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Which of the following lacks cell wall?

A. Gametes

B. Amoeba

C. Mycoplasma

D. All of these

Correct Answer :

D. All of these


Cell wall is a characteristic feature to cells of plants, bacteria, fungi, algae and some archaea. It is located outside the cell membrane. The major function of the cell wall is to provide rigidity, tensile strength, structural support, protection against mechanical stress and infection. It also help in diffusion of gases in and out of the cell. Gametes, Amoeba and Mycoplasma lack cell wall.

Related Questions

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Which one of the following is not considered as part of the endomembrane system?

A. Golgi complex

B. Peroxisome

C. Vacuole

D. Lysosome

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Grana are

A. protein storing plastids.

B. coloured plastids.

C. stacks of thylakoids.

D. individual thylakoids present in stroma.

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_______________ is the important site of formation of glycoproteins and golycolipids.

A. SER

B. Lysosome

C. Golgi apparatus

D. Mitochondria

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Function of contractile vacuole in Amoeba is

A. excretion and osmoregulation.

B. digestion and respiration.

C. osmoregulation and transportation.

D. none of the above.

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Active transport across biomembrane involves

A. production of ATP

B. requirement of energy

C. production of toxin

D. release of energy

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Match column-I with column-II and choose the correct option.
Column-IColumn-II
(Chromosome)(Position of Centromere)
A. MetacentricI. At the tip
B. SubmetacentricII. Almost near the tip
C. AcrocentricIII. At the middle
D. TelocentricIV. Slightly away from the middle

A. A III; B IV; C II; D I

B. A IV; B III; C II; D I

C. A I; B II; C III; D IV

D. A IV; B III; C I ; D II

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4

Which of the following is not the function of cell wall?
  1. Provides shape to the cell.
  2. Protects the cell from mechanical damage and infection.
  3. Helps in cell to cell interaction.
  4. Provides barrier to undesirable macromolecules.

A. Only (i)

B. Only (iv)

C. Only (ii), (iii) and (iv)

D. None of the above

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Which of the following is absent in prokaryotes?

A. DNA

B. RNA

C. Plasma membrane

D. Mitochondria

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A student placed two cells in the same solution in two different containers. The observation was given in the table.
ContainerObservation
1Cell burst
2Cell does not change its shape

Which structure maintains the shape of the cell present in container 2 and provides the most significant difference between the two cells?

A. Nucleus

B. Cell wall

C. Chloroplast

D. Cell membrane

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Which of the following pair are correctly matched ?
(I) Amyloplasts Store proteins
(II) Mitochondrion Power house of the cell
(III) Stroma Chlorophyll pigment
(IV) Axoneme 9 + 2 array

A. (I) and (III) only

B. (II), (III) and (IV) only

C. (III) and (IV) only

D. (II) and (IV) only

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Identify the components labelled as A, B, C, D and E in the diagram given below from the list (i) to (viii).

  1. Cristae of mitochondria
  2. Inner membrane of mitochondria
  3. Cytoplasm
  4. Smooth endoplasmic reticulum
  5. Rough endoplasmic reticulum
  6. Mitochondrial matrix
  7. Ribosome
  8. Nucleus

A. A - (viii), B - (v), C - (vii), D - (iii), E - (iv)

B. A - (i), B - (iv), C - (vii), D - (vi), E - (iii)

C. A - (vi), B - (v), C - (iv), D - (vii), E - (i)

D. A - (v), B - (i), C - (iii), D - (ii), E - (iv)

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Which function is carried out by the cell organelle 'X'?

A. helps control the movement of substance in and out of the cell

B. passes information from the parent cell to newly formed cell

C. maintains the proper shape of the cell and serves as a protective barrier

D. helps the cell to make food with the help of chlorophyll and sunlight

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4

Study the following statements on cilium or flagellum and answer the question.
  1. Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
  2. Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.
  3. Flagella are comparatively longer and responsible for cell movement.
  4. 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)

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4

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.

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Golgi apparatus is concerned with

A. excretion

B. secretion

C. ATP synthesis

D. RNA synthesis

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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

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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.

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The diagram given below represent a filuid mosaic model of plasma membrance. Match the components marked as A, B, C, D and E in the diagram below from the list (i) to (vii).

  1. Sugar
  2. Protein
  3. Lipid bilayer
  4. Integral protein
  5. Cytoplasm
  6. Cell wall
  7. External protein

A. A - (i), B - (ii), C - (iii), D - (iv), E - (v)

B. A - (ii), B - (i), C - (iii), D - (iv), E - (v)

C. A - (i), B - (ii), C - (iii), D - (iv), E - (vi)

D. A - (i), B - (ii), C - (iii), D - (vii), E - (v)

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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.

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Identify the components labelled A, B, C and D in the given section of cilia/flagella showing different parts. Choose the option which shows the correct labelling of parts.

A. A Plasma membrane, B Interdoublet bridge, C Central microtubule, D Radial spoke

B. A Plasma membrane, B Arm, C Central microtubule, D Radial spoke

C. A Plasma membrane, B Interdoublet bridge, C Hub, D Radial spoke

D. A Plasma membrane, B Interdoublet bridge, C Hub, D Arm

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What would happen if lysosomes get ruptured in a cell?

A. Cell dies

B. Cell shrinks

C. Cell swell up

D. Nothing would happen

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Microtubules are absent in

A. mitochondria

B. centriole

C. flagella

D. spindle fibres

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9.A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which the student infers that the samples contain the organelles.
Sample ASample B
Make energy available for cellular metabolismGenerates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the bodyPresent in plant cell
Called the energy currency of cellSource o f all the food energy

Explain why the samples were belonged to eukaryotic cell and not prokaryotic cell? Because,

A. eukaryotic cell have membrane bound organelles.

B. eukaryotic cell have non - membrane bound organelles.

C. eukaryotic cell are smaller and multiply more rapidly than prokaryotic cells.

D. eukaryotic cell are larger and multiply more rapidly than prokaryotic cells.

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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

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Which one of the following structures between two adjacent cells is an effective transport pathway?

A. Plasmodesmata

B. Plastoquinones

C. Endoplasmic reticulum

D. Plasmalemma

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Given below are some characters of a cell organelle identify the correct organelle which shows all the characters described above.
  1. It is a membrane bound space found in the cytoplasm.
  2. It is bound by a single membrane called tonoplast.
  3. It contains water, sap, excretory products and other materials not useful to the cell.
  4. It has higher concentration of sap than the cytoplasm.

A. Golgi apparatus

B. Lysosomes

C. Endoplasmic reticulum

D. Vacuoles

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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.

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Axoneme with 9 + 2 microtubular arrangement occurs in

A. cilia

B. flagella

C. both (a) and (b)

D. centriole

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Identify the cell organelle given below. Which is an important site of formation of glyeoproteins & glycolipids

A. Rough endoplasmic reticulum

B. Smooth endoplasmic reticulum

C. Golgi body

D. mitochondria

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Which one of the following cellular parts is correctly matched with their characters ?

A. Centrioles Sites for active RNA synthesis.

B. Lysosomes Optimally active at a pH of about 8.5.

C. Thylakoids Flattened membranous sacs forming the grana of chloroplasts.

D. Ribosomes Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S).