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In the given figure of animal cell, one orginelle is marked as A. Select the correct identification and function of the organelle A from the given option.

A. Endoplasmic reticulum Synthesis of lipids.

B. Mitochondria Produce cellular energy in the form of ATP.

C. Golgi body Provides packaging material.

D. Lysosomes Secrete hydrolytic enzymes.

Correct Answer :

B. Mitochondria Produce cellular energy in the form of ATP.


In fig., (A) shows the cell organelle mitochondria. The mitochondria are bounded by two membranes, i.e., outer membrane and inner membrane. Mitochondria are referred as power house of the cell as they produce 95% of ATP. This energy is produced during the break down of food molecules which involve glycolysis, oxidative decarboxylation and oxidative phosphorylation (Krebs cycle and respiratory chain).

Related Questions

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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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Chromosomes having equal or almost equal arms are called

A. metacentric

B. acrocentric

C. polycentric

D. acentric.

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Which of the following statements are correct ?
  1. In prokaryotic cells, a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome.
  2. The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins.
  3. RuBisCO is the most abundant protein in the whole biosphere.
  4. 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)

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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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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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The cell theory was given in year 1839 by Schleiden and Schwann. According to this theory all organisms are composed of cell and cells are the basic unit of life.
How did this theory help in the field of science?

A. It helped to study the working of cells.

B. It helped in curing diseases caused by cell.

C. It helped in restating the earlier theories on cell.

D. It helped in introducing the use of microscopes to study cell.

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Microtubules are absent in

A. mitochondria

B. centriole

C. flagella

D. spindle fibres

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Which one of the following organelle given below is correctly matched with its function ?

A. Golgi apparatus Protein synthesis

B. Golgi apparatus Formation of glycolipids

C. Rough endoplasmic reticulum Protein synthesis

D. Rough endoplasmic reticulum Formation of glycoproteins

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Function of RER is

A. autolysis

B. protein synthesis

C. lipid synthesis

D. carbohydrate synthesis

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Cell sap is a

A. living content of cytoplasm.

B. nonliving content of cytoplasm.

C. nonliving content of vacuole.

D. living content of vacuole.

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4

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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4

Which one of the following combination is mismatched?

A. Glycocalyx May be capsule or slime layer

B. Pili Reproduction

C. Cell wall Protective, determines shape, prevents from bursting

D. Flagella, pili and fimbriae Surface structures of bacterial cell

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4

Which of the following statements is/are correct ?
  1. The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles.
  2. ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen.
  3. Ribosomes are involved in protein synthesis.
  4. Mitochondria help in oxidative phosphorylation and generation of ATP.

A. (ii), (iii) & (iv)

B. (i) only

C. (ii) only

D. (iii) only

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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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The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D).

Select the part correctly matched with its function.

A. Part (D): Outer membrane Gives rise to inner membrane by splitting.

B. Part (B): Inner membrane Forms infoldings called cristae.

C. Part (C): Cristae Possess single circular DNA molecule and ribosomes.

D. Part (A): Matrix Major site for respiratory chain enzymes.

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4

Match column-I with column-II and choose the correct option.
Column-IColumn-II
A. TonoplastI. Contain digestive enzyme
B. Contractile vacuoleII. Store metabolic gases
C. Food vacuoleIII. Excretion
D. Air vacuoleIV. Transport of ions in plants

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

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

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

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

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4

Which of the following is incorrect ?

A. Mycoplasma is the smallest cell (0.3 �).

B. Bacteria are 3 to 5 �m in size.

C. The largest cell is the egg of an ostrich.

D. Nerve cells are some of the smallest cells.

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Which of the following terms is not correctly matched with its feature?

A. Osmosis Movement of water by diffusion.

B. Nucleoplasm Site of active synthesis of ribosomal RNA.

C. Mesosome Infolding of cell membrane and characteristics of eukaryotes.

D. Pili Elongated tubular surface structures (made of special protein) of bacteria.

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4

Which of the following statement of a bacterial cell is/are correct?
  1. Mesosome is formed by the extensions of plasma membrane into the cell.
  2. The pili are elongated tubular structures made up of a protein.
  3. Flagellum is composed of filament, hook and basal body.
  4. Ribosomes are about 30 nm by 50 nm in size.

A. (i), (ii), (iii)

B. All of the above

C. (ii) & (iv)

D. None of the above

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The following diagram represents a structure chromosome.
Identify the structures marked as A, B and C.

A. A - Satellite, B - Primary constriction, C - Acrocentric

B. A - Satellite, B - Secondary constriction, C - Metacentric

C. A - Satellite, B - Centromere, C - Telocentric

D. A - Satellite, B - Centromere, C - Submetacentric

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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.

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Polysome is a chain of

A. oxysomes

B. sphaerosomes

C. ribosomes

D. dictyosomes

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Plastids are found in

A. all animal cells.

B. some animal cells.

C. all plant cells.

D. all plant cells and euglenoides.

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Golgi apparatus is absent in

A. higher plants

B. yeast

C. bacteria and blue-green algae

D. None of the above

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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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Match column-I (cell organelle) with column-II membrane and select the correct option from the codes given below.
Column-IColumn-II
A. MitochondriaI. Without membrane
B. LysosomesII. Single membrane
C. RibosomesIII. Double membrane

A. A - I, B - II, C - III

B. A - III, B - I, C - II

C. A - III, B - II, C - I

D. A - II, B - III, C - I

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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.

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4

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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4

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).

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The membrane of the erythrocytes has approximately ___% of proteins and ___% lipids.

A. 42, 50

B. 52, 40

C. 50, 50

D. 60, 40