zonula adherens
  • Zonula occludens
  • Nexus
Which of following organisms can be seen only under the microscope?
  • Unicellular
  • Multicellular
  • Vertebrates
  • All of the above
The chief functions of ER are

I. Protein synthesis
II. Lipid synthesis
III. Glycogen synthesis
IV. Cholesterol synthesis
V. ATP synthesis
VI. Detoxification

Choose the correct answer.
  • I, II, III, IV, VI
  • I, II, IV, V
  • II, III, IV, V
  • III, IV, V, VI
ATP is required for
  • Active process
  • Passive process
  • All types of processes
  • None of the above.
Which of the following statements concludes that ruminants are multicellular animals?
  • They have specialized organs for digestion.
  • They can reproduce.
  • They have lungs for breathing.
  • Both A and C.
The eukaryotic genome differs from the prokaryotic genome because
  • The DNA is complexed with histone in prokaryotes
  • The DNA is circular and single stranded in prokaryotes
  • Repetitive sequences are present in eukaryotes
  • Genes in the former case are organised into operons
Most of the hydrolytic enzymes of lysosome function at
  • Acidic pH
  • Alkaline
  • Neutral pH
  • Both (b) and (c)
 Endoskeleton of cell is :
  • Cell wall
  • Mitochondria
  • Endoplasmic reticulum
  • Cytoplasm
Lysozyme is an
  • Antiviral
  • Antibacterial
  • Antiprotozoan
  • All of the above
Secretory polypeptide carrying signal peptide is called _______.
  • Peptone
  • Enzyme
  • Preprotein/Proprotein
  • Protein
Signalling theory with respect to cell is related to
  • Nervous system
  • Emergency
  • Formation of special membrane Iipids
  • Synthesis of secretory proteins
Lysosomes take part in :
  • Intracellular digestion
  • Extracellular digestion
  • Fat breakdown
  • Both (A) and (B)

Which of the following is not a feature of a prokaryotic cell?
  • Ribosomes
  • DNA
  • Cell wall
  • Endoplasmic reticulum
Which of the following cell organelles stores hydrolytic enzymes?
  • Centriole
  • Lysosome
  • Chromoplast
  • Chloroplast
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum?
  • Proteins
  • Lipids
  • Carbohydrates
  • Nucleotides
Which enzyme can hydrolyse peptidoglycans 
  • Amylase
  • Lipase
  • Trypsin
  • Lysozome
Which group of organelles is involved in synthesis of substances needed by Cell ?
  • Lysosome , vacuole , ribosome
  • Vacuole ,RER , SER
  • Ribosome . RER , SER
  • RER , lysosome , vacuole
A close relationship between ER, lysosome and dictyosomes is denoted as
  • Vacuolar system
  • GERL
  • Annulate lamellae
  • Internal mileu
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