CBSE Questions for Class 11 Medical Biology Cell The Unit Of Life Quiz 8 - MCQExams.com

Select the most appropriate option.

Eukaryotic cells have a dense double membrane-bound structure inside, called:
  • Nucleus
  • Cytoplasm
  • Golgi apparatus
  • Vacuole
The nucleus has a double layered covering called as:
  • Cell membrane
  • Cytoplasmic membrane
  • Nuclear membrane
  • Capsule
Which of the following is correct for prokaryotic cell?
  • This type of cell is smaller than eukaryotic cell.
  • They lack true nucleus
  • Cell division is fast.
  • All of the above.
What are the recycling units of a cell?
  • Mitochondria
  • Cell membrane
  • Cell wall
  • Lysosomes
Which of the following act as a kind of waste disposal system of the cell?
  • Mitochondria
  • Gas vacuoles
  • Plastids
  • Lysosomes
Which of the following organelles does not contain RNA?
  • Plasmalemma
  • Ribosome
  • mRNA
  • Nucleolus
Which of the following cell organelles stores hydrolytic enzymes?
  • Centriole
  • Lysosome
  • Chromoplast
  • Chloroplast
The endoplasmic reticulum remains in continuation with
  • Golgi body
  • Nuclear wall
  • Mitochondria
  • Cell wall
The thickness of unit membrane is
  • 20 $${ A }^{ \circ}$$
  • 35 $${ A }^{ \circ }$$
  • 55 $${ A }^{ \circ }$$
  • 75 $${ A }^{ \circ }$$
Which of the following is the secretory organelle of the cell ?
  • Mitochondria
  • Golgi apparatus
  • Endoplasmic reticulum
  • Chloroplast
The nucleus is separated from cytoplasm by
  • Protoplasm
  • Cell membrane
  • Cell wall
  • Nuclear membrane
Which organelle transports proteins to golgi apparatus?
  • Endoplasmic reticulum
  • Mitochondria
  • Chloroplast
  • Nucleus
Enzymes of lysosomes are synthesized in _____________.
  • Golgi apparatus
  • Liver cells
  • Rough endoplasmic reticulum
  • Smooth endoplasmic reticulum
In active transport, carrier proteins are used, which use energy in the form of ATP, to
  • Transport molecules against concentration gradient of cell wall
  • Transport molecules along concentration gradient of cell membrane
  • Transport molecules against concentration gradient of cell membrane
  • Transport molecules along concentration gradient of cell wall
The cellular respiration in prokaryotes takes place in
  • Mitochondria
  • Cytoplasm
  • Pyruvate
  • Lactic acid
  • Glucose
Choose the incorrect pair from the following.
  • Nucleus - RNA
  • Lysosome - Protein synthesis
  • Mitochondria - Respiration
  • Cytoskeleton - Microtubules
What is genophore?
  • DNA in prokaryotes
  • DNA and RNA in prokaryotes
  • DNA and protein in prokaryotes
  • RNA in prokaryotes
Which of the following organism has single point of origin of replication in  chromosome?
  • Eukaryotes
  • Archae
  • Fungi
  • Bacteria
Example of water soluble plant pigment is
  • Chlorophyll-a
  • Chlorophyll-b
  • Anthocyanin
  • Xanthophyll
SER and RER can be distinguished with it's presence in
  • Protein synthesising cells
  • Protein and lipid synthesising cells
  • Carbohydrates and fat synthesising cells
  • Fat and protein synthesising cells
Name the cell structures which are bounded by a membrane.
I- Lysosomes
II- Endoplasmic reticulum
III- Centrosome
IV- Mitochondria
  • II only
  • IV only
  • I and II
  • I, II and IV
  • II, III and IV
Which one of the cell organelles is enclosed by a single membrane?
  • Mitochondria
  • Chloroplasts
  • Lysosomes
  • Nuclei
Cyanobacteria are photosynthetic prokaryotes. Which of the following cell structures are absent in cyanobacteria?
I. Cell membrane
II. Nucleus
III. Ribosomes
  • I only
  • II only
  • III only
  • I and II only
  • I and III only
Cell nucleus is the site for
I. RNA synthesis 
II. Proteins synthesis 
III. DNA synthesis
  • I only
  • II only
  • III only
  • I and III only
  • I, II and III
The endoplasmic reticulum produces protein and are secreted from the cell by
  • Diffusion
  • Osmosis
  • Pinocytosis
  • Exocytosis
  • Passive transport
The organelles that are present in eukaryotes but not in prokaryotes is/are: 
  • Nucleus
  • Mitochondria
  • Ribosome
  • Both A and B
  • Both A and C
An organelle bounded by a membrane and is responsible for synthesis of secreted proteins is
  • Nucleus
  • Endoplasmic reticulum
  • Ribosome
  • Golgi apparatus
  • Lysosome
The direction of movement of sodium through sodium leak channels is 
  • Out of the cell by simple diffusion
  • Into the cell by simple diffusion
  • Out of the cell by facilitated diffusion
  • Into the cell by facilitated diffusion
  • Into the cell by active transport
Which membrane bound organelle contains hydrolytic enzymes?
  • Nucleus
  • Endoplasmic reticulum
  • Ribosome
  • Golgi apparatus
  • Lysosome
................ is present inside the nucleus of a cell.
  • Mitochondrion
  • Ribosome
  • Endoplasmic reticulum
  • Chromatin
  • Centriole
What is the function of lysosome?
  • Digestion of intracellular debris
  • Production of energy through photosynthesis
  • Regulation of transport
  • Storage of nutrients
  • Lipid synthesis
The function of lysosomal membrane is _________.
  • It isolates an acidic environment for the lysosome's hydrolytic enzymes from the neutral pH of the cytoplasm.
  • It is continuous with the nuclear membrane, thereby linking the lysosome with the endoplasmic reticulum.
  • It is used as an alternative site of protein synthesis.
  • The cytochrome carriers of the electron transport chain are embedded within it.
  • It separates the nucleus from the cytoplasm.
Which of the following feature differentiates Monera from other kingdoms?
  • All monerans are prokaryotes.
  • All monerans are eukaryotes.
  • Monerans have a cell wall whereas other organisms only have cell membranes.
  • Monerans are angiosperms, whereas all other organisms are gymnosperms.
  • All monerans exhibit radial cleavage.
What is true about the growth pattern of plate I?
485673_32f6b5820a794f72a39d79c8e1e54011.png
  • Bacteria 2 produces an antibiotic to which bacteria 1,3, and 4 are susceptible.
  • Bacteria 2 produces an antibiotic to which bacteria 4 is susceptible.
  • Bacteria 2 produces an antibiotic to which bacteria 1 and 4 is susceptible.
  • Bacteria 4 require a protein produced by bacteria 1.
  • Bacteria 4 require a protein produced by bacteria 3.
Lipid and hormone synthesis takes place in
  • Golgi body
  • Mitochondrion
  • Ribosome
  • Endoplasmic reticulum
  • Lysosome
Which of the following structures would be absent in E. coli after its centrifugation using standard laboratory protocols?
  • Ribosomes
  • DNA
  • Cell wall
  • RNA
  • Mitochondria
Human red blood cell when placed in distilled water would ___________.
  • Shrivel
  • Plasmolyze
  • Lyse
  • Dehydrate
  • Be uaffected
The codes for the specific proteins produced by a cell lies in the ________.
  • Ribosome
  • Endoplasmic reticulum
  • Chloroplast
  • Mitochondria
  • None of the above
The incorrect statement about plasma membrane is
  • It serves as a selectively permeable barrier to the external environment.
  • It serves as a mediator between the internal and external environments.
  • In Eukaryotas, it contains the cytochrome chain of oxidative phosphorylation.
  • It contains phospholipids as a structural component.
  • It contains proteins that in some cases span the membrane.
The presence of cell membrane but absence of a true nucleus is the characteristic of __________.
  • Virus
  • Bacteria
  • Amoeba
  • Planaria
  • Sponge
Choose the pair with incorrect relationship.
  • Fat, lipid
  • Starch, polysaccharide
  • Starch, carbohydrate
  • Sugar, carbohydrate
  • Enzyme, lipid
All of the following organelles are associated with an endomembrane except
  • Nucleus
  • Vesicles
  • Golgi apparatus
  • Endoplasmic reticulum
  • Plasma membrane
The given structure represents
491570_e35d0bac4f7848739e09ea03d345a10a.png
  • Plasma membrane
  • Chloroplast
  • Endoplasmic reticulum
  • Golgi apparatus
  • Mitochondrion
Which of these cell organelles stores starch grains and oil drops?
  • Mitochondria
  • Leucoplast
  • Chloroplast
  • Ribosome
Identify the odd one out.
  • Chromosome
  • Gamete
  • Nucleus
  • Gene
Prokaryotes contain
  • Golgi body
  • Mitochondrion
  • Ribosome
  • Endoplasmic reticulum
  • Lysosome
Which of the following is true of the colourless plastid and its function?
  • Chloroplasts perform photosynthesis.
  • Leucoplasts performs respiration.
  • Chromoplasts are involved with protection from sunlight.
  • Leucoplasts help in the storage of food.
Which of the following is the intracellular transport structure that helps in the protein and lipid synthesis?
  • Ribosomes
  • Microtubules and microfilaments
  • Golgi complex
  • Endoplasmic reticulum
Which of the follwing are membrane bound structures?
I. Ribosome
II. Plasma membrane
III. Endoplasmic reticulum
IV. Golgi body
  • II only
  • IV only
  • I and II
  • I, II and III
  • II, III and IV
The variously coloured plastids are called
  • Chloroplasts
  • Chromoplasts
  • Leucoplasts
  • Both (A) and (B)
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